postgres load

I republish my question for I had no answer, and this is a serious
problem to me... I've used explain, vacuum, indexes... and so on, few
nested requests...



----
I am running PGSql 7.0.3 over Linux 2/ELF with a ReiserFS
filesystem,
Bi-P3 800 and 2Gb of RAM.

        My database jump from 8 in load to 32 without any real reason
nor too
much requests.

        I already do vacuum even on the fly ifever that can decrease
load, but
nothing...

        I've done many indexed also...

        Can someone help me ?

                Emmanuel

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