| From: | "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com> |
|---|---|
| To: | Doug McNaught <doug(at)mcnaught(dot)org> |
| Cc: | Henrik Steffen <steffen(at)city-map(dot)de>, Steve Wolfe <nw(at)codon(dot)com>, <pgsql-general(at)postgresql(dot)org>, <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Upgrade to dual processor machine? |
| Date: | 2002-11-14 19:58:41 |
| Message-ID: | Pine.LNX.4.33.0211141257410.1942-100000@css120.ihs.com |
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| Thread: | |
| Lists: | pgsql-general pgsql-performance |
On 14 Nov 2002, Doug McNaught wrote:
> "Henrik Steffen" <steffen(at)city-map(dot)de> writes:
>
> > hi steve,
> >
> > why fsync? - what's fsync? never heard of it... google tells
> > me something about syncing of remote hosts ... so why should I
> > activate it ?? ... I conclude, it's probably disabled because
> > I don't know what it is ....
>
> fsync() is a system call that flushes a file's contents from the
> buffer cache to disk. PG uses it to ensure consistency in the WAL
> files. It is enabled by default. Do NOT disable it unless you know
> exactly what you are doing and are prepared to sacrifice some data
> integrity for performance.
I thought the danger with WAL was minimized to the point of not being an
issue anymore. Tom?
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