I am using the following spec, for one of my customer as a mail server around 1000 email user, with clamav antivirus, spamassasin spam filter and sendmail, pop3/imap, but the server load is pretty high, load average 4, peak to 10 to 12.
Below is the mail statistic of the mail server, average processing 10,000 a day. The load mainly can from, virus scan, spam filtering, and user login/logout of pop3/imap (around 15,000 login to pop3 per day).
Statistics from Tue Aug 30 17:57:24 2005
M msgsfr bytes_from msgsto bytes_to msgsrej msgsdis Mailer
4 146970 14624267K 64201 6868926K 15927 0 esmtp
9 59444 11008351K 291417 21041350K 3895 0 virthostmail
10 223059 2425506K 61061 280865K 431 0 local
T 429473 28058124K 416679 28191141K 20253 0
C 413174 107852 20253
Any recommendation to reduce the server load, will adding more RAM helps ?
Alan Woo, alan [@] newmediaexpress.com
= NewMedia Express Pte Ltd (AS38001)
= Dedicated Servers in Singapore | Hong Kong | South Korea | Thailand | Malaysia | Indonesia
= Singapore > speedtest.sg | Jakarta > id1.newmediaexpress.com | South Korea > lg.newmediaexpress.co.kr
It would be much easier if you add a barracuda or sonic wall to filter off the spam and virus so that you can disable spamassassin and clamav. Disabling these two should bring about a great increase in the overall performance.