08-20-2009
Hi,
which OS do you run - I assume it's AIX? And why do you want to do it at all - are you running so low in resources that a simple command execution / a running process will put your system into trouble? Or do you expect your application to be so badly written that it will negatively impact the system for a certain amount of time?
If it's AIX, vmstat or sar or any kind of command collecting once off data will not impact your performance at all, while interactive monitoring tools like topas or nmon will. On unix you should not average anything since the resource usage is 'at a given moment in time' and will change about 1000 times per second anyway - so most of these tools are internal averaging the interval between executions.
Saying this, where would you set your threshold anyway. AIX using vmm and constantly re-nicing its processes, is absolutely capable to run in (and depending hardware/setup/virtualization overrun) its cpu entitlement without any kind of problems - and if you're overutilizing your memory for a short time, and your system is properly tuned, this will not slow down your system either (an AIX box with proper sizing and 'enough' memory uses normally 70-80% memory computational and gives you the headroom of 20% memory for peak times).
Not knowing your system / application at all, I would say 'it depends on how long you expects your threads to run and what they're doing overall' - on a DB box I would monitor the system in 1 - 2 second intervals for using all resources more than 3 intervals - but as stated - when I use virtualization and have a large shared pool where I can get 1000% cpu in case I need it, I just don't have to monitor it at all. And if you have p6 systems and large shared memory pools, too - I would not even do it for memory.
zxmaus
10 More Discussions You Might Find Interesting
1. Programming
how can i monitor usages of CPU, Memory, Hard disk etc. under SUN Solaries
through a c program or java program
i want to store that data into database so i can show it graphically
thanks in advance (2 Replies)
Discussion started by: Gajanad Bihani
2 Replies
2. Programming
Please tell me solaris functions/api for getting following information
1- Function that tells how much memory used by current process
2- Function that tells how much memory used by all running processes
3- Function that tells how much CPU is used by current process
4- Function that tells how... (1 Reply)
Discussion started by: mansoorulhaq
1 Replies
3. UNIX for Dummies Questions & Answers
Hi All,
Does anyone know what the best commands in the UNIX command line are for obtaining this info:
current CPU usage
memory usage
virtual memory usage
preferably with date and time parameters too?
thanks
ocelot (4 Replies)
Discussion started by: ocelot
4 Replies
4. HP-UX
how can I find cpu usage memory usage swap usage and
I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times
my final destination is monitor process
logical volume usage above X % and number of Logical voluage above
can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies
5. Solaris
Hi,
I want to monitor the current cpu usage, monitor usage , disk I/o and network utlization for solaris using SNMP.
I want the oids for above tasks.
can you please tell me that
Thank you (2 Replies)
Discussion started by: S_venkatesh
2 Replies
6. AIX
How to monitor the IBM AIX server for I/O usage, memory usage, CPU usage, network usage, storage usage? (3 Replies)
Discussion started by: laknar
3 Replies
7. UNIX for Dummies Questions & Answers
hi guys
I am having a doubt about memory monitoring on linux system
what I should be monitoring? memory usage? o swap usage?
I am using some monitoring tools but I am confused to what monitor for alerting
for example this case
looks the memory usage is very high and it's like that all... (2 Replies)
Discussion started by: karlochacon
2 Replies
8. AIX
Hello,
Looking for some help. I am trying to gather data at each server showing when the physical CPU is being used the most based on a weekly timeframe.
I know this data can be seen through NMON but with multiple servers in our environment it could take a real long time. is there a easier... (4 Replies)
Discussion started by: audis$
4 Replies
9. AIX
Hello.
I am using AIX 6 and did lot of searches on google for this script and found so many results. Just thought to ask you being the real good place for centralised answer:
a) Could you tell me the aix script, which may tell me If the CPU load is above e.g. 60% ?
b) Could you tell me the AIX... (2 Replies)
Discussion started by: panchpan
2 Replies
10. Shell Programming and Scripting
Hi ,
Please some one help me How to write a shell script to monitor cpu usage vmstat in Redhat linux .
Thanks, (4 Replies)
Discussion started by: saanvi
4 Replies
LEARN ABOUT HPUX
serialize
serialize(2) System Calls Manual serialize(2)
NAME
serialize() - force target process to run serially with other processes
SYNOPSIS
DESCRIPTION
The system call is used to force the target process referenced by the pid value passed in to run serially with other processes also marked
for serialization. If the value of pid is zero, then the currently running process is marked for serialization. Once a process has been
marked by the process stays marked until process completion, unless is reissued on the serialized process with timeshare set to 1. If
timeshare is set to 1, the process specified in pid will be returned to normal timeshare scheduling algorithms.
This call is used to improve process throughput since process throughput usually increases for large processes when they are executed seri-
ally instead of allowing each program to run for only a short period of time. By running large processes one at a time, the system makes
more efficient use of the CPU as well as system memory, since each process does not end up constantly faulting in its working set, to only
have the pages stolen when another process starts running. As long as there is enough memory in the system, processes marked by behave no
differently from other processes in the system. However, once memory becomes tight, processes marked by are run one at a time with the
highest priority processes being run first. Each process runs for a finite interval of time before another serialized process is allowed
to run.
RETURN VALUE
returns zero upon successful completion, or nonzero if the system call failed.
ERRORS
If fails, it sets (see errno(2)) to the following value:
The pid passed in does not exist.
WARNINGS
The user has no way of forcing an execution order on serialized processes.
AUTHOR
was developed by HP.
SEE ALSO
serialize(1), privileges(5).
serialize(2)