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From: Leroy van Logchem <leroy.vanlogchem@gmail.com>
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Subject: Still getting kmem exhausted panic
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>> Thanks for the clarification.  I just wish I knew how vm.kmem_size_scale
>> fit into the picture (meaning what it does, etc.).  The sysctl
>> description isn't very helpful.  Again, my lack of VM knowledge...
>>
>Roughly, vm.kmem_size would get set to <available memory> divided by
>vm.kmem_size_scale.

http://lists.freebsd.org/pipermail/freebsd-stable/2010-September/059114.html

Thanks again for the explication, i was amiss after the post above. So
increasing kmem_size_scale will reduce the resulting kmem_size.

/*correct me if i'm wrong - "divided by" triggered this post*/