| From: | Curt Sampson <cjs(at)cynic(dot)net> |
|---|---|
| To: | "Mikheev, Vadim" <VMIKHEEV(at)sectordata(dot)com> |
| Cc: | 'Bruce Momjian' <pgman(at)candle(dot)pha(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: WAL replay logic (was Re: [PERFORM] Mount options f |
| Date: | 2003-02-19 02:53:22 |
| Message-ID: | Pine.NEB.4.51.0302191151120.5947@angelic-vtfw.cvpn.cynic.net |
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| Lists: | pgsql-hackers |
On Tue, 18 Feb 2003, Mikheev, Vadim wrote:
> > > So if you do this, do you still need to store that information in
> > > pg_control at all?
>
> Yes: to "speeds up the recovery process".
If it's going to slow down the performance of my database when not doing
recovery (because I have to write two files for every transaction,
rather than one), I couldn't care less about speeding up the recovery
process.
As far as Bruce's question goes, what kind of corruption can happen to
the log files? We write a full block at a time, I guess, so it might
make sense to checksum it to verify that the block was not partially
written.
cjs
--
Curt Sampson <cjs(at)cynic(dot)net> +81 90 7737 2974 http://www.netbsd.org
Don't you know, in this new Dark Age, we're all light. --XTC
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