Re: understanding bitmap index benefit

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>
Cc: Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: understanding bitmap index benefit
Date: 2005-05-19 16:29:42
Message-ID: 4406.1116520182@sss.pgh.pa.us
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Oleg Bartunov <oleg(at)sai(dot)msu(dot)su> writes:
> I tried to see io statistics, but it was weird in 8.0X and in 8.1dev I still
> don't understand it :)

We aren't yet updating the io statistics for bitmap scans properly.
There was a thread about this but it petered out without any resolution
about what we should do ...

regards, tom lane

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