Date: Wed, 7 Mar 2007 11:43:38 -0500 From: Bill Moran <wmoran@collaborativefusion.com> To: "Eduardo Meyer" <dudu.meyer@gmail.com> Cc: hackers@freebsd.org, current@freebsd.org Subject: Re: How PMAP_SHPGPERPROC relate to vm.v_free_min, vm.v_free_reserved and vm.v_free_target? Message-ID: <20070307114338.344304f9.wmoran@collaborativefusion.com> In-Reply-To: <d3ea75b30703070754p5a8296f3lbaf8dab8b3a24a20@mail.gmail.com> References: <d3ea75b30703070754p5a8296f3lbaf8dab8b3a24a20@mail.gmail.com>
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In response to "Eduardo Meyer" <dudu.meyer@gmail.com>: > Heavy Apache usage is demanding a higher PMAP_SHPGPERPROC kernel > option in my system. However I keep getting the NOTES-documented panic > at boot time, meaning I need to adequately do vm.v_free_min, > vm.v_free_reserved and vm.v_free_target sysctl tuning. > > However, this sysctl vars dont have a description and I simply can't > find any further documentation regarding how the vars relate among > themselves and how they related to PMAP_SHPGPERPROC. Can anyone please > explain some basics about how they relate and how I can do the tuning? > > It is a 5.5-STABLE with 9GB of memory and PAE enable (sure). > > Hackers' feedback or sysadmins' personal experiences are heavily appreciated. How high did you raise PMAP_SHPGPERPROC? We raised it to 250 on our stock PostgreSQL systems and did not have to tweak any other values. Note that we're running 6.x on these systems, so YMMV. > Sorry for cross-posting, I was not sure which list was more adequate. Probably -hackers@. Although I would have started with -questions@ -- Bill Moran Collaborative Fusion Inc.
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