System activity reports can be generated from a logfile by using the atopsar command. Use the cat command to display the data held in /proc/cpuinfo.

When CPU usage reaches critical levels for a period of time, systemd alerts you of this. By default, the daily logfiles are preserved for 28 days. Cumulus Linux uses systemd to monitor system health, including high CPU. 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.

Linux cpu usage