Dann Corbit wrote:
Message
I have
a machine with 4 CPU's and 2 gigabytes of physical ram.
I would
like to get PostgreSQL to use as much memory as possible. I can't seem
to get PostgreSQL to use more than 100 megabytes or so.
How can
I optimize the use of PostgreSQL to get the maximum throughput in a configuration
like that?
Are there
any memory usage/tuning documents I can read?
I'm not sure if there is a document, but there are some things you can do.
First, size the shared memory pool. I've been told by Tom that too much is
actually slower, but making it MUCH bigger than the default does help a lot.
shared_buffer=2048
(Maybe larger, experiment)
Sort memory, this is useful for large queries that do sorting, it is allocated
as needed on a per process basis. If you run large queries that sort, this
can speed you up instead of sorting to disk.
sort_mem=16384
OK, lastly, do not dispare if PostgreSQL seems not to be using as much memory
as is in your system. Don't forget the OS disk cache is important too.
