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From: Josh Berkus <josh@agliodbs.com>
To: pgsql-performance@postgresql.org
Subject: Re: How to improve insert speed with index on text column
Date: Tue, 31 Jan 2012 10:46:40 -0800
Message-ID: <4F283710.5040608@agliodbs.com> (raw)
In-Reply-To: <21d33cd6ba3c80ad896633820f6b27ed.squirrel@sq.gransy.com>
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> Shared buffers is the cache maintained by PostgreSQL. All all the data
> that you read/write need to go through shared buffers.

While this is technically true, I need to point out that you generally
increase shared_buffers for high concurrency, and for reads, not for
writes, especially for row-at-a-time inserts.  There's just not that
much memory required (although more than the out-of-the-box defaults).

I'd suggest increasing wal_buffers to 16MB, which is the maximum useful
amount, rather than 5MB.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com



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