Re: Weird memory usage, performance problem with 6.1_STABLE

[Lars Heidieker <lars%heidieker.de@localhost>]

On 09/19/2013 01:43 PM, Manuel Bouyer wrote:
> On Thu, Sep 19, 2013 at 08:30:05PM +1000, matthew green wrote:
>> 
>>>> Memory: 15G Act, 113M Inact, 15M Wired, 29M Exec, 15G File,
>>>> 112K Free Swap: 8192M Total, 8192M Free
>>> 
>>> the file cache shouldn't be allowed to use that much memory.
>> 
>> why do you say that?  vm.filemax is not really a maximum, it can
>> use all free memory if there isn't memory pressure.
> 
> OK, I dind't understand it this way.
> 
> I wonder if it could be a case where the kernel runs out of KVA. 
> What is the KVA limit on amd64 ? I couldn't easily find this
> information ...
> 

It uses a direct map, so for practical reasons kva limit > physical
memory size.

Lars

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