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After upgrading to 8.2.3 INSERTs and UPDATEs on one of my tables became incredibly slow. I traced the problem to one of my triggers that calls one of my defined functions (that is IMMUTABLE). If I inline the function instead of calling it the runtime for my test update drops from 10261.234 ms to 564.094 ms. The time running the trigger itself dropped from 9749.910 to 99.504.
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Horrible trigger performance after upgrade 8.0.12 -> 8.2.3
- From: Joseph S <jks(at)selectacast(dot)net>
- To: pgsql-performance(at)postgresql(dot)org
- Subject: Horrible trigger performance after upgrade 8.0.12 -> 8.2.3
- Date: Tue, 20 Mar 2007 15:26:33 -0400
After upgrading to 8.2.3 INSERTs and UPDATEs on one of my tables became incredibly slow. I traced the problem to one of my triggers that calls one of my defined functions (that is IMMUTABLE). If I inline the function instead of calling it the runtime for my test update drops from 10261.234 ms to 564.094 ms. The time running the trigger itself dropped from 9749.910 to 99.504.
BTW does make any sense to bother marking trigger functions as STABLE or IMMUTABLE?
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