Re: IO load due to apache? Normal httpd behavior or script related?

[Noel Butler <noel.butler@xxxxxxxxxx>]

On Mon, 2012-05-14 at 17:41 +0200, G VM wrote:
>     Hi all,
>     
>     Recently I found out one server generating alot of load on our storage.
>     

Likely a script problem, httpd wont cause harm



>     Linux 2.6.18-274.7.1.el5 
>     

that is pretty ancient

>     httpd     25431    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     httpd     25454    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     httpd     25622    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     httpd     25792    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     httpd     25794    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     httpd     25846    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     httpd     25849    apache  DEL       REG              253,3                   13 /tmp/apc.Fm8SAS
>     ...
>     
>     The only other is for sshd and another for vmware tools.
>     


ahhhhhhhhhhhhhhh so this is a VM

>     If I try to do ls -lh /tmp/apc.Fm8SAS I get no such file or directory. Using the access time I would see if this file is accessed over and over again. 
>     Am I missing something here? Is this apache doing a fstat() call for example?
>     Or is this file created and deleted over and over again at a very fast pace that I can't access it (this seems less likely to me).
>     
>     Has anyone seen such behaviour in httpd? Or does someone knows a little more of the inner workings of httpd?
>     
>     The name does me think that APC (sort of php module iirc) is having something to do with this:
>     apc.ini:apc.mmap_file_mask=/tmp/apc.XXXXXX
>     
>     The config file seems to confirm this.
>     

If you are not sure what APC is then you cant need it and should disable it

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