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,
- For how long when system is running above these thresholds I can say the system is indeed overloaded.
- What is the appropriate sampling rate ?
Any further suggestion ?
Thanks!
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CPU(1) General Commands Manual CPU(1)
NAME
cpu - connection to cpu server
SYNOPSIS
cpu [ -h server ] [ -c cmd args ... ]
DESCRIPTION
Cpu starts an rc(1) running on the server machine, or the machine named in the $cpu environment variable if there is no -h option. Rc's
standard input, output, and error files will be /dev/cons in the name space where the cpu command was invoked. Normally, cpu is run in an
81/2(1) window on a terminal, so rc output goes to that window, and input comes from the keyboard when that window is current. Rc's cur-
rent directory is the working directory of the cpu command itself.
The name space for the new rc is an analogue of the name space where the cpu command was invoked: it is the same except for architecture-
dependent bindings such as /bin and the use of fast paths to file servers, if available.
If a -c argument is present, the remainder of the command line is executed by rc on the server, and then cpu exits.
The name space is built by running /usr/$user/lib/profile with the root of the invoking name space bound to /mnt/term. The service envi-
ronment variable is set to cpu; the cputype and objtype environment variables reflect the server's architecture.
FILES
The name space of the terminal side of the cpu command is mounted on the CPU side on directory /mnt/term.
SOURCE
/sys/src/cmd/cpu.c
SEE ALSO
rc(1), 81/2(1)
BUGS
Binds and mounts done after the terminal lib/profile is run are not reflected in the new name space.
CPU(1)