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Date:      Fri, 16 Feb 2001 09:39:48 +0100
From:      Michael O Shea <micheal@com4u.ch>
To:        "'freebsd-isp@freebsd.org'" <freebsd-isp@freebsd.org>
Subject:   Re: Mail Server with LDAP?
Message-ID:  <p05001901b6b294e0dcff@[62.2.147.87]>
In-Reply-To: <20010215164305.C28567@elwood.net>
References:  <C1781C38F13DA040848FEFAD07311B10459979@walleye.corp.fishnet.com> <20010215164305.C28567@elwood.net>

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Hi folks.
I am starting to see these kernel messages on a busy postgres/FreeBSD box.

=46eb 15 23:29:20 pgsql2 /kernel: pmap_collect: collecting pv entries 
-- suggest increasing PMAP_SHPGPERPROC

Lint says about this,
#
# Set the number of PV entries per process.  Increasing this can
# stop panics related to heavy use of shared memory. However, that can
# (combined with large amounts of physical memory) cause panics at
# boot time due the kernel running out of VM space.
#
# If you're tweaking this, you might also want to increase the sysctls
# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
#
# The value below is the one more than the default.
#
options         PMAP_SHPGPERPROC=3D201


What would be a good value for this on a busy postgres box ,dual 
xeon/2G RAM /100-180 postgres daemons ?
-- 

Micheal O Shea

-----------------------------------------------------
com-o-tronic ag
Micheal O Shea, Systems Engineer
Gewerbepark
CH-5506 M=E4genwil

E-Mail   micheal@com4u.ch

Voice:      +41 62 887 3734
=46ax:        +41 62 896 1133

Internet: http://www.com4u.ch http://www.ehitline.ch


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