On Tue, Jan 8, 2013 at 11:28 AM, Shaun Thomas <sthomas@xxxxxxxxxxxxxxxx> wrote: > On 01/08/2013 12:25 PM, Midge Brown wrote: > >> The kernel on our Linux system doesn't appear to have these two >> settings according to the list provided by sysctl -a. Please pardon >> my ignorance, but should I add them? > > > Sorry if I wasn't more clear. These only apply to Linux systems with the > Completely Fair Scheduler, as opposed to the O(1) scheduler. For all intents > and purposes, this means 3.0 kernels and above. > > With a 2.6 kernel, you're fine. > > Effectively these changes fix what is basically a performance regression > compared to older kernels. What's the comparison of these settings versus say going to the NOP scheduler? -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
