| From: | Heikki Linnakangas <heikki(at)enterprisedb(dot)com> |
|---|---|
| To: | Kenneth Marshall <ktm(at)it(dot)is(dot)rice(dot)edu> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Gregory Stark <stark(at)enterprisedb(dot)com>, Russell Smith <mr-russ(at)pws(dot)com(dot)au>, Darcy Buskermolen <darcyb(at)commandprompt(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, "Matthew T(dot) O'Connor" <matthew(at)zeut(dot)net>, Pavan Deolasee <pavan(at)enterprisedb(dot)com>, Christopher Browne <cbbrowne(at)acm(dot)org>, pgsql-general(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [HACKERS] Autovacuum Improvements |
| Date: | 2007-01-22 19:24:20 |
| Message-ID: | 45B50F64.6060700@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-general pgsql-hackers |
Kenneth Marshall wrote:
> On Mon, Jan 22, 2007 at 06:42:09PM +0000, Simon Riggs wrote:
>> Hold that thought! Read Heikki's Piggyback VACUUM idea on new thread...
>
> There may be other functions that could leverage a similar sort of
> infrastructure. For example, a long DB mining query could be registered
> with the system. Then as the pieces of the table/database are brought in
> to shared memory during the normal daily DB activity they can be acquired
> without forcing the DB to run a very I/O expensive query when waiting a
> bit for the results would be acceptable. As long as we are thinking
> piggyback.
Yeah, I had the same idea when we discussed synchronizing sequential
scans. The biggest difference is that with queries, there's often a user
waiting for the query to finish, but with vacuum we don't care so much
how long it takes.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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