PGA_AGGREGATE_TARGET sizing of work areas and HJ cost
Date: Fri, 29 May 2009 18:14:31 +0200
I'm doing some investigations
because of query plan changing in the same session (from NL Index RS to HJ FTS), and got question about Hash_Join_Area_Size when work_area_policy=auto.
Is that possible that the same session can have different HJAS for same query ?
When auto pga allocation is in place its quite possible in my opinion. Looks like depending on instance workload (in PGA terms) some queries may switch between NL Index RS and HJ FTS in the same session. I'm on 18.104.22.168 .
GG Received on Fri May 29 2009 - 11:14:31 CDT