Query on RAM Memory Post: 302559453

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Operating Systems Linux Red Hat Query on RAM Memory Post 302559453 by Tommyk on Tuesday 27th of September 2011 05:59:53 AM

09-27-2011

Registered User

%memused is worked out based on %memfree of total RAM, although you may see it as used from the outputs, cached is by no means anywhere near to used. You cannot use this value for monitoring until your no longer using cache.

If you reboot your machine it will clear the cached memory down, however you can't reboot your machine every 5 minutes to keep that low as cache builds up again.

I have a server with 32GB RAM, its only using 2GB and 29GB is cached, showing 1GB free, however if an application requires more memory it will used cached memory before it goes into swap.

Quote:

I have to find out some way to fix it...

I think you need to think again about this, it is not a problem that needs fixing, this is your box running at its optimal performance. Your alarm is triggered due to a result that is not entirely representative of what your looking for.

Tommyk

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vzcalc

vzcalc(8)							    Containers								 vzcalc(8)

NAME

       vzcalc - calculate resource usage of a container

SYNOPSIS

       vzcalc [-v] CTID

DESCRIPTION

       This  utility  displays	the  share  of the host system resources a particular container is using. If the container is running, the current
       usage is displayed. High utilization values (>100%) mean the system is overloaded (or the container has an invalid configuration).

       Current
	      Shows the amount of the resources consumed by the container at a given time.

       Promised
	      Shows the resources soft limit values "promised" for a given container.

       Max    Shows the resources hard limit values "promised" for a given container.

       If the -v option is specified, the following additional information is also displayed:

       Low Mem
	      The part of memory residing at lower addresses and directly accessed by the kernel (only makes sense for 32-bit architectures).

       Total RAM
	      Total memory.

       Mem+Swap
	      Amount of memory available for applications (both RAM and swap space).

       Alloc Mem
	      Standard memory allocations made for applications in a container.  This is a more "virtual" system resource  than  RAM  or  RAM  and
	      swap.

       Num. Proc
	      Number of processes.

OPTIONS

       -v     Display additional information.

EXIT STATUS

       Normally, the exit status is 0. On error, the exit status is 1.

LICENSE

       Copyright (C) 2000-2009, Parallels, Inc. Licensed under GNU GPL.

OpenVZ								    10 Dec 2009 							 vzcalc(8)

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