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Re: performance on new linux box - Mailing list pgsql-performance

From Ryan Wexler
Subject Re: performance on new linux box
Date
Msg-id AANLkTimx5Ug2iAQLv3l5scscART_6fm-wCl10k1nWyti@mail.gmail.com
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In response to Re: performance on new linux box  (Jochen Erwied <jochen@pgsql-performance.erwied.eu>)
Responses Re: performance on new linux box  (Ben Chobot <bench@silentmedia.com>)
Re: performance on new linux box  ("Kevin Grittner" <Kevin.Grittner@wicourts.gov>)
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On Thu, Jul 8, 2010 at 12:32 PM, Jochen Erwied <jochen@pgsql-performance.erwied.eu> wrote:
Thursday, July 8, 2010, 9:18:20 PM you wrote:

> However, I just verified with the hosting company that BBU is off on the
> raid controller.  I am trying to find out my options, turn it on, different
> card, etc...

Turning it on requires the external BBU to be installed, so even if a 9650
has BBU support, it requires the hardware on a pluggable card.

And even If the BBU is present, it requires to pass the selftest once until
you are able to turn on write caching.


--
Jochen Erwied     |   home: jochen@erwied.eu     +49-208-38800-18, FAX: -19
Sauerbruchstr. 17 |   work: joe@mbs-software.de  +49-2151-7294-24, FAX: -50
D-45470 Muelheim  | mobile: jochen.erwied@vodafone.de       +49-173-5404164


One thing I don't understand is why BBU will result in a huge performance gain.  I thought BBU was all about power failures?

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