I think what would be helpful here next is a self-contained benchmarking script. You posted an outline of what you did for the original version at http://archives.postgresql.org/message-id/cabrt9rc-1wgxzc_z5mwkdk70fgy2drx3slxzdp4vobkukpz...@mail.gmail.com

It doesn't sound like it would be hard to turn that into a little shell script. I'd rather see one from you mainly so I don't have to worry about whether I duplicated your procedure correctly or not. Don't even worry about "best of 3", just run it three times, grep out the line that shows the TPS number, and show them all. One of the first questions I have is whether the performance changed between there and your v5. A self-contained and fully automated performance test case would ease review, and give some performance regression testing for other suggested changes to use as a reference.

Greg Smith   2ndQuadrant US    g...@2ndquadrant.com   Baltimore, MD
PostgreSQL Training, Services, and 24x7 Support  www.2ndQuadrant.us

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