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Enq Us contention

649758Jul 13 2008

Hi ,
I am getting Enq Us contention as top wait event continuosly in one of my RAC database. and 2nd top wait event is DFS file handel.
Could any body expalin me this wait event and solution to minimize this wait event.

My db size 70GB
Undo tablespace is 1.5GB with autoextend on
undo retion =900

SGA_ATRGET =2.5GB

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Locked on Aug 10 2008

Added on Jul 13 2008

#advanced-queueing, #database-key-features

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