"Hannu Krosing" <hannu@skype.net> wrote
>
> Could anybody tell me what is the smallest working page size for
> postgresql ?
>
> I have a table where access is highly random over huge table getting
> usually only one small tuple from each page. One way to get more
> performance could be using smaller page size, so the per-tuple read
> overhead would be smaller.
>
> Would 4k pages work ? what about 2k and 1k ? 512bytes ?
>
> What would it take, to make only heap pages small and keep index pages
> larger ? Probably at least per-tablespace or per-pagesize split shared
> buffer space and changes in caching algorithms ?
>
I recall there was a discussion several weeks ago:
http://archives.postgresql.org/pgsql-performance/2005-12/msg00120.php
I bet block size less than 512 won't bring you any benefits, since that's
the physical disk sector size limit.
Regards,
Qingqing