Horton

Re: slow dropping of tables, DropRelFileNodeBuffers, tas

Sergey Koposov <koposov@ast.cam.ac.uk>

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From: Sergey Koposov <koposov@ast.cam.ac.uk>
To: Simon Riggs <simon@2ndQuadrant.com>
Cc: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, pgsql-hackers@postgresql.org
Date: 2012-05-31T18:09:17Z
Lists: pgsql-hackers 
On Thu, 31 May 2012, Simon Riggs wrote:

>
> That struck me as a safe and easy optimisation. This was a problem I'd
> been trying to optimise for 9.2, so I've written a patch that appears
> simple and clean enough to be applied directly.

Thanks! The patch indeed improved the timings, 
The dropping of 100 tables in a single commit before the patch took ~ 50 
seconds, now it takes ~ 5 sec (it would be nice to reduce it further 
though, because the dropping of 10000 tables still takes ~10 min).

Cheers,
 	S

*****************************************************
Sergey E. Koposov, PhD, Research Associate
Institute of Astronomy, University of Cambridge
Madingley road, CB3 0HA, Cambridge, UK
Tel: +44-1223-337-551 Web: http://www.ast.cam.ac.uk/~koposov/