| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
| Cc: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com>, Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>, Gregory Stark <stark(at)enterprisedb(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: HOT patch - version 15 |
| Date: | 2007-09-06 19:32:07 |
| Message-ID: | 1057.1189107127@sss.pgh.pa.us |
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| Lists: | pgsql-patches |
Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> Heikki Linnakangas escribi:
>> and the removed tuples need to be WAL-logged.
> Is this a problem for bgwriter?
bgwriter does checkpoints, which emit WAL records; and they also call
GetOldestXmin. So we know a-priori that those two things work. There
may be some other showstopper but I'm not sure what it would be.
regards, tom lane
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