{{tag>PUB Perf}}

= Notes sysstat sar

Voir :
* https://www.linuxjournal.com/content/how-use-sar-system-activity-reporter

Voir aussi :
* [[notes atop]]
* nmon


== Install

<code bash>
apt-get update
apt-get install sysstat
</code>

''/etc/default/sysstat''
<code ini>
ENABLED="true"
</code>

<code ->
# service sysstat restart
Starting the system activity data collector: sadc.
</code>


== Utilisation

<code ->
$ 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
</code>

Report CPU utilization
<code bash>
sar -u ALL
</code>

Report per-processor CPU utilization
<code bash>
sar -P ALL
</code>

Display all CPU utilization per 2 seconds 3 times
<code bash>
mpstat -P ALL 2 3

# mpstat -A 1
</code>

Report memory utilization
<code bash>
sar -r ALL
</code>


Report swap space utilization
<code bash>
sar -S
</code>


Report hugepages utilization
<code bash>
sar -H
</code>

Report paging statistics
<code bash>
sar -B
</code>

Report swapping statistics
<code bash>
sar -W
</code>

Report I/O and transfer rate statistics
<code bash>
sar -b
</code>

Report block device activity
<code bash>
sar -d
</code>

Report process creation and system switching activity
<code bash>
sar -w
</code>

Report queue length and load averages
<code bash>
sar -q
</code>

Display I/O disk with Mega bytes per 2 seconds
<code bash>
iostat -mx -d 2 
</code>

Report network utilization
<code bash>
sar -n ALL
</code>

Display I/O and network per 2 seconds 5 times
<code bash>
sar -b -n DEV 2 5
</code>

Display data in human readable way
<code bash>
sar -r -h
</code>

Display memory utilization of specific process per a second 3 times
<code bash>
pidstat -r -p 21090 1 3 
</code>


Charge sur une période donnée
<code 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
</code>


Un peu de couleurs
<code bash>
env S_COLORS=always sar -A | less -R -S
env S_COLORS=always sar -n DEV | grep --color=never eth0
</code>

Voir aussi :
* dircolors


=== Autres

Réseaux
<code bash>
sar -n ALL
sar -n DEV
sar -n TCP
sar -n ETCP
sar -n IP
sar -n EIP
</code>

Disques
<code bash>
iostat -p -x
</code>


== Configuration

=== Timer

<code bash>
# systemctl edit --full sysstat-collect.timer

systemctl cat sysstat-collect.timer
</code>

''/usr/lib/systemd/system/sysstat-collect.timer''
<code 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
</code>

<code bash>
systemctl edit sysstat-collect.timer
</code>

''/etc/systemd/system/sysstat-collect.timer.d/override.conf''
<code ini>
[Unit]
Description=Run system activity accounting tool every 5 minutes

[Timer]
OnCalendar=
OnCalendar=*:5/5
</code>



== Pb

<code bash>
# sar -n TCP
Requested activities not available in file /var/log/sa/sa31
</code>

''/etc/sysconfig/sysstat''
<code 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"
</code>

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.