Fopen extremely slow, server crash on maxclients, plz help

[bob231]

On separate upgraded systems ive this problem.

Some crons use fopen to trigger some actions.
This working fine in psa 7,8 and 9.

Since ive upgrade from 9.3 to 10.1 fopen works extremely slow.
The cron / wget process still leave, so the maxclients was reached and apache crached serveral times now.

Does some one have a idea how to solve this, this problem is verry annoying for me.
Log files doest show any errors, just:
[Fri Dec 24 13:27:40 2010] [error] server reached MaxClients setting, consider raising the MaxClients setting

I use php-5.2.16-1.el5.art.
This is not the problem, on another server running same versions with plesk 9 no problem with fopen.

Also checked the resolv.conf. The nameservers are correct set. Same settings as the plesk 9 server.
Trace or ping works good.

 

[bob231]

It take around 45 - 60 secons to get a small image (2kb).
For information i use virtuozzo. Ive never had this problem before with plesk 8, 9.
Please help, everythings drops down every hour
I cant disable the fopen crons, they important for me.

Thanks a lot.