Hi, list. I've just upgraded pgsql from 8.3 to 8.4. I've used pgtune before and everything worked fine for me. And now i have ~93% cpu load. Here's changed values of config: default_statistics_target = 50 maintenance_work_mem = 1GB constraint_exclusion = on checkpoint_completion_target = 0.9 effective_cache_size = 22GB work_mem = 192MB wal_buffers = 8MB checkpoint_segments = 16 shared_buffers = 7680MB max_connections = 80 My box is Nehalem 2xQuad 2.8 with RAM 32Gb, and there's only postgresql working on it. For connection pooling i'm using pgbouncer's latest version with pool_size 20 (used 30 before, but now lowered) and 10k connections. What parameters i should give more attention on? -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance