<cut> Hi all. Well I have used all Your recomendations but I still have no luck with performance tunning. The machine has a moments thas was utilized in 100%. The problem was I/O on disks. CPU's were busy on system interrupts. I have started again to look of I/O performance tunning and I have changed a synchronous_commit = off Ofcourse with risk that if there will be a power failure I will lose some data. But this is acceptable. This caused a monumental performance jump. From a machine that is utilized on 100%, machine is now sleeping and doing nothing. I have executed some sqls on huge tables like history and all has executed like lightning. Comparing to MySQL, PostgreSQL in this configuration is about 30 - 40% faster in serving data. Housekeeper is about 2 to 3 times faster!!!! Many thanks to all helpers and all PostgreSQL team. -- Greeting Krzysztof Kardas -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
