Re: Performance bug in prepared statement binding in 9.2? - Mailing list pgsql-performance

From Josh Berkus
Subject Re: Performance bug in prepared statement binding in 9.2?
Date
Msg-id 51FAA1B8.6040809@agliodbs.com
Whole thread Raw
In response to Performance bug in prepared statement binding in 9.2?  (Josh Berkus <josh@agliodbs.com>)
Responses Re: Performance bug in prepared statement binding in 9.2?
List pgsql-performance
Amit, All:

So we just retested this on 9.3b2.  The performance is the same as 9.1
and 9.2; that is, progressively worse as the test cycles go on, and
unacceptably slow compared to 8.4.

Some issue introduced in 9.1 is causing BINDs to get progressively
slower as the PARSEs BINDs get run repeatedly.  Per earlier on this
thread, that can bloat to 200X time required for a BIND, and it's
definitely PostgreSQL-side.

I'm trying to produce a test case which doesn't involve the user's
application.  However, hints on other things to analyze would be keen.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com


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