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Operating Systems Linux Linux Total Processes - Why monitor it? Post 302924359 by Scrutinizer on Saturday 8th of November 2014 09:48:10 AM
Old 11-08-2014
In this case what you monitor is typical behavior. Given a normal bandwith of number of process (which needs to be tuned for the system), you may want to be informed or warned if there are suddenly an x percentage more than usual and maybe get a critical message if the number of processes exceeds yet another treshold.

It may indicate a problem that perhaps can be corrected before the system runs out of CPU or typically memory (or bump into another limit like a kernel parameter that prevents new processes from getting started). Another thing is that if the system runs out of CPU or memory, this metric will provide you with additional information that may help you determine the nature of a problem...

Last edited by Scrutinizer; 11-08-2014 at 10:53 AM..
 

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MEMORY_PRESSURE(1)					    BSD General Commands Manual 					MEMORY_PRESSURE(1)

NAME
memory_pressure -- Tool to apply real or simulate memory pressure on the system. SYNOPSIS
memory_pressure [-l level] | [-p percent_free] | [-S -l level] OPTIONS
-l <level> Apply real or simulate memory pressure (if specified alongside simulate argument) on the system till low memory notifications cor- responding to <level> are generated. Supported values are "warn" and "critical". -p <percent_free> Allocate memory till the available memory in the system is <percent_free> of total memory. If the percentage of available memory to total memory on the system drops, the tool will free memory till either the desired percentage is achieved or it runs out of memory to free. -S Simulate memory pressure on the system by placing it artificially for <sleep_seconds> duration at the "warn" or "critical" level. -s <sleep_seconds> Duration to wait before allocating or freeing memory if applying real pressure. In case of simulating memory pressure, this is the duration the system will be maintained at an artifical memory level. DESCRIPTION
A tool to apply real or simulate memory pressure on the system SEE ALSO
vm_stat(1) Mac OS X Mar 7, 2013 Mac OS X
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