| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Latest version of Hot Standby patch |
| Date: | 2009-01-14 08:12:17 |
| Message-ID: | 1231920737.28919.82.camel@ebony.2ndQuadrant |
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| Thread: | |
| Lists: | pgsql-hackers |
On Wed, 2009-01-14 at 08:27 +0200, Heikki Linnakangas wrote:
> Thanks for picking this up, despite my report was so vague.
>
> Simon Riggs wrote:
> > Best way seems to be to do (almost) the same thing as ExtendSubtrans()
> > during recovery, so we zero out pages at the point that recovering
> > transactions get written to pg_subtrans.
>
> Yep.
>
> Do we have the same bug with ExtendCLOG?
No, the clog issues WAL records for that. 8 times less than subtrans
would if we allowed it to, so its not as bad performance wise either.
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Training, Services and Support
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