RHEL 9でSysstatの設定を確認します。
Sysstatのデータ保存に関する設定を確認する！
Sysstatのデータ保存に関する設定は、「/etc/sysconfig/sysstat」を確認します。ファイルの保存先が「/var/log/sa」で、圧縮方法が「xz」であることなどがわかります。
$ cat /etc/sysconfig/sysstat
# sysstat-12.5.4 configuration file.
# How long to keep log files (in days).
# If value is greater than 28, then use sadc's option -D to prevent older
# data files from being overwritten. See sadc(8) and sysstat(5) manual pages.
HISTORY=28
# Compress (using xz, gzip or bzip2) sa and sar files older than (in days):
COMPRESSAFTER=31
# Parameters for the system activity data collector (see sadc manual page)
# which are used for the generation of log files.
SADC_OPTIONS=" -S DISK"
# Directory where sa and sar files are saved. The directory must exist.
SA_DIR=/var/log/sa
# Compression program to use.
ZIP="xz"
# By default sa2 script generates yesterday's summary, since the cron job
# usually runs right after midnight. If you want sa2 to generate the summary
# of the same day (for example when cron job runs at 23:53) set this variable.
#YESTERDAY=no
# By default sa2 script generates reports files (the so called sarDD files).
# Set this variable to false to disable reports generation.
#REPORTS=false
# Tell sa2 to wait for a random delay in the range 0 .. ${DELAY_RANGE} before
# executing. This delay is expressed in seconds, and is aimed at preventing
# a massive I/O burst at the same time on VM sharing the same storage area.
# Set this variable to 0 to make sa2 generate reports files immediately.
DELAY_RANGE=0
# The sa1 and sa2 scripts generate system activity data and report files in
# the /var/log/sa directory. By default the files are created with umask 0022
# and are therefore readable for all users. Change this variable to restrict
# the permissions on the files (e.g. use 0027 to adhere to more strict
# security standards).
UMASK=0022
Sysstatのデータ取得タイミングの設定を確認する！
Sysstatのデータ取得タイミングの設定は、「/lib/systemd/system/sysstat-collect.timer」を確認します。以下の内容から10分おきに取得していることがわかります。
$ cat /lib/systemd/system/sysstat-collect.timer # /usr/lib/systemd/system/sysstat-collect.timer # (C) 2014 Tomasz Torcz <tomek@pipebreaker.pl> # # sysstat-12.5.4 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
おわりに
RHEL 9のSysstatの設定は、「/etc/sysconfig/sysstat」を確認します。sarコマンドで、過去分のデータを表示する場合にも確認が必要になります。
関連記事
関連書籍（Amazon）
