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Re: 8.4 open item: copy performance regression? - Mailing list pgsql-hackers

From Simon Riggs
Subject Re: 8.4 open item: copy performance regression?
Date
Msg-id 1245488094.3895.506.camel@ebony.2ndQuadrant
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In response to Re: 8.4 open item: copy performance regression?  (Greg Smith <gsmith@gregsmith.com>)
Responses Re: 8.4 open item: copy performance regression?  (Greg Smith <gsmith@gregsmith.com>)
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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.comPostgreSQL Training, Services and Support

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