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From: Craig Ringer <craig@2ndQuadrant.com>
To: Evgeny Shishkin <itparanoia@gmail.com>
Cc: Niels Kristian Schjødt <nielskristian@autouncle.com>
Cc: Jeff Janes <jeff.janes@gmail.com>
Cc: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Do I have a hardware or a software problem?
Date: Wed, 12 Dec 2012 10:47:51 +0800
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On 12/12/2012 10:13 AM, Evgeny Shishkin wrote:
>
> Yes, i am aware of this issue. Never experienced this neither on intel
> 520, no ocz vertex 3.
>

I wouldn't trust either of those drives. The 520 doesn't have Intel's "
Enhanced Power Loss Data Protection"; it's going to lose its buffers if
it loses power. Similarly, the Vertex 3 doesn't have any kind of power
protection. See:

http://www.intel.com/content/www/us/en/solid-state-drives/ssd-320-series-power-loss-data-protection-...
http://ark.intel.com/products/family/56572/Intel-SSD-500-Family

http://www.ocztechnology.com/res/manuals/OCZ_SSD_Breakdown_Q2-11_1.pdf

The only way I'd use those for a production server was if I had
synchronous replication running to another machine with trustworthy,
durable storage - and if I didn't mind some downtime to restore the
corrupt DB from the replica after power loss.

-- 
 Craig Ringer                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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