On Mon, Jan 6, 2014 at 6:06 PM, Anand Kumar, Karthik <Karthik.AnandKumar@xxxxxxxxxxxxxx> wrote: > Hi, > > We run postgres 9.1.11, on Centos 6.3, and an ext2 filesystem > > Everything will run along okay, and every few hours, for about a couple of > minutes, postgres will slow way down. A "select 1" query takes between 10 > and 15 seconds to run, and the box in general gets lethargic. > > This causes a pile up of connections at the DB, and we run out of > max_connections. > > This is accompanied with a steep spike in system CPU and load avg. No spike > in user CPU or in I/O. As well as the previously mentioned huge pages thing, also look at vm dirty ratio: http://www.westnet.com/~gsmith/content/linux-pdflush.htm -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
