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stats collection on DG affects standby database

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billo102

Technical User
Mar 2, 2009
31
GB
HI
We implemented active dataguard on an 11.2.0.2 database. We have a weekly stats collection job that runs against the primary node and gathers stats on select schemas

dbms_stats.gather_schema_stats

There are certain queries that subsequently hang when running against the read-only standby database (the whole database then hangs). To fix it we restart the standby database and the queries run fine. The queries will be fine until the next time the stats collection job runs and the same issue occurs.

any ideas as to what is happening here ? Why do we need to restart the standby database after stats collection in order to fix the issue?
 
  have a weekly stats collection job that gathers stats on several schemas dbms_stats.gather_schema_stats
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