kmem_malloc(4096): kmem_map too small: 536870912 total allocated

[Vladimir Sharun]

Kris Kennaway wrote:
> >>> We have 2xOpteron/2Gb RAM server with extrensive disk load. Every week or two
> >>> it suddenly hangs with "kmem_malloc(4096): kmem_map too small 335bla-bla allocated". 
> >>> I look onto handbook and put vm.kmem_size_max="536870912" onto /boot/loader.conf.
> >>> Today was the same with the new parameters. Is there any other solutions ?
>> 
>  KK>> If that's not enough, try making it larger.
>> 
>> On what size we can be sure, that "that's enough" ?

 KK> It depends on your workload, so keep increasing it until the problem
 KK> stops or you discover that you need more RAM to handle your workload.

Looks like kernel leak (thanks for tip to Gleb Smirnov) in lockf.
# vmstat -zm | grep lock
        lockf 2257779 70556K       - 19476940  32,64
... and keep raising.

That's another one machine with 1Gb RAM, having 512M for vm.kmem_size_max too.

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