[imp] high cpu load/httpd waiting (imp 2.2.8)

[ddm@ruc.dk]

Hi,
 
  Sorry for the previous mail, just hit "send"
  in place of "save draft"...

  We have the following problem with IMP 2.2.8:
 
  When we restart httpd things are running fine
  for a while then it seems that some httpd
  processes start doing nothing else than wait
  (no system calls) with a cpu load just
  increasing as result. 
  
  Since last week we had IMP 2.2.8 running on
  a single processor server. The server runs:

  - Red Hat 7.1 kernel 2.4.2-2.
  - Horde 1.2.8
  - Apache 1.3.22
  - PHP 4.0.4
  - MySQL 3.23.36

  We reinstalled IMP 2.2.8 on a new server:

  - faster CPU, bigger disks, more RAM
  - Debian 3.0 kernel 2.4.19
  - Horde 1.2.8
  - Apache 1.3.27
  - PHP 4.2.3
  - MySQL 3.23.39
   
  The upgrade didn't fix the problem. Both
  servers were only used to run IMP and we have
  something like 5.000 logins/day.

  We of course checked our network, our IMAP server,
  etc. 

  Did somebody experienced the same problem?
  Does somebody have any idea of what could be the
  problem?

  
Regards,

David 

___________________________________________________
David De Maeyer
Roskilde University Center
Computer Science Department
Box 260, Hus 42.1
4000 Roskilde
Denmark
voice (+45) 46 74 38 29 fax (+45) 46 74 30 72