I am having same problem on my system. The Web Interface & My OS getting stuck after few days. I have checked CPU & Memory usage status.
By 'top' command. And see what I found....
1) CPU Usage is 80 to 90%.
2) 'amavisd' & 'java' service is using maximum CPU.
See The Terminal output by executing command 'top'
Code:
#top
top - 18:23:06 up 6:34, 2 users, load average: 13.55, 13.33, 12.82
Tasks: 317 total, 11 running, 306 sleeping, 0 stopped, 0 zombie
Cpu(s): 83.3%us, 15.7%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.2%hi, 0.8%si, 0.0%st
Mem: 2056776k total, 1846488k used, 210288k free, 76068k buffers
Swap: 2966520k total, 332732k used, 2633788k free, 166652k cached
Code:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
21716 zimbra 20 0 416m 10m 3608 S 22 0.5 12:13.79 slapd
18728 zimbra 20 0 212m 63m 3976 R 19 3.1 0:14.47 amavisd
19229 zimbra 20 0 212m 61m 3960 R 19 3.1 0:02.59 amavisd
19187 zimbra 20 0 212m 62m 3956 R 18 3.1 0:04.41 amavisd
19191 zimbra 20 0 212m 62m 3956 R 18 3.1 0:03.44 amavisd
19027 zimbra 20 0 212m 62m 3960 R 18 3.1 0:05.02 amavisd
19228 zimbra 20 0 212m 61m 3964 R 18 3.1 0:03.13 amavisd
19233 zimbra 20 0 212m 61m 3964 S 12 3.1 0:02.76 amavisd
19235 zimbra 20 0 212m 61m 3964 R 9 3.1 0:02.63 amavisd
19190 zimbra 20 0 212m 62m 3972 R 8 3.1 0:03.62 amavisd
23770 postfix 20 0 48332 3004 2060 S 5 0.1 1:38.11 proxymap
5814 postfix 20 0 48404 3132 2112 S 4 0.2 1:45.42 proxymap
18777 zimbra 20 0 212m 62m 3960 R 4 3.1 0:10.88 amavisd
23200 root 20 0 48084 1752 1580 S 4 0.1 2:19.63 master
27475 postfix 20 0 48416 3080 2056 S 2 0.1 2:12.27 proxymap
23210 postfix 20 0 48380 2572 2056 S 1 0.1 1:37.01 proxymap
25622 postfix 20 0 48364 3032 2060 S 1 0.1 1:32.83 proxymap
OS: Ubuntu 10.04 64bit.
ZCS:- 7.0
And one more thing The Web interface getting normal for some time after flush or delete the mail queues.
Please help And Sorry for my bad English.