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Re: psql large RSS (1.6GB)

From: Markus Bertheau <twanger(at)bluetwanger(dot)de>
To: TTK Ciar <ttk2(at)hardpoint(dot)ciar(dot)org>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: psql large RSS (1.6GB)
Date: 2004-10-31 10:27:01
Message-ID: 1099218421.2636.0.camel@teetnang (view raw or flat)
Thread:
Lists: pgsql-performance
В Срд, 27.10.2004, в 09:57, TTK Ciar пишет:

> brad=# explain analyse select ServerDisks.servername,ServerDisks.diskserial,ServerDisks.diskmountpoint,DiskFiles.name,DiskFiles.md5 from DiskFiles,ServerDisks where DiskFiles.diskserial=ServerDisks.diskserial;
>                           QUERY PLAN                                                         
> ------------------------------------------------------------------
>  Hash Join  (cost=22.50..65.00 rows=1000 width=274) (actual time=118.584..124653.729 rows=10133349 loops=1)
>    Hash Cond: (("outer".diskserial)::text = ("inner".diskserial)::text)
>    ->  Seq Scan on diskfiles  (cost=0.00..20.00 rows=1000 width=198) (actual time=7.201..31336.063 rows=10133349 loops=1)
>    ->  Hash  (cost=20.00..20.00 rows=1000 width=158) (actual time=90.821..90.821 rows=0 loops=1)
>          ->  Seq Scan on serverdisks  (cost=0.00..20.00 rows=1000 width=158) (actual time=9.985..87.364 rows=2280 loops=1)
>  Total runtime: 130944.586 ms

You should run ANALYZE on your database once in a while.

-- 
Markus Bertheau <twanger(at)bluetwanger(dot)de>


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