Table Of ContentAmazon Relational
Database Service
User Guide
Amazon Relational Database Service User Guide
Amazon Relational Database Service: User Guide
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Amazon Relational Database Service User Guide
Table of Contents
What is Amazon RDS? ........................................................................................................................ 1
Overview................................................................................................................................... 1
Amazon EC2 and on-premises databases ............................................................................... 1
Amazon RDS and Amazon EC2 ............................................................................................ 2
Amazon RDS Custom for Oracle and Microsoft SQL Server ...................................................... 3
Amazon RDS on AWS Outposts ............................................................................................ 3
DB instances.............................................................................................................................. 3
DB engines........................................................................................................................ 4
DB instance classes............................................................................................................ 4
DB instance storage............................................................................................................ 4
Amazon Virtual Private Cloud (Amazon VPC) ......................................................................... 5
AWS Regions and Availability Zones ............................................................................................. 5
Security.................................................................................................................................... 5
Monitoring an Amazon RDS DB instance ....................................................................................... 5
How to work with Amazon RDS ................................................................................................... 5
AWS Management Console .................................................................................................. 6
Command line interface ...................................................................................................... 6
Programming with Amazon RDS .......................................................................................... 6
How you are charged for Amazon RDS ......................................................................................... 6
What's next?.............................................................................................................................. 6
Getting started.................................................................................................................. 6
Topics specific to database engines ...................................................................................... 6
DB instances.............................................................................................................................. 8
DB instance classes................................................................................................................... 10
DB instance class types ..................................................................................................... 10
Supported DB engines ...................................................................................................... 13
Determining DB instance class support in AWS Regions ......................................................... 51
Changing your DB instance class ........................................................................................ 54
Configuring the processor ................................................................................................. 54
Hardware specifications..................................................................................................... 68
DB instance storage .................................................................................................................. 77
Storage types.................................................................................................................. 77
General Purpose SSD storage ............................................................................................. 77
Provisioned IOPS storage .................................................................................................. 79
Comparing SSD storage types ............................................................................................ 81
Magnetic storage.............................................................................................................. 82
Monitoring storage performance ........................................................................................ 82
Factors that affect storage performance .............................................................................. 82
Regions, Availability Zones, and Local Zones ................................................................................ 85
AWS Regions................................................................................................................... 86
Availability Zones............................................................................................................. 88
Local Zones..................................................................................................................... 89
Supported Amazon RDS features by Region and engine ................................................................ 90
Table conventions............................................................................................................. 90
Feature quick reference ..................................................................................................... 90
Blue/Green Deployments................................................................................................... 92
Cross-Region automated backups ....................................................................................... 92
Cross-Region read replicas ................................................................................................. 93
Database activity streams .................................................................................................. 94
Dual-stack mode.............................................................................................................. 98
Export snapshots to S3 ................................................................................................... 104
IAM database authentication............................................................................................ 109
Kerberos authentication.................................................................................................. 111
Multi-AZ DB clusters....................................................................................................... 116
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Performance Insights...................................................................................................... 120
RDS Custom................................................................................................................... 120
Amazon RDS Proxy ......................................................................................................... 123
Secrets Manager integration ............................................................................................ 129
Engine-native features.................................................................................................... 129
Multi-AZ deployments............................................................................................................. 131
Multi-AZ DB instance deployments ................................................................................... 132
Multi-AZ DB cluster deployments ..................................................................................... 137
DB instance billing for Amazon RDS ......................................................................................... 149
On-Demand DB instances ................................................................................................ 150
Reserved DB instances .................................................................................................... 151
Setting up..................................................................................................................................... 159
Sign up for an AWS account .................................................................................................... 159
Create an administrative user ................................................................................................... 159
Create IAM user access keys ..................................................................................................... 160
Determine requirements.......................................................................................................... 161
Provide access to your DB instance ........................................................................................... 162
Getting started ............................................................................................................................... 165
Creating a MariaDB DB instance and connecting to a database ..................................................... 166
Creating a MariaDB DB instance ....................................................................................... 166
Connecting to a database on a DB instance running MariaDB ............................................... 170
Deleting a DB instance .................................................................................................... 173
Creating a SQL Server DB instance and connecting to it .............................................................. 174
Creating a sample SQL Server DB instance ........................................................................ 174
Connecting to your sample DB instance ............................................................................ 178
Exploring your sample DB instance ................................................................................... 181
Deleting your sample DB instance .................................................................................... 182
Creating a MySQL DB instance and connecting to a database ....................................................... 184
Creating a MySQL DB instance ......................................................................................... 184
Connecting to a database on a DB instance running MySQL ................................................. 188
Deleting a DB instance .................................................................................................... 191
Creating an Oracle DB instance and connecting to a database ...................................................... 192
Creating a sample Oracle DB instance ............................................................................... 192
Connecting to your sample DB instance ............................................................................ 196
Deleting your sample DB instance .................................................................................... 198
Creating a PostgreSQL DB instance and connecting to a database ................................................. 199
Creating a PostgreSQL DB instance ................................................................................... 199
Connecting to a PostgreSQL DB instance ........................................................................... 203
Deleting a DB instance .................................................................................................... 209
Tutorial: Create a web server and an Amazon RDS DB instance ..................................................... 210
Launch an EC2 instance ................................................................................................... 211
Create a DB instance ....................................................................................................... 215
Install a web server ........................................................................................................ 219
Tutorials and sample code ............................................................................................................... 226
Tutorials in this guide ............................................................................................................. 226
Tutorials in other AWS guides .................................................................................................. 227
Tutorials and sample code in GitHub ......................................................................................... 227
Best practices for Amazon RDS ........................................................................................................ 228
Amazon RDS basic operational guidelines .................................................................................. 228
DB instance RAM recommendations .......................................................................................... 229
Using Enhanced Monitoring to identify operating system issues .................................................... 229
Using metrics to identify performance issues ............................................................................. 229
Viewing performance metrics ........................................................................................... 229
Evaluating performance metrics ....................................................................................... 232
Tuning queries....................................................................................................................... 233
Best practices for working with MySQL ..................................................................................... 234
Table size...................................................................................................................... 234
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Number of tables........................................................................................................... 234
Storage engine............................................................................................................... 235
Best practices for working with MariaDB ................................................................................... 235
Table size...................................................................................................................... 235
Number of tables........................................................................................................... 236
Storage engine............................................................................................................... 236
Best practices for working with Oracle ...................................................................................... 236
Best practices for working with PostgreSQL ............................................................................... 236
Loading data into a PostgreSQL DB instance ...................................................................... 237
Working with the PostgreSQL autovacuum feature ............................................................. 237
Amazon RDS for PostgreSQL best practices video ............................................................... 238
Best practices for working with SQL Server ................................................................................ 238
Amazon RDS for SQL Server best practices video ................................................................ 239
Working with DB parameter groups .......................................................................................... 239
Best practices for automating DB instance creation ..................................................................... 239
Amazon RDS new features and best practices presentation video .................................................. 240
Configuring a DB instance ............................................................................................................... 241
Creating a DB instance ............................................................................................................ 242
Prerequisites.................................................................................................................. 242
Creating a DB instance .................................................................................................... 245
Available settings........................................................................................................... 249
Creating a Multi-AZ DB cluster ................................................................................................. 264
Prerequisites.................................................................................................................. 264
Creating a DB cluster ...................................................................................................... 267
Available settings........................................................................................................... 270
Nonapplicable settings.................................................................................................... 277
Creating resources with AWS CloudFormation ............................................................................ 278
RDS and AWS CloudFormation templates .......................................................................... 278
Learn more about AWS CloudFormation ............................................................................ 278
Connecting to a DB instance .................................................................................................... 279
Finding the connection information .................................................................................. 279
Database authentication options...................................................................................... 282
Encrypted connections.................................................................................................... 283
Scenarios for accessing a DB instance ................................................................................ 283
Connecting to a DB instance running a specific DB engine ................................................... 283
Managing connections with RDS Proxy .............................................................................. 284
Working with option groups .................................................................................................... 285
Option groups overview .................................................................................................. 285
Creating an option group ................................................................................................ 286
Copying an option group ................................................................................................. 288
Adding an option to an option group ................................................................................ 289
Listing the options and option settings for an option group ................................................. 293
Modifying an option setting ............................................................................................ 294
Removing an option from an option group ........................................................................ 297
Deleting an option group ................................................................................................ 298
Working with parameter groups ............................................................................................... 301
Working with DB parameter groups .................................................................................. 303
Working with DB cluster parameter groups ........................................................................ 314
Comparing parameter groups ........................................................................................... 322
Specifying DB parameters ................................................................................................ 322
Managing a DB instance .................................................................................................................. 328
Stopping a DB instance ........................................................................................................... 329
Benefits......................................................................................................................... 330
Limitations..................................................................................................................... 330
Option and parameter group considerations ...................................................................... 330
Public IP address ............................................................................................................ 330
Stopping a DB instance ................................................................................................... 330
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Starting a DB instance ............................................................................................................ 332
Connecting an EC2 instance ..................................................................................................... 333
Overview....................................................................................................................... 333
Connecting an EC2 instance ............................................................................................. 336
Viewing connecting compute resources ............................................................................. 338
Modifying a DB instance .......................................................................................................... 340
Apply Immediately setting ............................................................................................... 341
Available settings........................................................................................................... 341
Modifying a Multi-AZ DB cluster ............................................................................................... 355
Apply Immediately setting ............................................................................................... 356
Available settings........................................................................................................... 356
Nonapplicable settings.................................................................................................... 365
Maintaining a DB instance ....................................................................................................... 366
Viewing pending maintenance .......................................................................................... 366
Applying updates........................................................................................................... 368
Maintenance for Multi-AZ deployments ............................................................................. 369
The maintenance window ................................................................................................ 370
Adjusting the maintenance window for a DB instance .......................................................... 371
Working with operating system updates ............................................................................ 372
Upgrading the engine version .................................................................................................. 376
Manually upgrading the engine version ............................................................................. 376
Automatically upgrading the minor engine version ............................................................. 378
Renaming a DB instance .......................................................................................................... 381
Renaming to replace an existing DB instance ..................................................................... 381
Renaming a Multi-AZ DB cluster ............................................................................................... 383
Renaming to replace an existing Multi-AZ DB cluster ........................................................... 383
Rebooting a DB instance ......................................................................................................... 385
Rebooting Multi-AZ DB clusters ................................................................................................ 387
Working with read replicas ...................................................................................................... 389
Overview....................................................................................................................... 391
Creating a read replica .................................................................................................... 394
Promoting a read replica ................................................................................................. 396
Monitoring read replication .............................................................................................. 399
Cross-Region read replicas ............................................................................................... 402
Tagging RDS resources ............................................................................................................ 411
Overview....................................................................................................................... 411
Using tags for access control with IAM .............................................................................. 412
Using tags to produce detailed billing reports .................................................................... 412
Adding, listing, and removing tags .................................................................................... 413
Using the AWS Tag Editor ............................................................................................... 415
Copying tags to DB instance snapshots ............................................................................. 415
Tutorial: Use tags to specify which DB instances to stop ...................................................... 416
Enabling backups........................................................................................................... 418
Working with ARNs ................................................................................................................. 421
Constructing an ARN ....................................................................................................... 421
Getting an existing ARN .................................................................................................. 425
Working with storage .............................................................................................................. 429
Increasing DB instance storage capacity ............................................................................ 429
Managing capacity automatically with storage autoscaling ................................................... 431
Modifying Provisioned IOPS settings ................................................................................. 435
I/O-intensive storage modifications .................................................................................. 437
Modifying General Purpose (gp3) settings .......................................................................... 437
Deleting a DB instance ............................................................................................................ 440
Deletion protection......................................................................................................... 440
Final snapshots and retained backups ............................................................................... 440
Deleting a DB instance .................................................................................................... 441
Deleting a Multi-AZ DB cluster................................................................................................. 443
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Using Blue/Green Deployments for database updates ......................................................................... 445
Overview of Amazon RDS Blue/Green Deployments .................................................................... 446
Benefits......................................................................................................................... 446
Workflow....................................................................................................................... 447
Authorizing access.......................................................................................................... 451
Considerations................................................................................................................ 451
Best practices................................................................................................................. 452
Region and version availability ......................................................................................... 453
Limitations..................................................................................................................... 453
Creating a blue/green deployment ........................................................................................... 454
Making changes in the green environment ......................................................................... 454
Handling lazy loading ..................................................................................................... 454
Creating the blue/green deployment ................................................................................ 455
Viewing a blue/green deployment ............................................................................................ 457
Switching a blue/green deployment ......................................................................................... 461
Switchover timeout......................................................................................................... 461
Switchover guardrails...................................................................................................... 462
Switchover actions.......................................................................................................... 462
Switchover best practices ................................................................................................ 463
Switching over a blue/green deployment .......................................................................... 463
After switchover............................................................................................................. 465
Deleting a blue/green deployment ........................................................................................... 465
Backing up and restoring a DB instance ............................................................................................ 468
Working with backups ............................................................................................................. 469
Backup storage.............................................................................................................. 469
Backup window.............................................................................................................. 470
Backup retention period .................................................................................................. 471
Enabling automated backups........................................................................................... 471
Retaining automated backups .......................................................................................... 473
Deleting retained automated backups ............................................................................... 475
Disabling automated backups.......................................................................................... 476
Using AWS Backup ......................................................................................................... 477
Unsupported MySQL storage engines ................................................................................ 477
Unsupported MariaDB storage engines .............................................................................. 478
Cross-Region automated backups ............................................................................................. 479
Region and version availability ......................................................................................... 479
Source and destination AWS Region support ...................................................................... 479
Enabling cross-Region automated backups ........................................................................ 481
Finding information about replicated backups .................................................................... 483
Point-in-time recovery from a replicated backup ................................................................ 486
Stopping backup replication ............................................................................................ 487
Deleting replicated backups ............................................................................................. 488
Creating a DB snapshot ........................................................................................................... 490
Creating a Multi-AZ DB cluster snapshot ................................................................................... 492
Restoring from a DB snapshot ................................................................................................. 494
Parameter groups........................................................................................................... 494
Security groups.............................................................................................................. 494
Option groups................................................................................................................ 495
Tagging......................................................................................................................... 495
Microsoft SQL Server ...................................................................................................... 495
Oracle Database............................................................................................................. 496
Restoring from a snapshot ............................................................................................... 496
Restoring from a snapshot to a Multi-AZ DB cluster .................................................................... 498
Restoring from a Multi-AZ DB cluster snapshot to a DB instance ................................................... 500
Copying a DB snapshot ........................................................................................................... 502
Limitations..................................................................................................................... 502
Snapshot retention......................................................................................................... 502
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Copying shared snapshots ............................................................................................... 502
Handling encryption....................................................................................................... 503
Incremental snapshot copying .......................................................................................... 503
Cross-Region copying...................................................................................................... 504
Option groups................................................................................................................ 507
Parameter groups........................................................................................................... 507
Copying a DB snapshot ................................................................................................... 508
Sharing a DB snapshot............................................................................................................ 516
Sharing public snapshots................................................................................................. 517
Sharing encrypted snapshots ........................................................................................... 518
Sharing a snapshot......................................................................................................... 520
Exporting DB snapshot data to Amazon S3 ................................................................................ 525
Region and version availability ......................................................................................... 525
Limitations..................................................................................................................... 525
Overview of exporting snapshot data ................................................................................ 526
Setting up access to an S3 bucket .................................................................................... 527
Exporting a DB snapshot ................................................................................................. 530
Monitoring snapshot exports ........................................................................................... 533
Canceling a snapshot export ............................................................................................ 534
Failure messages............................................................................................................ 535
Troubleshooting PostgreSQL permissions errors ................................................................. 536
File naming convention ................................................................................................... 536
Data conversion............................................................................................................ 537
Point-in-time recovery............................................................................................................. 543
Restoring a Multi-AZ DB cluster to a specified time ..................................................................... 546
Deleting a DB snapshot........................................................................................................... 549
Deleting a DB snapshot................................................................................................... 549
Tutorial: Restore a DB instance from a DB snapshot .................................................................... 551
Restoring a DB instance from a DB snapshot ...................................................................... 551
Monitoring metrics in a DB instance ................................................................................................. 554
Overview of monitoring .......................................................................................................... 555
Monitoring plan............................................................................................................. 555
Performance baseline...................................................................................................... 555
Performance guidelines................................................................................................... 555
Monitoring tools............................................................................................................. 556
Viewing instance status and recommendations ........................................................................... 559
Viewing Amazon RDS DB instance status ........................................................................... 560
Viewing Amazon RDS recommendations............................................................................ 564
Viewing metrics in the Amazon RDS console .............................................................................. 569
Monitoring RDS with CloudWatch ............................................................................................. 572
Overview of Amazon RDS and Amazon CloudWatch ............................................................ 573
Viewing CloudWatch metrics ............................................................................................ 574
Creating CloudWatch alarms ............................................................................................ 579
Tutorial: Creating a CloudWatch alarm for DB cluster replica lag ........................................... 580
Monitoring DB load with Performance Insights ........................................................................... 587
Overview of Performance Insights .................................................................................... 587
Turning Performance Insights on and off ........................................................................... 593
Turning on the Performance Schema for MariaDB or MySQL ................................................ 597
Performance Insights policies ........................................................................................... 600
Analyzing metrics with the Performance Insights dashboard ................................................ 603
Retrieving metrics with the Performance Insights API .......................................................... 628
Logging Performance Insights calls using AWS CloudTrail .................................................... 642
Monitoring the OS with Enhanced Monitoring ............................................................................ 644
Overview of Enhanced Monitoring .................................................................................... 644
Setting up and enabling Enhanced Monitoring ................................................................... 645
Viewing OS metrics in the RDS console ............................................................................. 649
Viewing OS metrics using CloudWatch Logs ....................................................................... 652
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RDS metrics reference ............................................................................................................. 653
CloudWatch metrics for RDS ............................................................................................ 653
CloudWatch dimensions for RDS...................................................................................... 660
CloudWatch metrics for Performance Insights .................................................................... 661
Counter metrics for Performance Insights .......................................................................... 662
SQL statistics for Performance Insights ............................................................................. 672
OS metrics in Enhanced Monitoring .................................................................................. 677
Monitoring events, logs, and database activity streams ....................................................................... 686
Viewing logs, events, and streams in the Amazon RDS console ..................................................... 686
Monitoring RDS events............................................................................................................ 690
Overview of events for Amazon RDS ................................................................................. 690
Viewing Amazon RDS events ............................................................................................ 691
Working with Amazon RDS event notification .................................................................... 694
Creating a rule that triggers on an Amazon RDS event ........................................................ 708
Amazon RDS event categories and event messages ............................................................. 712
Monitoring RDS logs............................................................................................................... 725
Viewing and listing database log files............................................................................... 725
Downloading a database log file ...................................................................................... 726
Watching a database log file ............................................................................................ 727
Publishing to CloudWatch Logs ........................................................................................ 728
Reading log file contents using REST ................................................................................ 730
MariaDB database log files.............................................................................................. 732
Microsoft SQL Server database log files ............................................................................ 741
MySQL database log files ................................................................................................ 745
Oracle database log files................................................................................................. 754
PostgreSQL database log files .......................................................................................... 761
Monitoring RDS API calls in CloudTrail ...................................................................................... 770
CloudTrail integration with Amazon RDS ........................................................................... 770
Amazon RDS log file entries............................................................................................ 770
Monitoring Oracle with Database Activity Streams ...................................................................... 774
Overview....................................................................................................................... 774
Configuring Oracle unified auditing.................................................................................. 777
Starting a database activity stream ................................................................................... 777
Modifying a database activity stream ................................................................................ 779
Getting the activity stream status ..................................................................................... 781
Stopping a database activity stream ................................................................................. 782
Monitoring activity streams ............................................................................................. 783
Managing access to activity streams .................................................................................. 797
Working with Amazon RDS Custom .................................................................................................. 800
Database customization challenge............................................................................................ 800
RDS Custom management model and benefits ........................................................................... 801
Shared responsibility model ............................................................................................. 801
Key benefits of RDS Custom ............................................................................................ 803
RDS Custom architecture ......................................................................................................... 803
VPC.............................................................................................................................. 804
Amazon S3.................................................................................................................... 804
AWS CloudTrail.............................................................................................................. 805
RDS Custom automation and monitoring ........................................................................... 805
Security considerations for RDS Custom .................................................................................... 807
Working with RDS Custom for Oracle ........................................................................................ 808
RDS Custom for Oracle workflow ..................................................................................... 808
RDS Custom for Oracle requirements and limitations .......................................................... 811
Setting up your RDS Custom for Oracle environment .......................................................... 813
Working with CEVs for RDS Custom for Oracle ................................................................... 826
Configuring an RDS Custom for Oracle DB instance ............................................................ 852
Managing an RDS Custom for Oracle DB instance ............................................................... 861
Working with RDS Custom for Oracle replicas .................................................................... 872
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Backing up and restoring an RDS Custom for Oracle DB instance .......................................... 877
Upgrading a DB instance for RDS Custom for Oracle ........................................................... 884
Working with RDS Custom for SQL Server ................................................................................. 889
RDS Custom for SQL Server workflow ............................................................................... 889
RDS Custom for SQL Server requirements and limitations .................................................... 891
Setting up your RDS Custom for SQL Server environment .................................................... 893
Working with CEVs for RDS Custom for SQL Server ............................................................. 906
Creating and connecting to an RDS Custom for SQL Server DB instance ................................. 918
Managing an RDS Custom for SQL Server DB instance ......................................................... 926
Backing up and restoring an RDS Custom for SQL Server DB instance .................................... 935
Migrating an on-premises database to RDS Custom for SQL Server ....................................... 943
Upgrading a DB instance for RDS Custom for SQL Server ..................................................... 946
Troubleshooting RDS Custom ................................................................................................... 947
Viewing RDS Custom events ............................................................................................ 947
Subscribing to event notifications ..................................................................................... 947
Troubleshooting CEV creation .......................................................................................... 948
Troubleshooting CEV errors for RDS Custom for SQL Server ................................................. 949
Support perimeter and unsupported configurations ............................................................ 951
Fixing unsupported configurations .................................................................................... 952
How Amazon RDS Custom replaces an impaired host .......................................................... 957
Troubleshooting RDS Custom for Oracle upgrade issues ...................................................... 959
Troubleshooting RDS Custom for Oracle replica promotion .................................................. 960
Working with RDS on AWS Outposts ................................................................................................. 961
Prerequisites.......................................................................................................................... 962
Support for Amazon RDS features ............................................................................................ 963
Supported DB instance classes ................................................................................................. 966
Customer-owned IP addresses .................................................................................................. 968
Using CoIPs................................................................................................................... 968
Limitations..................................................................................................................... 969
Multi-AZ deployments............................................................................................................. 970
Working with the shared responsibility model .................................................................... 970
Improving availability...................................................................................................... 970
Prerequisites.................................................................................................................. 971
Working with API operations for Amazon EC2 permissions ................................................... 972
Creating DB instances for RDS on Outposts ............................................................................... 973
Creating read replicas for RDS on Outposts ............................................................................... 980
Considerations for restoring DB instances .................................................................................. 982
Using RDS Proxy ............................................................................................................................ 983
Region and version availability ................................................................................................. 983
Quotas and limitations............................................................................................................ 984
RDS for MariaDB limitations ............................................................................................. 984
RDS for SQL Server limitations ......................................................................................... 985
MySQL limitations.......................................................................................................... 985
PostgreSQL limitations.................................................................................................... 986
Planning where to use RDS Proxy ............................................................................................. 986
RDS Proxy concepts and terminology ........................................................................................ 987
Overview of RDS Proxy concepts ...................................................................................... 987
Connection pooling......................................................................................................... 988
Security......................................................................................................................... 989
Failover......................................................................................................................... 990
Transactions................................................................................................................... 991
Getting started with RDS Proxy ................................................................................................ 991
Setting up network prerequisites ...................................................................................... 991
Setting up database credentials in Secrets Manager ............................................................ 993
Setting up IAM policies ................................................................................................... 995
Creating an RDS Proxy .................................................................................................... 997
Viewing an RDS Proxy ................................................................................................... 1000
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Description:Amazon's trademarks and trade dress may not be used in connection with any product or service that is not Amazon's, in any manner that is likely to cause confusion among customers, or in any manner that disparages or discredits Amazon. All other trademarks not owned by Amazon are the property of