| From: | "Emre Hasegeli" <emre(dot)hasegeli(at)tart(dot)com(dot)tr> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org, pgsql <pgsql-general(at)postgresql(dot)org> |
| Cc: | dba(at)tart(dot)com(dot)tr |
| Subject: | Re: PostgreSQL 9.2.3 performance problem caused Exclusive locks |
| Date: | 2013-03-12 19:17:33 |
| Message-ID: | op.wtuk7jp4k2xoe5@localhost.localdomain |
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| Lists: | pgsql-general pgsql-performance |
2013-03-08 13:27:16 +0200 Emre Hasegeli <emre(dot)hasegeli(at)tart(dot)com(dot)tr>:
> PostgreSQL writes several following logs during the problem which I never
> saw before 9.2.3:
>
> LOG: process 4793 acquired ExclusiveLock on extension of relation
> 305605 of database 16396 after 2348.675 ms
I tried
* to downgrade to 9.2.2
* to disable autovacuum
* to disable synchronous commit
* to write less on the big tables
* to increase checkpoint segments
* to increase max connections
* to move pg_xlog to sepe
None of them helps to avoid downtimes. I could not find anything related
to it? Do you have any idea? Have you ever experience something like this?
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