[[linux_og_unix:sysadm|Tilbage til Sysadm]]

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===== Sysstat =====

  * **mpstat** (Global Average Activities by All CPUs.) 
    * **-P ALL** : (Indicate Processor Number)
    * **-I** : print total number of interrupt statistics about per processor.)
    * **-A** = **-u -I ALL -p ALL**) : display all information)

  * **pidstat** (Process and Kernel Threads Statistics)
    * **-p** : non-active tasks
    * **-t** : display statistics of selected process
    * **-rh** : memory utilization of processes which are frequently varying their utilization
    * **-R** : realtime priority and scheduling information

  * **sar** (System Activity Reporter)
    * **-F** statistics about the mounted file systems
    * **-q** run queue length, total number of processes and load average
    * **-n DEV** network statistics 
    * **-d** block device statistics
    * **-r** memory statistics

  * **safd -d** (Extract sar data) f.eks. /var/log/sa/sa20140903 -- -n DEV | grep -v lo