Hello,
From kernel tuning page (http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/configtuning-kernel-limits.html)
Some sentence about nmbclusters says:
"Under no circumstances should you specify an arbitrarily high value for
this parameter as it could lead to a boot time crash."
Now I want to push the limits where I need 4KB buffer for each of the 32000
connections I want this server to handle. If I do the math:
(32000 (conns) * 4 (KB/buffer) * 2 (buffer/conn)) / 2048 (KB/cluster)
= 128000 clusters
So I set this arbitrary high value in loader.conf under (kern.ipc.nmbclusters)
and no surprises I get panic: pmap_enter invalid page directory pdir=0x3cb063,
va=0xfff800
(va has a weird address here)
I know I am pushing the limits here but I have plenty of memory (2GB) on this system (after all its just 250MB for network memory ;) and this is mainly just experimentation.
I would like some pointers toward fixing this. Is there another variable tied
into this (I guess so)? Could anybody points me to a technical document that
would explain the relationship with that (those) other(s) presumed variable(s)?
Thank you,
Karim
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