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chore(rds): notes about maintenance windows

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Michele Cereda
2024-09-23 20:36:45 +02:00
parent 588a69f2d0
commit 20fe9d609e
2 changed files with 13 additions and 4 deletions
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knowledge base/cloud computing/aws/rds.md
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@@ -99,6 +99,13 @@ One can choose any of the following retention periods for instances' Performance
- _n_ months, where n is a number from 1 to 24.<br/>
In CLI and IaC, this number must be _n*31_.
Each and every DB instance has a 30-minutes weekly maintenance window defining when modifications and software patching
occur. Should it not be defined during creation, one will be assigned automatically at random from the default time
block for the region.<br/>
If any maintenance event is scheduled before the window, it's **initiated** in that time frame. Most maintenance events
complete during the 30-minute maintenance window, while larger events may take more.<br/>
Maintenance windows are paused when their DB instances are stopped.
## Engine
### PostgreSQL
@@ -114,10 +121,10 @@ enhance performance depending on the engine selected and the amount of storage r
| DB engine | Storage size | Number of volumes provisioned |
| -------------------------------- | ----------------- | ----------------------------- |
| Db2 | Less than 400 GiB | 1 |
| Db2 | 400 to 65,536 GiB | 4 |
| MariaDB<br/>MySQL<br/>PostgreSQL | Less than 400 GiB | 1 |
| MariaDB<br/>MySQL<br/>PostgreSQL | 400 to 65,536 GiB | 4 |
| Db2 | Less than 400 GiB | 1 |
| Db2 | 400 to 65,536 GiB | 4 |
| Oracle | Less than 200 GiB | 1 |
| Oracle | 200 to 65,536 GiB | 4 |
| SQL Server | Any | 1 |
@@ -211,7 +218,7 @@ require more time than allotted to the backup window, they will continue after t
Backups are retained for up to 35 days (_backup retention period_).<br/>
One can recover DB instances to **any** point in time that sits inside the backup retention period.
The backup window can't overlap with the weekly maintenance window for DB instance or Multi-AZ DB cluster.<br/>
The backup window **must not overlap** with the weekly maintenance window for DB instance or Multi-AZ DB cluster.<br/>
During automatic backup windows storage I/O might be suspended briefly while the backup process initializes.
Initialization typically takes up to a few seconds. One might also experience elevated latencies for a few minutes
during backups for Multi-AZ deployments.<br/>
@@ -714,6 +721,7 @@ Solution: reboot the source and target instance and retry.
- [Backing up login roles aka users and group roles]
- [Renaming a DB instance]
- [Amazon RDS DB instances]
- [Maintaining a DB instance]
<!--
Reference
@@ -733,6 +741,7 @@ Solution: reboot the source and target instance and retry.
[how can i resolve the "error: <module/extension> must be loaded via shared_preload_libraries" error?]: https://repost.aws/knowledge-center/rds-postgresql-resolve-preload-error
[importing data into postgresql on amazon rds]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/PostgreSQL.Procedural.Importing.html
[introduction to backups]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html
[maintaining a db instance]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_UpgradeDBInstance.Maintenance.html
[migrating databases to their amazon rds equivalents with aws dms]: https://docs.aws.amazon.com/dms/latest/userguide/data-migrations.html
[migrating databases using rds postgresql transportable databases]: https://aws.amazon.com/blogs/database/migrating-databases-using-rds-postgresql-transportable-databases/
[pricing and data retention for performance insights]: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PerfInsights.Overview.cost.html