Re: fatal ERROR running simple join query...

Quoting Ligia Pimentel <lmpimentel@yahoo.com>:

> 
> I have a problem with postgres, I'm running a query that joins two tables,
> one with 129000+ records, and the other with 1172 records, it's a very
> simple join.  But postgres can't handle it!!! (Both tables have an index on
> the  field "cuentacb").
> 
> I get the following error after 3 minutes...
> 
> migracion=# select * from cuentasequivalentes, equiv11mayo m
> migracion-# where cuentasequivalentes.cuentacb = m.cuentacb
> migracion-# and cuentasequivalentes.cuentabr <> m.cuentabr;
> FATAL 1:  Memory exhausted in AllocSetAlloc()
> pqReadData() -- backend closed the channel unexpectedly.
>         This probably means the backend terminated abnormally
>         before or while processing the request.
> The connection to the server was lost. Attempting reset: Succeeded.

First you should run VACUUM analyze on that database, or at least on those 2
tables. Check with EXPLAIN to see how much better the queries get after the
analyze.

> What can I do? I'm guessing that I could change a configuration parameter
> or
> something like that, but I don't know.

There are so many parameters to change, that I have to tell you to go and see
the "PostgreSQL 7.1 Administrator's Guide".

Saludos... :-)

-- 
El mejor sistema operativo es aquel que te da de comer.
Cuida tu dieta.
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Martin Marques                  |        mmarques@unl.edu.ar
Programador, Administrador      |       Centro de Telematica                      Universidad Nacional
        del Litoral
 
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