Date: Wed, 12 Mar 2008 14:56:24 -0700 From: Alfred Perlstein <alfred@freebsd.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: Approaching the limit on PV entries Message-ID: <20080312215624.GR67856@elvis.mu.org> In-Reply-To: <fr69hn$q0o$1@ger.gmane.org> References: <fr69hn$q0o$1@ger.gmane.org>
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* Ivan Voras <ivoras@freebsd.org> [080311 08:46] wrote: > During heavy postgresql load (pgbench), /var/log/messages registers > (multiple times) the following message: > > "Approaching the limit on PV entries, consider increasing either the > vm.pmap.shpgperproc or the vm.pmap.pv_entry_max sysctl" > > I'm increasing both, but no matter what I increase them to, after a > short time they again get increased by the system (???). > > The values are currently: > > vm.pmap.shpgperproc: 1134 > vm.pmap.pv_entry_max: 8000000 > > But the last sysctl setting, verified by retrieving it from my shell > command line history, is that I set vm.pmap.shpgperproc to 800. > > Is this normal, and what are the common settings for these values? The > machine is 2x4-core, currently 4 GB RAM (which will increase to at least > 6 GB), amd64, running postgresql, php and apache. > try setting: sysctl kern.ipc.shm_use_phys=1 -- - Alfred Perlstein
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