| From: | Ilya Kosmodemiansky <ilya(dot)kosmodemiansky(at)postgresql-consulting(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, Robert Kaye <rob(at)musicbrainz(dot)org>, Josh Krupka <jkrupka(at)gmail(dot)com>, PostgreSQL Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: MusicBrainz postgres performance issues |
| Date: | 2015-03-15 17:54:51 |
| Message-ID: | CAG95seV8cGYuE-EpW4g8UdSEWFUXBe3eUXcf8QMUgNc1GB1uoQ@mail.gmail.com |
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| Lists: | pgsql-performance |
On Sun, Mar 15, 2015 at 8:46 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:
> That imo doesn't really have anything to do with it. The primary benefit
> of a BBU with writeback caching is accelerating (near-)synchronous
> writes. Like the WAL.
My point was, that having no proper raid controller (today bbu surely
needed for the controller to be a proper one) + heavy writes of any
kind, it is absolutely impossible to live with large shared_buffers
and without io problems.
>
> Greetings,
>
> Andres Freund
>
> --
> Andres Freund http://www.2ndQuadrant.com/
> PostgreSQL Development, 24x7 Support, Training & Services
--
Ilya Kosmodemiansky,
PostgreSQL-Consulting.com
tel. +14084142500
cell. +4915144336040
ik(at)postgresql-consulting(dot)com
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