From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Greg Smith <gsmith(at)gregsmith(dot)com> |
Cc: | pgsql-patches(at)postgresql(dot)org |
Subject: | Re: Automatic adjustment of bgwriter_lru_maxpages |
Date: | 2007-05-14 13:52:30 |
Message-ID: | 9814.1179150750@sss.pgh.pa.us |
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Lists: | pgsql-hackers pgsql-patches pgsql-performance |
Greg Smith <gsmith(at)gregsmith(dot)com> writes:
> Since the whole background writer setup is kind of complicated, the other
> thing I was working on is writing a guide on how to use the new
> pg_stat_bgwriter information to figure out if you need to increase
> bgwriter_[all|lru]_pages (and the other parameters too). It makes it much
> easier to write that if you can say "You can safely set
> bgwriter_lru_maxpages high because it only writes what it needs to based
> on your usage".
If you can write something like that, why do we need the parameter at all?
regards, tom lane
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