From: "Alvaro Herrera" <alvhe...@commandprompt.com>
You don't really know this; some operating systems (Linux in particular) does not show shared memory as in use by a process until it is accessed. It may very well have well over 1.6 GB of shared_buffers, yet not show that in VIRT.
Oh, really? When I started psql just after I set shared_buffers to 2500MB and ran pg_ctl start, "ps -o vsz -p postgres_PID" showed about 2500MB+some. ps's vsz is also the amount of virtual memory. But I want to know the shared_buffers setting.
Anyway, I'd appreciate if anyone could tell me about RelCache/SysCache. As far as I read the code, PostgreSQL seems to use memory for RelCache/SysCache without limit until the relations are dropped.
Regards MauMau -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
