Oracle中常见的33个等待事件小结

NAME

----------------------------------------------------------------

latch activity

latch free

latch: Change Notification Hash table latch

latch: In memory undo latch

latch: MQL Tracking Latch

latch: PX hash array latch

latch: Undo Hint Latch

latch: WCR: processes HT

latch: WCR: sync

latch: cache buffer handles

latch: cache buffers chains

latch: cache buffers lru chain

latch: call allocation

latch: change notification client cache latch

latch: checkpoint queue latch

latch: enqueue hash chains

latch: gc element

latch: gcs resource hash

latch: ges resource hash list

latch: lob segment dispenser latch

latch: lob segment hash table latch

latch: lob segment query latch

latch: messages

latch: object queue header operation

latch: parallel query alloc buffer

latch: redo allocation

latch: redo copy

latch: redo writing

latch: row cache objects

latch: session allocation

latch: shared pool

latch: undo global data

latch: virtual circuit queues

已选择33行。

10gr2 rac:

sys@ORCL> select name from v$event_name where name like 'latch%' order by 1;

NAME

--------------------------------------------------

latch activity

latch free

latch: Change Notification Hash table latch

latch: In memory undo latch

latch: KCL gc element parent latch

latch: MQL Tracking Latch

latch: Undo Hint Latch

latch: cache buffer handles

latch: cache buffers chains

latch: cache buffers lru chain

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