| From: | Greg Smith <gsmith(at)gregsmith(dot)com> |
|---|---|
| To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Alan Li <ali(at)truviso(dot)com> |
| Subject: | Re: 8.4 open item: copy performance regression? |
| Date: | 2009-06-22 20:33:23 |
| Message-ID: | alpine.GSO.2.01.0906221626500.2428@westnet.com |
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| Thread: | |
| Lists: | pgsql-hackers |
On Mon, 22 Jun 2009, Kevin Grittner wrote:
> When I tried with setting the ring size to 16MB, I accidentally left off
> the step to copy the postgresql.conf file, and got better performance.
Do you have happen to have a build with assertions turned on? That is one
common cause of performance going down via increased shared_buffers that
people tend to run into during beta.
You can check via psql with
show debug_assertions;
--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD
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