Date: Tue, 20 Mar 2001 10:52:56 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: Alfred Perlstein <bright@wintelcom.net> Cc: "Michael C . Wu" <keichii@peorth.iteration.net>, "Michael C . Wu" <keichii@iteration.net>, izero@ms26.hinet.net, cross@math.psu.edu, grog@FreeBSD.ORG, fs@FreeBSD.ORG, hackers@FreeBSD.ORG Subject: Re: tuning a VERY heavily (30.0) loaded scerver Message-ID: <200103201852.f2KIquW95665@earth.backplane.com> References: <20010320111144.A51924@peorth.iteration.net> <20010320092717.R29888@fw.wintelcom.net> <20010320113818.B52586@peorth.iteration.net> <20010320120112.C52586@peorth.iteration.net> <200103201815.f2KIFR594803@earth.backplane.com> <20010320122350.F52586@peorth.iteration.net> <20010320103130.Y29888@fw.wintelcom.net>
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:If this is a result of the shared memory, then my sysctl should fix it.
:
:Be aware, that it doesn't fix it on the fly! You must drop and recreate
:the shared memory segments.
:
:better to reboot actually and set the variable before any shm is
:allocated.
:
:--
:-Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org]
Lets see. Approximately 4MB shared across 4000 processes. That eats
1024 pte's per process, or around 4 million pmap elements that would be
saved. That's a lot of KVM that would be saved. I'll bet turning
that option on will magically solve most of Michael's problems too
(though I'd still get rid of the MFS filesystem).
-Matt
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