Hi all,
Iam using postgresql 8.1.4 with 8GB physical RAM.
OS kernel max shared memory usage is set to( /proc/sys/kernel/shmmax) 33554432
dont know if this number is in bytes or bits
now how do i set my shared_buffer setting in postgresql.conf such that ican use max shared memory setting of the
kernel.
also default shared_buffer setting is 1000 - its not clear if i have to multiply this number with 8KB to be <= max
sharedmemory value or it is 1000 bytes or bits.
can i set the max shared memory value to use atleast half of my physicl RAM available ?
any idea ?
also i would like to know how is the performance hit when we change shared_buffer value in general ?
regards,
KM