Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:notes_sysstat [2025/03/24 15:06] – créée - modification externe 127.0.0.1
+++ tech:notes_sysstat [2026/06/07 19:12] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>PUB Perf}}
+# Notes sysstat sar
+Voir :
+* https://www.linuxjournal.com/content/how-use-sar-system-activity-reporter
+Voir aussi :
+* [[notes atop]]
+* nmon
+## Install
+~~~bash
+apt-get update
+apt-get install sysstat
+~~~
+`/etc/default/sysstat`
+~~~ini
+ENABLED="true"
+~~~
+~~~
+# service sysstat restart
+Starting the system activity data collector: sadc.
+~~~
+## Utilisation
+~~~
+$ dpkg -L sysstat | grep 'bin/'
+/usr/bin/nfsiostat
+/usr/bin/pidstat
+/usr/bin/sadf
+/usr/bin/iostat
+/usr/bin/mpstat
+/usr/bin/sar.sysstat
+/usr/bin/cifsiostat
+~~~
+Report CPU utilization
+~~~bash
+sar -u ALL
+~~~
+Report per-processor CPU utilization
+~~~bash
+sar -P ALL
+~~~
+Display all CPU utilization per 2 seconds 3 times
+~~~bash
+mpstat -P ALL 2 3
+# mpstat -A 1
+~~~
+Report memory utilization
+~~~bash
+sar -r ALL
+~~~
+Report swap space utilization
+~~~bash
+sar -S
+~~~
+Report hugepages utilization
+~~~bash
+sar -H
+~~~
+Report paging statistics
+~~~bash
+sar -B
+~~~
+Report swapping statistics
+~~~bash
+sar -W
+~~~
+Report I/O and transfer rate statistics
+~~~bash
+sar -b
+~~~
+Report block device activity
+~~~bash
+sar -d
+~~~
+Report process creation and system switching activity
+~~~bash
+sar -w
+~~~
+Report queue length and load averages
+~~~bash
+sar -q
+~~~
+Display I/O disk with Mega bytes per 2 seconds
+~~~bash
+iostat -mx -d 2
+~~~
+Report network utilization
+~~~bash
+sar -n ALL
+~~~
+Display I/O and network per 2 seconds 5 times
+~~~bash
+sar -b -n DEV 2 5
+~~~
+Display data in human readable way
+~~~bash
+sar -r -h
+~~~
+Display memory utilization of specific process per a second 3 times
+~~~bash
+pidstat -r -p 21090 1 3
+~~~
+Charge sur une période donnée
+~~~bash
+sar -q -f /var/log/sa/sa27 -s 16:00:00 -e 17:00:00
+sar -A -f /var/log/sa/sa27 -s 16:00:00 -e 17:00:00
+~~~
+Un peu de couleurs
+~~~bash
+env S_COLORS=always sar -A | less -R -S
+env S_COLORS=always sar -n DEV | grep --color=never eth0
+~~~
+Voir aussi :
+* dircolors
+### Autres
+Réseaux
+~~~bash
+sar -n ALL
+sar -n DEV
+sar -n TCP
+sar -n ETCP
+sar -n IP
+sar -n EIP
+~~~
+Disques
+~~~bash
+iostat -p -x
+~~~
+## Configuration
+### Timer
+~~~bash
+# systemctl edit --full sysstat-collect.timer
+systemctl cat sysstat-collect.timer
+~~~
+`/usr/lib/systemd/system/sysstat-collect.timer`
+~~~ini
+# /usr/lib/systemd/system/sysstat-collect.timer
+# (C) 2014 Tomasz Torcz <tomek@pipebreaker.pl>
+#
+# sysstat-11.7.3 systemd unit file:
+#        Activates activity collector every 10 minutes
+[Unit]
+Description=Run system activity accounting tool every 10 minutes
+[Timer]
+OnCalendar=*:00/10
+[Install]
+WantedBy=sysstat.service
+~~~
+~~~bash
+systemctl edit sysstat-collect.timer
+~~~
+`/etc/systemd/system/sysstat-collect.timer.d/override.conf`
+~~~ini
+[Unit]
+Description=Run system activity accounting tool every 5 minutes
+[Timer]
+OnCalendar=
+OnCalendar=*:5/5
+~~~
+## Pb
+~~~bash
+# sar -n TCP
+Requested activities not available in file /var/log/sa/sa31
+~~~
+`/etc/sysconfig/sysstat`
+~~~bash
+# Parameters for the system activity data collector (see sadc(8) manual page)
+# which are used for the generation of log files.
+# By default contains the `-S DISK' option responsible for generating disk
+# statisitcs. Use `-S XALL' to collect all available statistics.
+SADC_OPTIONS="-S XALL"
+~~~
+Important  note:  The activities (including optional ones) saved in an existing data file prevail over those selected with option -S.  As a consequence, appending data to an existing data file will result in option -S being ignored.