You can use the following shortcut keys to sort the list of process: This key works only when the netatop kernel module installed. You can press shortcut keys to view different statistics. The atop tool skips to the time specified in the Enter new time variable: NET | lo - | pcki 2 | pcko 2 | sp 0 Mbps | si 0 Kbps | so 0 Kbps | erro 0 | To analyze a specific time slot, press the b key and then enter the date and time. To move back to the previous snapshot, press the T key (uppercase). To move forward to the next snapshot, press the t key (lowercase) on the keyboard. In the preceding output example, the first recorded snapshot was at 2 17:03:44. PRC | sys 6.51s | user 7.85s | #proc 103 | #tslpi 81 | #tslpu 0 | #zombie 0 | #exit 0 |ĬPU | sys 0% | user 3% | irq 0% | idle 197% | wait 0% | ipc notavail | curscal ?% |Ĭpu | sys 0% | user 1% | irq 0% | idle 98% | cpu000 w 0% | ipc notavail | curscal ?% |Ĭpu | sys 0% | user 1% | irq 0% | idle 98% | cpu001 w 0% | ipc notavail | curscal ?% | The command and log file appear as displayed in the following example: atop -r /var/log/atop/atop_20210902ĪTOP - ip-172-20-139-91 2 17:03:44 - 3h33m7s elapsed Replace atoplogfilepath with the full path to the atop log file.
To access the log file, run the command atop -r atoplogfilepath. For example, atop_20210902 is the recording for September 2, 2021. These files are named in the following format: atop_ccyymmdd. The atop tool creates log files in /var/log/atop. Resolution Install atopįor installation instructions, see How do I configure the ATOP and SAR monitoring tools for my EC2 instance running Amazon Linux, RHEL, CentOS, or Ubuntu? Read atop report logs for historical review and analysis Historical performance data about processes can't be retrieved before the date of atop's installation. Note: Atop starts logging data only after it's installed. The stats are stored for 28 days, by default. The atop tool stays active as a background service while it records the stats, allowing for long-term server analysis. You can retrieve usage for CPU utilization, memory consumption, and disk I/O for each process and thread. This tool can also do real-time reporting. The atop tool is a performance monitoring tool that records historical resource usage for later analysis.
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