Hi guys and gals I'm wondering if someone can help me. Please move If inThe wrong place. After following the perfect server guide for apache and debian 6 squeeze with dovecot imap postfix squirrelmail. I installed it on my 3Gb ram vps. It's showing that its using 42% ram constantly!! Is this normal for ram usage? It's my first time in setting up a full control panel with emails. Anybody got some tips to reduce it? I've currently got 5 domains hosted on it with less than 20 hits per month each (family and friends local business sites). I will add a list of running services when I get back home
Can you post the output of free -m? I am willing to bet that a lot of your ram is cached. If so, you can read this. http://www.linuxatemyram.com/
free ram results heres the outcome of it Code: free -m total used free shared buffers cached Mem: 3072 1617 1454 0 0 0 -/+ buffers/cache: 1617 1454 Swap: 0 0 0 if it is cache do you know of any other hints and tips or can point me in the direction to tune my server? Thanks for your help Matt PSTREE output Code: # pstree init-+-Xtightvnc |-amavisd-new---2*[amavisd-new] |-apache2-+-apache2---3*[php-cgi---php-cgi] | |-5*[apache2] | `-vlogger |-clamd---{clamd} |-cron |-dovecot-+-2*[dovecot-auth] | |-3*[imap] | `-6*[imap-login] |-fail2ban-server---6*[{fail2ban-serve}] |-freshclam |-master-+-pickup | |-qmgr | `-tlsmgr |-mysqld_safe-+-logger | `-mysqld---17*[{mysqld}] |-named---4*[{named}] |-pure-ftpd-mysql |-saslauthd---saslauthd |-sshd---sshd---bash---pstree |-syslogd |-xinetd `-xstartup---Xsession---xmessage This is what i get from top (first page) Code: top - 00:14:30 up 1 day, 14:24, 1 user, load average: 0.33, 0.58, 0.28 Tasks: 57 total, 1 running, 56 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 3145728k total, 1661620k used, 1484108k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1 root 15 0 8364 824 692 S 0 0.0 0:00.41 init 1043 web3 20 0 324m 11m 7820 S 0 0.4 0:00.03 php-cgi 1178 postfix 15 0 52840 3652 2732 S 0 0.1 0:00.00 cleanup 1181 postfix 15 0 52612 3352 2548 S 0 0.1 0:00.00 proxymap 1182 postfix 15 0 52764 3928 2940 S 0 0.1 0:00.00 trivial-rewrite 1183 postfix 15 0 56864 3232 2460 S 0 0.1 0:00.00 smtp 1232 postfix 15 0 57136 4404 3336 S 0 0.1 0:00.00 smtpd 1233 postfix 17 0 52420 2952 2288 S 0 0.1 0:00.00 pipe 1235 postfix 16 0 39276 2440 1924 S 0 0.1 0:00.00 bounce 1245 root 15 0 19048 1304 1024 R 0 0.0 0:00.07 top 1537 root 18 0 54572 616 464 S 0 0.0 0:00.00 saslauthd 1538 root 18 0 54572 308 156 S 0 0.0 0:00.00 saslauthd 1545 root 15 0 5988 692 552 S 0 0.0 0:00.67 syslogd 1556 amavis 15 0 207m 58m 3404 S 0 1.9 0:02.17 amavisd-new 1564 bind 18 0 135m 13m 2024 S 0 0.4 0:00.12 named 1580 root 18 0 420m 17m 8464 S 0 0.6 0:00.21 apache2 1586 root 18 0 20372 3984 1932 S 0 0.1 0:00.20 vlogger 1590 www-data 15 0 163m 3780 628 S 0 0.1 0:00.19 apache2 1828 amavis 15 0 210m 64m 4048 S 0 2.1 0:01.53 amavisd-new 1829 amavis 16 0 210m 65m 4020 S 0 2.1 0:01.64 amavisd-new 1831 clamav 18 0 271m 205m 5480 S 0 6.7 1:08.63 clamd 1928 clamav 25 0 42740 1572 1188 S 0 0.0 2:20.04 freshclam 1948 root 15 0 20916 968 752 S 0 0.0 0:00.17 cron 1958 root 15 0 94024 6984 2208 S 0 0.2 0:03.34 fail2ban-server 2003 root 25 0 9148 1396 1136 S 0 0.0 0:00.01 mysqld_safe 3154 mysql 15 0 238m 23m 6308 S 0 0.8 0:12.10 mysqld 3156 root 23 0 3860 628 536 S 0 0.0 0:00.00 logger 3294 postfix 15 0 39244 2384 1880 S 0 0.1 0:00.00 pickup 3335 root 15 0 37180 2432 1908 S 0 0.1 0:00.70 master 3344 postfix 15 0 52536 3040 2344 S 0 0.1 0:00.02 qmgr 3357 root 15 0 34060 1656 1248 S 0 0.1 0:00.11 pure-ftpd-mysql 3369 root 18 0 39056 920 568 S 0 0.0 0:00.00 dovecot 3370 root 15 0 74904 3400 2604 S 0 0.1 0:00.00 dovecot-auth
Code: free -m total used free shared buffers cached Mem: 992 844 148 0 92 361 -/+ buffers/cache: 390 602 Swap: 2015 0 2015 is my output from a pretty much fresh install on CentOS 6.4 with dovecot, squirrel mail, nginx etc. (perfect server tut) Perhaps you could detail what sort of install you did (e.g. any predefined template or extra packages, or just a minimal OS install?) If RAM is an issue, consider switching over to nginx, that'll help a bit. Also, combination of clamav and amavis tends to take up a few 100mb of RAM - perhaps consider an alternative to them maybe.
It was just a very minimal vps debian install it basically had apache and ssh that was all. Then followed this: http://www.howtoforge.com/perfect-server-debian-squeeze-with-bind-and-dovecot-ispconfig-3-p6 I did a bit of tinkering and looking round. Removed dovecot-pop3d package as I make my clients connet over imaps and my ram usage has dropped by early half. Code: ~# free -m total used free shared buffers cached Mem: 3072 901 2170 0 0 0 -/+ buffers/cache: 901 2170 Swap: 0 0 0 Is it easy just to switch? All my clients have setup Wordpress and one is using woo commerce for her store. I noticed it hogged ram. Is there a way to limit it? If it would be better to start from scratch which dirs should I backup to keep my current config for dovecot postfix ect because I've got them running great now Thanks for your help its truly appreciated.
Your current setup is absolutely fine and the mmeory usage is normal. Services cache data to speed up your server, please see link in post #2. As long as you dont see swap usage or in a openvz / virtuozzo vps that the memory beancounters are reached, evrything is fine. Your server has plenty of ram, so no need for any changes or a reinstall.
To add more to what Till mentioned, it looks like you are on an OpenVZ node without VSwap. This means that you have no ability to cache, and the memory management in that kernel is/was pretty poor for the containers. It over inflates your memory usage, but it should not be too big of an issue for you. Another place that you can go save memory is to turn off inno-db in mysql. If you are not going to use it, there is no need for you to have the memory used.
Thanks! thanks you all! Least i know its not something wrong with my install and i can focus on optimising my services! All best, Matt
