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--- monitoring_server_activity [2013/05/29 09:44]
hkoller
+++ monitoring_server_activity [2013/05/29 09:47] (current)
hkoller [iostat]
@@ Line 1: / Line 1: @@
+====== vmstat ======
+<code bash>
+# update every second, size in mb
+vmstat 1 -S m
+</code>
+====== iostat ======
+<code bash>
+# update every 5 seconds, extended, size in mb
+iostat -t 5 -x  -m
+</code>
+====== 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
+<code bash>
+sudo apt-get install sysstat
+sudo vi /etc/default/sysstat   # set ENABLED="true"
+</code>
+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
+<code bash>
+# show cpu usage
+sar
+# show memory usage
+sar -r
+# show disk usage
+sar -dp
+</code>

Small heaps of code