Re: good pc but bad performance,why?

On Thu, 2004-04-08 at 14:13, Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Tom Lane wrote:
> >> But it should be okay to set the filesystem to journal only its own
> >> metadata. There's no need for it to journal file contents.
>
> > Can you set ext2 to journal metadata? I didn't know it could do that.
>
> No, ext2 has no journal at all AFAIK. But I believe ext3 has an option
> to journal or not journal file contents, and at least on a Postgres-only
> volume you'd want to turn that off.

No, it certainly doesn't.

To be honest I was not aware that PostgreSQL was susceptible to failure
on non[metadata] journalled filesystems - I was [somewhat vaguely] of
the understanding that it would work fine on any filesystem.

And obviously, from my original post, we can see that I believed
metadata journalling was wasted on it.

Is the 'noatime' option worthwhile? Are you saying that PostgreSQL
should always be run on a metadata journalled filesystem then, and that
VFAT, ext2, etc are ++ungood?

Thanks,
Andrew McMillan.

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