Hi, thanks a lot! you are rigth, but I did read your message ;) Yes, 1- I misconfigured PostgreSQL (I thought that was already configured in base to the released version - Fedora Core 3 64bit). 2- The bench is, clearly after your precisations, an MySQL tuned application tests. 3- I think the bench test only one connection, I didn't see (in a fast reading) no threading request in the bench code to simulate users requests. 4- I didn't test transaction-safe (that isn't used explicitly in my application) I understand it isn't simple.. I use the dbms in data analysis environment and the more time is spent in query (php is 0.1%) with more sub-selects and maybe there's, in the same time, from 1 to 1000 users insert/update data. I tests the dbms with my data analysis framework simulating an super-extensive request. Do you know where I can find an tutorial to configure hardware dependent Postgres internal values? Thx, best regards,Mauro
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