![]() We will also discuss how to interpret the data and use it to make informed decisions about your system’s performance. In this article, we’ll discuss how to check the previous day’s CPU utilization in Linux, including tips for understanding the results and troubleshooting any potential issues. Checking the CPU utilization of the past day is especially useful when you want to get an overview of how your system is performing over time. System activity reports can be generated from a logfile by using the atopsar command.If you are a Linux user, you may have come across the need to check your CPU utilization in order to ensure your system is running optimally and identify any potential issues with your hardware or software. By default, the daily logfiles are preserved for 28 days. You can then import this data for analysis, using either a spreadsheet program or a custom tool like sargraph.Īn alternative is to use atop which is able to store raw counters in a file for long-term analysis on system level and process level. Sysstat will collect background CPU usage data every minute, saving it to /var/log/sysstat/. You can generate a real-time report with the following command: sar -u 1 3 You can modify this behavior by editing the sysstat crontab at /etc/cron.d/sysstat, or by changing rotation settings in the sysstat settings at /etc/sysstat/sysstat. ![]() Next, enable it by editing /etc/default/sysstat and setting “ENABLED” to true.ĭoing so monitors your system and generates a report every 10 minutes, rotating them out after a week.
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