View Past Performance Data With sar
sysstat stores past data in the directory
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/var/log/sa - for RHEL based OS /var/log/sysstat - for Debian based OS |
Each day log files are stored in a file with the respective date.
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sa01 - log file for day 1 sa31 - log file for day 31 |
To view logs for day 9, run
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sar -f /var/log/sa/sa09 |
If you want to see entries during a specific time, you can use
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sar -f /var/log/sa/sa09 -s hh:mm:ss |
Example
You can specify end time with -e option
If you want to see IO data, use -b option
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sar -f /var/log/sa/sa09 -b |