| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Greg Smith <gsmith(at)gregsmith(dot)com> |
| Cc: | Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, 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: | 2009-06-20 08:54:54 |
| Message-ID: | 1245488094.3895.506.camel@ebony.2ndQuadrant |
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| Lists: | pgsql-hackers |
On Fri, 2009-06-19 at 22:03 -0400, Greg Smith wrote:
> This makes me wonder if in addition to the ring buffering issue, there
> isn't just plain more writing per average completed transaction in 8.4
> with this type of COPY.
I would suggest that we check how much WAL has been written. There may
be a secondary effect or a different regression hidden in these results.
--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Training, Services and Support
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