| From: | Sergey Koposov <koposov(at)ast(dot)cam(dot)ac(dot)uk> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: slow dropping of tables, DropRelFileNodeBuffers, tas |
| Date: | 2012-05-31 18:09:17 |
| Message-ID: | alpine.LRH.2.02.1205311849370.6351@calx046.ast.cam.ac.uk |
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| 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/
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