Somebody is probably reformatting your hard drive.

No, seriously you need to provide a LOT more information about your 
configuration for anyone to get the foggiest idea about what causes this.

What HW/OS? Are these disk reads or writes? What kind of modules do you use? 
PHP or no PHP? etc.

I once observed really poor performance on a server during a load test due to 
disk IO and associated wait-times. The IO operations were disk writes which was 
bizarre because nothing was supposed to be written to disk. It turned out being 
mod_ssl writing to the DBM-based SSL session cache. After changing it to shm 
the problem went away...

-ascs
 
-----Message d'origine-----
De : Samuel Vogel [mailto:[EMAIL PROTECTED] 
Envoyé : samedi 29 septembre 2007 17:09
À : users@httpd.apache.org
Objet : [EMAIL PROTECTED] Investigating high harddrive load

Hey people,

I would like to know if there is any way to debug what vhost is causing the 
high load on my harddrive, that I'm experiencing.
To be more specific:
When I run "top", 80% of my CPU time is in i/o wait. How could I find out, what 
vhost is causing this?

Regards,
Samy

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