:: Disk usage in percent

:: Inode usage in percent

:: Connections through firewall

:: eth0 errors

:: eth0 traffic

:: Firewall Throughput

:: ipconntrack

:: venet0 errors

:: venet0 traffic

:: Postfix bytes throughput

:: Postfix Mailqueue

:: PostgreSQL replication lag

:: Fork rate

:: Number of threads

:: Processes

:: Processes priority

:: VMstat

:: Available entropy

:: CPU usage

:: File table usage

:: Inode table usage

:: Interrupts and context switches

:: Load average

:: Logged in users

:: Memory usage

:: Swap in/out

:: Uptime