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Home > Success Center > Archive > 2017December14 - Deletes > Where is the Blocking tab on a 10g RAC cluster?

Where is the Blocking tab on a 10g RAC cluster?

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Created by Interspire Import, last modified by Jessica Solis on Dec 14, 2017

Views: 684 Votes: 0 Revisions: 10

If the monitored database is a 10g RAC cluster, there is an Oracle bug that prevents DPA from collecting blocking or locking information. DPA gathers this information from the V$SESSION.BLOCKING_SESSION column, and on a 10g RAC cluster, this query may hang. When it hangs, it does so for 60 seconds, and waits on a wait event named "DIAG Idle Event."

Because of this issue, DPA recognizes a 10g RAC cluster and turns the blocking/locking feature off.  There is no workaround.

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