Hi,
I have an server (Pentium III 750 MHz, 500 MB RAM, 50 Gigabyte Disk)
running with vpopmail, qmail, vchkpw and fastforward on SUSE 6.4.
There are 90.000 virtual users on that machine with nearly the same
amount of aliases in the fastforward.cdb.
But there is one problem. I offer pop3 and smtp service on
this machine and have aproximatly 1500 till 2000 connection
at the same time on the machine (netstat -a). 63 percent are pop3
connections and 32 percent smtp. Rest not important.
And I can see only 120 till 130 established connections of those
1500-2000 connections at the same time. The rest (80 %) is in
status SYN_RECV. CPU-load is around 40 percent.
Is there a trick to get more established connection at the same
time on the server, because the other 80 percent were waiting for
the mail to deliver or to receive.
Do I have to manipulate the network stack or something ?
Please mail me any idea.....
