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Questions tagged [sar]

System Activity Report: a Unix/Linux command to display various system loads (Wikipedia).

sar is a widely used system load monitor in POSIX.

Sar shows current status of memory, CPU load and network usage, and it can log the load statistics over time.

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High I/O wait in apache tomcat server

Facing high I/O wait in apache tomcat server when the load increases. Suspecting disk I/O is less when tomcat is running however. disk IO seems drops drastically when tomcat is running along with the load. Other resources(CPU,RAM) are under…
Sandesh Bailur
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sar and top show high cpu usage, but vmstat and ps show low cpu usage. Why?

I'm diagnosing a high CPU usage event, and I found a weird difference between numbers from ps/vmstat, which show almost 0%, and sar/top, which show almost 100% (user + system): sar 1 5 Linux 2.6.9-67.ELsmp (uxdfl712) 07/25/2020 01:48:31 PM …
Emerson Prado
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Stop sysstat sar

How to stop sar collecting system activity without uninstalling sysstat? I have used systemctl stop sysstat but as I understand from running sar it continues collecting system activity.
Ali Kerimli
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After installing sysstat on an AWS EC2 instance: kernel: ena: Feature 27 isn't supported

After installing and enabling sysstat on an AWS EC2 instance I get the following log entries everytime sysstat is run (from the cronjob in /etc/cron.d/sysstat) in my /var/log/syslog file on Debian: kernel: [95827.487657] ena: Feature 27 isn't…
manifestor
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How to find DEVICE on which read per second (rd_sec/s) is highest?

I am using awk to find out DEVICE on which read per second (rd_sec/s) is highest, (from SAR file) below is my command : # sar -d -f sa28 | awk '{print $3,$4}' |sort -k1,1n Output is showing on console with sorted manner, But I want the exact one…
Vin
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