| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Hannu Krosing <hannu(at)skype(dot)net> |
| Cc: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Is full_page_writes=off safe in conjunction with |
| Date: | 2006-04-18 12:44:32 |
| Message-ID: | 200604181244.k3ICiWA19203@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Hannu Krosing wrote:
> ?hel kenal p?eval, E, 2006-04-17 kell 17:14, kirjutas Bruce Momjian:
> > Jim C. Nasby wrote:
> > > Are you going to back-patch this? If I understand correctly current
> > > behavior could mean people using PITR may have invalid backups. In the
> > > meantime, perhaps we should send an email to -annouce recommending that
> > > folks issue a CHEKCPOINT; after pg_start_backup and before initiating
> > > the filesystem copy.
> >
> > We are disabling full_page_writes for 8.1.4, so they should be fine.
>
> Except that people currently using full_page_writes=off on 8.1 may see a sudden
> drop in performance after upgrading.
Yea, but if it can cause corruption, we have no choice. It will be
mentioned in the release notes.
> Do you have an estimate, how big the impact is ?
Nope.
--
Bruce Momjian http://candle.pha.pa.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +
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