[LON-CAPA-admin] Runaway memory?

[Guy Albertelli II]

Hi Mark,

> I haven't really had a chance to identify if it's just one process or
> the collection.
> 
> I'm looking at capa8 right now and I have three children above 180Mb
> (183-221). The rest are around 29-48.
> 
> Could an upload of a large file (say a technical report at 20Mb)
> permanently bloat an httpd child?

Possibly, Perl does some internal mangment of temp values that can
cause this to occur.

> I know I could tune the number of hits before a child is reloaded. Is
> there a way to trim a child out when it gets too big (say over 100Mb)?

You could try out
Apache::SizeLimit

To do this. I haven't tried it out my self yet but it seems like a
reasonable tool.

Apache::Resource also might be a useful tool.

> 
> Later,
> Mark
> 
> 
> On Wed, 2007-10-24 at 14:34 -0400, Guy Albertelli II wrote:
> > Hi Mark,
> > 
> > > Has anyone had any runaway memory events on their access servers?
> > 
> > Is it individual httpds becoming huge? Or just a large number of
> > httpds?
> > 
> > Or is it some other process becoming huge?
> > 
> > > 
> > > The out of memory killer killed my processes running on one of our
> > > access servers during a moderately high load time. I'm running a
> > > reasonably up to date CENTOS 5 version (the latest kernel update has not
> > > yet been installed).
> > > 
> > > This may be concurrent with students trying to upload large files for a
> > > lab report.
> > > 
> > > The memory started spiking about an hour before the crash. I began
> > > getting lowmem_reserve errors on the console.
> > > 
> > > Any advice is welcome!
> > > 
> > > Mark
> > > 
> > > -- 
> > > ----------------------------------------------------------------------------
> > > Mark Lucas                                      email: lucasm at ohiou.edu
> > > 252D Clippinger Lab                             phone: (740)597-2984
> > > Department of Physics and Astronomy             fax:   (740)593-0433
> > > Ohio University
> > > Athens, OH 45701
> > > 
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> > > LON-CAPA-admin at mail.lon-capa.org
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> > 
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-- 
guy at albertelli.com   0-7-0-6-27,137