Hi all, I have now readed many many forums and tried many different solutions and I am not getting good performance to database. My server is Debian linux, with 4gb ram, there is also java application and I am giving to that 512mb (JAVA_OPTS) memory. In database there is now like 4milj rows. What should I do better. Now .conf is: max_connections = 80 shared_buffers = 512MB temp_buffers = 8MB work_mem = 20MB maintenance_work_mem = 384MB wal_buffers = 8MB checkpoint_segments = 128MB effective_cache_size = 2304MB cpu_tuple_cost = 0.0030 cpu_index_tuple_cost = 0.0010 cpu_operator_cost = 0.0005 fsync = off checkpoint_timeout = 1h and I am giving kernels like: sysctl -w kernel.shmmax=1073741824 sysctl -w kernel.shmall=2097152 btw, what file I should modify to give this kernels as defaults ? Thank you very much ! Hope you can clear my problem ! -- View this message in context: http://old.nabble.com/Problem-with-database-performance%2C-Debian-4gb-ram---tp26157096p26157096.html Sent from the PostgreSQL - performance mailing list archive at Nabble.com. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance