Debug Flag

Hello ,
 
I'm having quite big performance problems with the mod_proxy. Iam
serving 5 VirtualHosts with 40 ProxyPass sections in each VirtualHost.
After a certain time, mod_proxy just hangs and apache is not alowing any
more connections. It lloks like mod_proxy is filling something which
can't be emptied by the processes.
Is there somewhere a debug flag to set which I can turn on in order to
log everything the mod_proxy is doing into the standard httpd log?

Thank you very much for a quick answer.
 
Kind Regards,
 
    -Ueli

.