| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com> |
| Cc: | Andrew McMillan <andrew(at)catalyst(dot)net(dot)nz>, huang yaqin <hyq(at)gthome(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: good pc but bad performance,why? |
| Date: | 2004-04-07 22:12:38 |
| Message-ID: | 200404072212.i37MCck07003@candle.pha.pa.us |
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| Lists: | pgsql-performance |
scott.marlowe wrote:
> > One thing I recommend is to use ext2 (or almost anything but ext3).
> > 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.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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