I use ISPConfig on Debian 3.1 (with perfect setup) and i wonder what the max users number that is possible to create on the server ? today I have already 600 accounts users (mail + http) on the system... Which is the limit not to be exceeded ? my CPU goes up up to 60 % (spamassassin is greedy in CPU !!! : average is 17 %). Sorry for my english thanks for your great work
I think the only limit is the hardware. One problem might be that ISPConfig uses spamc and not spamd which uses more cpu power, but this will be addressed in later versions.
Ok, how can i regulate flow of mails ? I think if i regulate this flow, my cpu will be use less. Could we manage the postfix queue to space the treatment of emails ? Thanks for your help !
yes why not ? do you think that is a good idea ? I think that because when my cpu goes up 60, 80 %, access time to the webmail (or all http access) are very slow ! What do you think about that ?
I know that you can set an cpu usage limit in exim MTA. Maybe there is something similar for postfix. This might be a better solution then limiting the number of mails.
Today when i do a top comand i have 650 tasks total !!!! The major part of proccess are spamassassin and clamscan. The problem is during this time http access is very slow !!! My clients can't access to their sites. How can i regular the number of task ? My CPU is Sempron 2400+. Do you think the problem is the cpu ? I have an ISPConfig 2.1.1 on debian sarge Thanks for your help !
The problem will be the CPU and amount of RAM in conjunction with too many web sites/users/email addresses for that hardware. Maybe you can swith off spam filtering for users that use spam filters in their email clients, or outsource the spam filtering to another server?
Thanks Falko, if i change the CPU with a 3200+ barton, do you think it will be better ? i have 1GB of ram yet... I don't know how i could outsource spam filtering on another server It seems to be not trivial...
i do a "top" Mem : 905400k Total Mem : 875884k Used but the total of tasks is less significant (130 tasks)
I think Linux is using all of the ram. On my other ISPConfig server i have not any problem but ram is 95% used. More the ram is more it uses it. My CPU goes up 60 % or 90 % When i have 600 tasks running ! Actually i have only 150 tasks but my CPU goes between 10 and 95 %...
Code: top - 10:58:12 up 15 days, 15:24, 1 user, load average: 1.18, 1.04, 0.95 Tasks: 121 total, 8 running, 112 sleeping, 0 stopped, 1 zombie Cpu(s): 5.3% user, 7.6% system, 0.0% nice, 87.1% idle Mem: 905400k total, 897292k used, 8108k free, 19540k buffers Swap: 2714944k total, 78220k used, 2636724k free, 720340k cached So what do you think ?
I waited for my cpu goes up 50 % top - 14:48:25 up 15 days, 19:14, 1 user, load average: 6.25, 5.85, 5.09 Tasks: 134 total, 1 running, 133 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7% user, 2.0% system, 0.0% nice, 97.4% idle Mem: 905400k total, 875852k used, 29548k free, 21528k buffers Swap: 2714944k total, 78356k used, 2636588k free, 686268k cached top - 14:49:14 up 15 days, 19:15, 1 user, load average: 3.03, 5.02, 4.84 Tasks: 139 total, 4 running, 135 sleeping, 0 stopped, 0 zombie Cpu(s): 87.4% user, 11.3% system, 0.0% nice, 1.3% idle Mem: 905400k total, 898940k used, 6460k free, 22088k buffers Swap: 2714944k total, 78336k used, 2636608k free, 655364k cached
You should consider replacing the CPU by a faster one. Maybe consider one of the new dual core CPU's, if your mainboard is compatible with them.
