Horton

Re: Configuring PostgreSQL to minimize impact of checkpoints

scott.marlowe <scott.marlowe@ihs.com>

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From: "scott.marlowe" <scott.marlowe@ihs.com>
To: Paul Tuckfield <paul@tuckfield.com>
Cc: <jao@geophile.com>, Matthew Nuzum <cobalt@bearfruit.org>, <pgsql-performance@postgresql.org>, Rob Fielding <rob@dsvr.net>
Date: 2004-05-11T22:07:36Z
Lists: pgsql-performance 
On Tue, 11 May 2004, Paul Tuckfield wrote:

> Love that froogle.
> 
> It looks like a nice card.     One thing I didn't get straight is if 
> the cache is writethru or write back.
> 
> If the original posters problem is truly a burst write problem (and not 
> linux caching or virtual memory overcommitment) then writeback is key.

the MegaRaid can be configured either way.  it defaults to writeback if 
the battery backed cache is present, I believe.