High Availability Data Guard, Sharding and Global Data Services (MOSC)

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Which is "inst 1"?

edited Aug 31, 2017 5:00AM in High Availability Data Guard, Sharding and Global Data Services (MOSC) 2 commentsAnswered

We set up a 10g DataGuard configuration with 1 primary database (say, "chicago") and 1 physical standby (say, "boston").

Log transport and apply work fine, but ever so often, alert_dsboston.log reports this:

Sun Aug 06 20:16:34 EDT 2017Errors in file /home/oracle/base/product/10.2.0/dbhome_2/rdbms/log/dsboston_arc0_16725.trc:ORA-00494: enqueue [CF] held for too long (more than 900 seconds) by 'inst 1, osid 30194'Sun Aug 06 20:17:04 EDT 2017System State dumped to trace file /home/oracle/base/product/10.2.0/dbhome_2/rdbms/log/dsboston_arc0_16725.trcKilling enqueue blocker (pid=30194) on resource CF-00000000-00000000 by terminating the processSun Aug 06 20:17:04 EDT 2017Attempt to get Control File Enqueue by ARC0 pid=16725 (mode=S, type=0, timeout=300) is being blocked by inst=1, pid=30194Please check inst 1's alert log for more information on the blocker including a possible ORA-00494 and related incident logs

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