[rt-users] Apache2 CPU hungry !

[Michele Pinassi]

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Hi Kevin,

this is the problem ! There's a lot of memory and CPU usage but, on that
machine, there's ONLY RT 4.0.2 !!!!!

It's a normal behaviour ?

Michele

On 26/10/2011 21:38, Kevin Falcone wrote:
> On Wed, Oct 26, 2011 at 09:21:51AM +0200, Michele Pinassi wrote:
>> Hi all,
>>
>> my RT 4.0.2 installation is too CPU hungry, expecially for apache2
>> threads. Here's the HTOP display of processes and threads:
>> http://imageshack.us/photo/my-images/810/schermatagf.png/
> 
> That doesn't show high CPU usage, but it does show you being
> dangerously close to swap.  When an Apache server starts heavily using
> swap, you get into swap death where a lot of CPU is wasted copying
> apache children in and out of swap space.
> 
> You either need to prune back your apache children to fit comfortably
> in 1G of ram (and tune the max to never go above your memory
> availability) or give the machine more RAM.  Keep in mind that a
> default apache may spawn 8 children, but be able to spawn another 20+
> children when required and that can push you off a memory cliff.
> 
> -kevin
> 
> 
> 
> --------
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