Re: Weird memory usage, performance problem with 6.1_STABLE

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Sep 19, 2013 at 03:35:43PM +1200, Mark Davies wrote:
> I have a system that is (sometimes) used as an ftp server to serve g4u 
> disk images.  Current machine is a Dell PowerEdge R320 with 16GB 
> memory running 6.1_STABLE from yesterday.
> 
> If I get 3 ftp clients all reading the same 45GB image from it I 
> quickly get into the situation that all memory is used by something 
> and the machine becomes very unresponsive.  Below is the output of top 
> while in this state:
> 
> [...]
> 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.
What are your vm.* settings (sysctl vm) ?

did you change ftp.conf, especially the mmapsize parameter ?


-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--