Tipp: iostat, mpstat, pidstat Befehle unter Linux installieren

iostat gibt ausführliche Informationen über den CPU-Status und die Input/Output Statistiken der angeschlossen Festplatten zurück. Wichtig für die Analyse von Read/Write Vorgängen des Linux Servers.

sudo apt install sysstat

Folgende Möglichkeiten habt ihr damit:

1. iostat

root@srv:~# iostat
Linux 4.4.0-72-generic (srv.local)   04/07/2017      _x86_64_        (1 CPU)
avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           3.63    1.32    2.28    5.90    0.46   86.41
Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
vda              21.30       750.75       994.51     338905     448940

2. mpstat

root@srv:~# mpstat
Linux 4.4.0-72-generic (srv.local)   04/07/2017      _x86_64_        (1 CPU)
12:54:10 PM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest  %gnice   %idle
12:54:10 PM  all    3.17    1.16    1.81    5.16    0.00    0.21    0.45    0.00    0.00   88.04

3. pidstat

root@srv:~# pidstat
Linux 4.4.0-72-generic (srv.local)   04/07/2017      _x86_64_        (1 CPU)
12:54:50 PM   UID       PID    %usr %system  %guest    %CPU   CPU  Command
12:54:50 PM     0         1    0.11    0.97    0.00    1.08     0  systemd
12:54:50 PM     0         2    0.00    0.01    0.00    0.01     0  kthreadd
12:54:50 PM     0         3    0.00    0.01    0.00    0.01     0  ksoftirqd/0
12:54:50 PM     0         4    0.00    0.03    0.00    0.03     0  kworker/0:0
12:54:50 PM     0         6    0.00    0.02    0.00    0.02     0  kworker/u2:0
12:54:50 PM     0         7    0.00    0.16    0.00    0.16     0  rcu_sched
12:54:50 PM     0        26    0.00    0.03    0.00    0.03     0  kworker/u2:1
12:54:50 PM     0        60    0.00    0.00    0.00    0.00     0  scsi_eh_1
12:54:50 PM     0       129    0.00    0.00    0.00    0.00     0  kworker/0:1H
12:54:50 PM     0       266    0.00    0.00    0.00    0.00     0  jbd2/vda1-8
12:54:50 PM     0       315    0.02    0.01    0.00    0.03     0  systemd-journal
12:54:50 PM     0       383    0.02    0.00    0.00    0.02     0  systemd-udevd
12:54:50 PM     0       649    0.01    0.01    0.00    0.02     0  accounts-daemon
12:54:50 PM   107       652    0.01    0.00    0.00    0.01     0  dbus-daemon
12:54:50 PM     0       736    0.00    0.00    0.00    0.00     0  systemd-logind
12:54:50 PM   104       738    0.00    0.00    0.00    0.00     0  rsyslogd
12:54:50 PM     0       817    0.00    0.00    0.00    0.01     0  polkitd
12:54:50 PM     0       823    0.00    0.00    0.00    0.00     0  sshd
12:54:50 PM     0       842    0.00    0.00    0.00    0.00     0  iscsid
12:54:50 PM     0       843    0.01    0.01    0.00    0.01     0  iscsid
12:54:50 PM     0       949    0.00    0.01    0.00    0.01     0  agetty
12:54:50 PM     0      1167    0.01    0.01    0.00    0.01     0  sshd
12:54:50 PM     0      1169    0.00    0.00    0.00    0.01     0  systemd
12:54:50 PM     0      1234    0.01    0.01    0.00    0.01     0  sshd
12:54:50 PM     0      1267    0.01    0.00    0.00    0.01     0  bash
12:54:50 PM     0      2300    0.00    0.00    0.00    0.00     0  kworker/u2:2