| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
| Cc: | Gavin Sherry <swm(at)linuxworld(dot)com(dot)au>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Bgwriter behavior |
| Date: | 2004-12-23 16:05:35 |
| Message-ID: | 29075.1103817935@sss.pgh.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> I remember the other difference between 8.0 and pre-8.0. When a backend
> has to write a block in 8.0, it does a write _plus_ fsync(), while in
> pre-8.0 it did only a write. There was a proposal to pass backend write
> information to the background writer so it would know to fsync at
> checkpoint, but it was decided that backend writing would be rare. I
> think we have to rethink that assumption.
No, just read the code. The above assertions are all wet.
regards, tom lane
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