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What does the fields in sar -B output mean?
The sar manpage says : pgpgin/s – Total number of kilobytes the system paged in from disk per second. pgpgout/s – Total number of kilobytes the system paged out to disk per second. fault/s – Number of...
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Tool to show summarized cpu usage per user
I once saw report that contained information, that within given time frame, total number of x cpu minutes, were used, and this was: – afterwards was list of uids (or usernames), and total number of...
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top command indicates a different cpu usage than sar command
In my CentOS server, when I check the resources with sar command, user cpu usage is around %15 while in top command the sole ‘java’ process uses like %99 of cpu. sometimes it’s even goes further than...
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Sar data not collected for 10 minutes
We have a RedHat server whose only job is to run a JBoss server. Monitors said that memory usage spiked (we have the JVM limited to far less than the total memory on the system) and JBoss crashed. We...
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CRON opens and closes sessions continuously
I’m seeing a huge amount of these lines in my auth logs: Dec 31 03:45:01 xxxxxxx CRON[17259]: pam_unix(cron:session): session opened for user root by (uid=0) Dec 31 03:45:01 xxxxxxx CRON[17259]:...
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