How do I view sar logs?

Report Sar Data Using Start Time (sar -s) When you view historic sar data from the /var/log/sa/saXX file using “sar -f” option, it displays all the sar data for that specific day starting from 12:00 a.m for that day. Using “-s hh:mi:ss” option, you can specify the start time.

Where is the sar file is located and why we use sar?

As we have discuss that sar logs files are kept under /var/log/sa/saDD, using -f option in sar command we can read the log files.

What is sar history?

Originally called a “criminal referral form” the SAR became the standard form to report suspicious activity in 1996. Mainly used to help financial institutions detect and report known or suspected violations, the USA Patriot Act expanded SAR requirements to help combat domestic and global terrorism.

Where does the SAR command save the data?

If file name is omitted, sar uses the standard system activity daily data file, the /var/log/sysstat/sadd file, where the dd parameter indicates the current day. By default, all the data available from the kernel are saved in the data file. The sar command extracts and writes to standard output records previously saved in a file.

Where to find SAR logs in Sadd file?

As we have discuss that sar logs files are kept under /var/log/sa/saDD, using -f option in sar command we can read the log files. [ root@localhost ~]# sar -r -f /var/log/sa/sa26 Read Also: How to Sync Time in Linux Server using Chrony Read Also : 20 ps Command Examples to Monitor Linux Processes

How to view past performance with SAR in Linux?

One can change the historical sar data retention using the file /etc/sysconfig/sysstat or /etc/sysstat/sysstat. Change the HISTORY parameter setting to the desired amount of days to retain data. For example, to keep 28 days of records, we could use this: # cat /etc/sysconfig/sysstat # sysstat-9.0.4 configuration file.

What does SAR mean in sysstat for Linux?

sar followed by an option (without specifying a saXX data file). This will look for the current day’s saXX data file and report the performance data that was recorded until that point for the current day. sar followed by an option, and additionally specifying a saXX data file using -f option.