Reydan Cankur wrote: > I want to spread out the workload on all cores. But also I want to > set the core number; for example first I want to spread out the > workload to 32 cores then 64 cores and see the scalability. PostgreSQL itself won't use more cores than you have active connections, so one way to deal with this might be to use one of the available connection poolers, like pgpool or pgbouncer. That should allow you to control the number of cores used pretty well, although it won't support targeting particular connections to particular cores (although this technique could be combined with other suggestions). The OS might use another core or two to help with network or disk I/O, but that should be minimal. -Kevin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance