On Fri, Jan 21, 2011 at 6:34 PM, DM <dm.aeqa@xxxxxxxxx> wrote: > Firstof all sorry for posting linux kernel question in pgsql-general, but i > am trying to figure out what value to set for postgresql db server. > > RAM = 16GB, what value should i set for shmall? > > If i set shmall to 4294967296 (4GB), shmall is measured in 4096 byte pages. So, you wouldn't set it to ~2^32, but 2^32/2^12 so you'd set it to 2^20 or 1M pages for 4G of space. > current PAGE_SIZE is 4096 should i need > to set my shmmax = 4294967296*4096 = 17592186044416? shmmax is set in bytes, so no translaction needed, just set it to 2^32 (reference: http://publib.boulder.ibm.com/infocenter/db2luw/v9/index.jsp?topic=/com.ibm.db2.udb.uprun.doc/doc/t0008238.htm) -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
