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UNIX for Advanced & Expert Users
How often should I monitor the CPU and memory usage ?
Post 302346294 by qiulang on Friday 21st of August 2009 12:04:43 PM
08-21-2009
sampling rate
Thanks for the reply. And my system is indeed AIX (Power server). How did you know that ? COOL!!
I am not sure exactly why my customer want to monitor the cpu/memory usage. Maybe they want their system to be "stable" because the requirement says when cpu usage is above X% or memory usage is above Y% I should reject the further request. ( Y is actually 70!! Nice guess again
)
Or maybe they want to monitor to get a general sense of what the system is doing.
To me I just need to figure 2 things out,
Any further suggestion ?
Thanks!
I am not sure exactly why my customer want to monitor the cpu/memory usage. Maybe they want their system to be "stable" because the requirement says when cpu usage is above X% or memory usage is above Y% I should reject the further request. ( Y is actually 70!! Nice guess again
)Or maybe they want to monitor to get a general sense of what the system is doing.
To me I just need to figure 2 things out,
- For how long when system is running above these thresholds I can say the system is indeed overloaded.
- What is the appropriate sampling rate ?
Thanks!
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LEARN ABOUT CENTOS
ip-monitor
IP-MONITOR(8) Linux IP-MONITOR(8) NAME
ip-monitor, rtmon - state monitoring SYNOPSIS
ip [ ip-OPTIONS ] monitor [ all | OBJECT-LIST ] [ file FILENAME ] DESCRIPTION
The ip utility can monitor the state of devices, addresses and routes continuously. This option has a slightly different format. Namely, the monitor command is the first in the command line and then the object list follows: ip monitor [ all | OBJECT-LIST ] [ file FILENAME ] OBJECT-LIST is the list of object types that we want to monitor. It may contain link, address, route, mroute, prefix, neigh and netconf. If no file argument is given, ip opens RTNETLINK, listens on it and dumps state changes in the format described in previous sections. If the file option is given, the program does not listen on RTNETLINK, but opens the given file, and dumps its contents. The file should contain RTNETLINK messages saved in binary format. Such a file can be generated with the rtmon utility. This utility has a command line syntax similar to ip monitor. Ideally, rtmon should be started before the first network configuration command is issued. F.e. if you insert: rtmon file /var/log/rtmon.log in a startup script, you will be able to view the full history later. Nevertheless, it is possible to start rtmon at any time. It prepends the history with the state snapshot dumped at the moment of starting. SEE ALSO
ip(8) AUTHOR
Original Manpage by Michail Litvak <mci@owl.openwall.com> iproute2 13 Dec 2012 IP-MONITOR(8)