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Re: Enumeration of tables is very slow in largish database

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=?ISO-8859-1?Q?Kirill_M=FCller?= <kirill.mueller@xxxxxxxxxxxxxxxx> writes:
> On 01/12/2012 02:02 AM, Tom Lane wrote:
>> There were fixes for that in 8.4.9, so I'd be interested to know if you
>> get a better estimate in a more up-to-date version.

> Something weird happened today. The problem vanished into thin air. Plus 
> we got our server upgrade to 8.4.9, but definitely after the problem 
> disappeared. Unfortunately, I didn't have the time to capture an 
> execution plan before the upgrade. The database has changed during the 
> day, some hundred more tables with geometry columns were added.

> Anyway, I have attached the new execution plan, as produced by server 
> 8.4.9 (squeeze/updates/main postgresql-8.4 amd64 8.4.9-0squeeze1+b1).

This doesn't seem to be for the same query --- I only see one antijoin
in this plan, whereas the plan you posted at
http://archives.postgresql.org/pgsql-general/2012-01/msg00303.php
has two (and therefore doesn't match the query given there, either).

			regards, tom lane

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