Re: Permance issues with migrated db - Mailing list pgsql-general

From Robert Fitzpatrick
Subject Re: Permance issues with migrated db
Date
Msg-id 1179858637.28503.96.camel@columbus.webtent.org
Whole thread Raw
In response to Re: Permance issues with migrated db  (Richard Huxton <dev@archonet.com>)
Responses Re: Permance issues with migrated db
Re: Permance issues with migrated db
List pgsql-general
On Tue, 2007-05-22 at 19:03 +0100, Richard Huxton wrote:
> 4. We're still 5 x slower than MS-SQL (with the count). That might
> well
> be down to having to check visibility on each row with our MVCC
> rather
> than just going to the index.

Tips? I'd love to know how to see inside MVCC. I really appreciate the
help!

>
> Hmm... How much of your machine is PG getting to use vs. MS-SQL? What
> are your shared_buffers, work_mem, effective_cache_size (and how much
> RAM on this box)?

3.5GB of RAM on a Xeon 2.8GHz server. I have default shared_buffers
32MB, no defaults changed except listen_addresses. How can I check
work_mem and effective_cache_size?

--
Robert


pgsql-general by date:

Previous
From: Ron Johnson
Date:
Subject: Re: How to move tables in another physial place
Next
From: Robert Fitzpatrick
Date:
Subject: Re: Permance issues with migrated db