# 使用 RDS for PostgreSQL 的等待事件进行优化
<a name="PostgreSQL.Tuning"></a>

等待事件是 RDS for PostgreSQL 的重要优化工具。当您能查明会话为什么在等待资源以及会话在做什么时，您就能更好地减少瓶颈。您可以使用本节中的信息来查找可能的原因和纠正措施。本节还讨论基本的 PostgreSQL 优化概念。

本节中的等待事件特定于 RDS for PostgreSQL。

**Topics**
+ [RDS for PostgreSQL 优化的基本概念](PostgreSQL.Tuning.concepts.md)
+ [RDS for PostgreSQL 等待事件](PostgreSQL.Tuning.concepts.summary.md)
+ [Client:ClientRead](wait-event.clientread.md)
+ [Client:ClientWrite](wait-event.clientwrite.md)
+ [CPU](wait-event.cpu.md)
+ [IO:BufFileRead 和 IO:BufFileWrite](wait-event.iobuffile.md)
+ [IO:DataFileRead](wait-event.iodatafileread.md)
+ [IO:WALWrite](wait-event.iowalwrite.md)
+ [IPC:并行等待事件](rpg-ipc-parallel.md)
+ [IPC:ProcArrayGroupUpdate](apg-rpg-ipcprocarraygroup.md)
+ [Lock:advisory](wait-event.lockadvisory.md)
+ [Lock:extend](wait-event.lockextend.md)
+ [Lock:Relation](wait-event.lockrelation.md)
+ [Lock:transactionid](wait-event.locktransactionid.md)
+ [Lock:tuple](wait-event.locktuple.md)
+ [LWLock:BufferMapping (LWLock:buffer\$1mapping)](wait-event.lwl-buffer-mapping.md)
+ [LWLock:BufferIO (IPC:BufferIO)](wait-event.lwlockbufferio.md)
+ [LWLock:buffer\$1content (BufferContent)](wait-event.lwlockbuffercontent.md)
+ [LWLock:lock\$1manager (LWLock:lockmanager)](wait-event.lw-lock-manager.md)
+ [LWLock:pg\$1stat\$1statements](apg-rpg-lwlockpgstat.md)
+ [LWLock:SubtransSLRU (LWLock:SubtransControlLock)](wait-event.lwlocksubtransslru.md)
+ [Timeout:PgSleep](wait-event.timeoutpgsleep.md)
+ [Timeout:VacuumDelay](wait-event.timeoutvacuumdelay.md)