Deleting large amount of data.

Greetings,

I'm having some perfomance problems related with large amount of tuples in a table, so I decided to start programming some shell scripts to be placed in crontad to remove old data every night.

Now, my questions are :

If I just execute a DELETE * FROM WHERE call_start < '2002-08-21' and call_start > '2002-08-20', and that interval has 100.000 tuples, does DELETE start and commit a transaction for every single deletion?

And If I put a BEGIN at the beginning and a COMMIT at the end, do deleted tuples overload transaction logs?

Finally, what's the best thing to do?

Best regards.

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José Vilson de Mello de Farias
Software Engineer

Dígitro Tecnologia Ltda - www.digitro.com.br - Brazil
APC - Customer Oriented Applications
E-mail: vilson(dot)farias(at)digitro(dot)com(dot)br
Tel.: +55 48 281 7158
ICQ 11866179
--------------------------------------------------------------------------------
José Vilson de Mello de Farias
Analista de Sistemas

Dígitro Tecnologia Ltda - www.digitro.com.br
APC - Aplicativos Orientados ao Cliente
E-mail: vilson(dot)farias(at)digitro(dot)com(dot)br
Tel.: +55 48 281 7158
ICQ 11866179