Re: good pc but bad performance,why?

Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > scott.marlowe wrote:
> >>> There is no real need (or benefit) from having the database on a
> >>> journalled filesystem - the journalling is only trying to give similar
> >>> sorts of guarantees to what the fsync in PostgreSQL is doing.
> >>
> >> Is this true?  I was under the impression that without at least meta-data
> >> journaling postgresql could still be corrupted by power failure.
>
> > It is false.  ext2 isn't crash-safe, and PostgreSQL needs an intact file
> > system for WAL recovery.
>
> 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.

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