resetlogs開庫遇到enq: DM,resetlogsenq

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resetlogs開庫遇到enq: DM,resetlogsenq

最近遇到案例,10.2.0.5.12下的db, alter database open resetlogs 命令一直等待,alert_sid.log 的資訊為:

setting recovery target incarnation to  2

 

從v$session.event 得到的等待事件為enq: DM - contention

 

從 select  KSQSTTYP,KSQSTEXPL  from x$ksqst where KSQSTTYP='DM' 可以看到 對該等待事件的解釋為:

Enqueue held by foreground or DBWR to syncrhonize database mount/open with other operations

 

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