Re: BUG #3033: performance issue with self join

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On Mon, Feb 19, 2007 at 08:27:32PM +0000, Luigi Tarenga wrote:
>
> The following bug has been logged online:
>
> Bug reference: 3033
> Logged by: Luigi Tarenga
> Email address: luigi(dot)tarenga(at)gmail(dot)com
> PostgreSQL version: 8.1.4
> Operating system: OpenBSD 4.0 amd64
> Description: performance issue with self join
> Details:
[...]
> i'm used to run a query like this one on a 14 row table:
[...]
> and the first time it takes about 30 seconds on my pc.
> the problem raise when i make lots of insert in the
> same table and then delete new rows until i left the
> original 14 [...]
> forever (i waited more then 10 minutes).

You might want to vacuum the table at this point. This might restore
performance.

HTH
- - tomás
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