At the beginning of this year I took a VPS for my website because I was running against the resource limits from a shared hosting.

Here are the things I know:

• 2GB memory, with 1GB swap
• Debian X64 server ED installed

Software running on the webserver:

• mysql
• apache
• postfix
• pop3
• imap
• amavisd
• clamd
• cron
• fail2ban
• munin-node
• pure-ftpd
• spamd
• nginx

Now for the setup: Nginx listens on port 80 and handles the static files, the php side is done by apache2 running mod_php in combi with apc(no var caching!).

Iam using a pretty 'busy' drupal and phpbb stack on the server, for drupal iam using boost and authcache to handle of the server load with a pressflow stack. phpbb is just phpbb3 with some mods installed, but has at max 30 users online at a time..

The problem is that its staring to use the swap after a few days after a reboot and thus the site becomes slower.

I'v added pictures of monit and munin, so maybe somebody can help me out...

Monit:

Munin: