Tom Lane wrote:
> Arjen van der Meijden told me that according to the tweakers.net
> benchmark, HEAD is noticeably slower than 8.2.4, and I soon confirmed
> here that for small SELECT queries issued as separate transactions,
> there's a significant difference. I think much of the difference stems
> from the fact that we now have stats_row_level ON by default, and so
> every transaction sends a stats message that wasn't there by default
> in 8.2. When you're doing a few thousand transactions per second
> (not hard for small read-only queries) that adds up.
So, did this patch make the performance problem go away?
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Alvaro Herrera http://www.CommandPrompt.com/
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