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monitoring_server_activity

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vmstat

# update every second, size in mb
vmstat 1 -S m   

iostat

# update every 5 seconds, extended, size in mb
iostat -t 5 -x  -m

sysstat

Sysstat is a daemon that collects statistics in a regular interval.

installing

Before it can be used it needs to be installed installed with

sudo apt-get install sysstat
sudo vi /etc/default/sysstat   # set ENABLED="true"

the stats collection is triggered every 10 minutes by cron (/etc/cron.d/sysstat)

using

Once stats have been collected, they can be viewed using the sar command

# show cpu usage
sar
 
# show memory usage
sar -r
 
# show disk usage
sar -dp
monitoring_server_activity.txt · Last modified: 2013/05/29 09:47 by hkoller