| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Cédric Villemain <cedric(dot)villemain(dot)debian(at)gmail(dot)com> |
| Cc: | Bruce Momjian <bruce(at)momjian(dot)us>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Simon Riggs <simon(at)2ndQuadrant(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: ALTER TABLE SET STATISTICS requires AccessExclusiveLock |
| Date: | 2010-07-08 01:37:08 |
| Message-ID: | 4C352BC4.3060604@agliodbs.com |
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| Lists: | pgsql-hackers |
On 7/7/10 6:04 PM, Cédric Villemain wrote:
> I just faced production issue where it is impossible to alter table to
> adjust autovacuum settings in a pg8.4. (5K tps, 260M rows table, lock
> too much)
We could try to resolve the COMMENT ON issue with the same mechanism.
What we need is a table lock which blocks other DDL statements, but not DML.
--
-- Josh Berkus
PostgreSQL Experts Inc.
http://www.pgexperts.com
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