Mike Tancsa wrote:
At 08:11 AM 12/26/2007, Scott Long wrote:
How does one know if the vfs.ufs.dirhash_maxmem is set too
high and are exhausting KVA ?
Panics, freezes, failure to exec new programs, failure to create
pipes, etc.
Is there anyway to know ahead of time one is getting close to the stage
where all those "bad things" start to happen ?
At least on FreeBSD 4.11 you can do
sysctl -a|grep kvm
and get something like this:
vm.kvm_size: 1065353216
vm.kvm_free: 348127232
Perhaps this works on later versions of FreeBSD, too.
Now, if vm.kvm_free drops to 10% or so of vm.kvm_size and continues to
fall, and vfs.ufs.dirhash_mem still hasn't hit the
vfs.ufs.dirhash_maxmem limit, it's time to get concerned. Of course,
you can also use the vm.kvm_* values to dimension vfs.ufs.dirhash_maxmem
properly in the first place.
Regards,
Uwe
--
Uwe Doering | EscapeBox - Managed On-Demand UNIX Servers
[EMAIL PROTECTED] | http://www.escapebox.net
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