Hi there, The server runs: - dovecot - apache (roundcube webmail) - sendmail - clamav-milter - amavisd-milter RAM: 4.10 GB CPU: QEMU Virtual CPU version (cpu64-rhel6), 5 cores The server is a VM on a host server that also provides http / mysql services. The host server runs cron jobs to poll the email server (importing data from mail boxes into the CRM) so - to clutch at straws - I am not sure if the host and guest are competing for the disk IO at the same time with these calls. Contrary to that is that the host server does not experience any slow downs. Before the holidays we added another 30 users to the servers. Below is some of the output of some commands. At the moment I am thinking of moving the VM services into a cloud based host but this it not ideal in the short term. Any ideas? Thanks P CPU load averages 8.74 (1 min) 8.05 (5 mins) 5.63 (15 mins) [root]# vmstat 5 10 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 0 5 211056 141268 42948 2472992 1 1 246 47 2 2 2 1 93 5 0 0 3 211056 127876 43208 2486312 0 0 2710 46 1212 895 2 1 66 31 0 0 3 211104 141252 41136 2470440 0 10 3164 45 1109 804 2 1 74 23 0 0 3 211104 128228 41412 2484500 0 0 2859 18 566 640 0 0 60 39 0 0 3 211180 143320 40464 2464324 0 15 3122 70 1254 1030 2 1 57 40 0 Tasks: 502 total, 1 running, 501 sleeping, 0 stopped, 0 zombie Cpu(s): 7.7%us, 2.1%sy, 0.0%ni, 48.3%id, 41.6%wa, 0.0%hi, 0.0%si, 0.2%st Mem: 4296356k total, 4169448k used, 126908k free, 41144k buffers Swap: 2621436k total, 211980k used, 2409456k free, 2484540k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7067 clam 20 0 1771m 361m 1584 S 29.5 8.6 265:23.91 clamd 6450 kylier 20 0 19300 2828 1404 D 1.0 0.1 0:00.03 imap 6544 root 20 0 15396 1552 888 R 1.0 0.0 0:00.29 top 3848 root 20 0 78752 3024 2244 S 0.7 0.1 0:00.23 auth 6398 vickij 20 0 18528 2072 1400 D 0.7 0.0 0:00.48 imap 6419 uuu.s 20 0 18524 2024 1388 D 0.7 0.0 0:00.42 imap 6424 uuuu 20 0 19300 2812 1404 D 0.7 0.1 0:00.23 imap 23252 jasmin.s 20 0 19004 2652 1572 S 0.7 0.1 0:00.42 imap 23345 jasmin.s 20 0 26136 2472 1688 S 0.7 0.1 0:02.72 imap 29215 abigail. 20 0 18840 2068 1536 S 0.7 0.0 0:00.58 imap 1 root 20 0 19356 872 648 S 0.3 0.0 6:07.28 init 1336 root 20 0 244m 5128 508 S 0.3 0.1 19:20.96 rsyslogd 6293 glenn.ge 20 0 18388 1888 1432 S 0.3 0.0 0:00.01 imap 6567 nic.will 20 0 18408 1996 1512 D 0.3 0.0 0:00.08 imap 7091 root 20 0 19268 568 404 S 0.3 0.0 12:40.65 dovecot 7175 root 20 0 98.6m 364 320 S 0.3 0.0 3:43.93 tail 23388 uuuu 20 0 19000 2568 1544 S 0.3 0.1 0:14.31 imap 23460 jasmin.s 20 0 23248 2756 1756 D 0.3 0.1 0:01.54 imap ---8<---------8<---- # like this from here down 2 root 20 0 0 0 0 S 0.0 0.0 0:28.72 kthreadd