Question on output of ipcs command Post: 302444527

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Top Forums UNIX for Advanced & Expert Users Question on output of ipcs command Post 302444527 by newbie_01 on Thursday 12th of August 2010 05:18:31 AM

08-12-2010

Registered User

Hi citaylor,

Thanks for your response, now that you explained it, I think ipcs is not what am after.

I want to know how much memory I have, how much is used and how much is free. Running top, I get the output as below:

Code:

Memory: 8192M phys mem, 72G free mem, 179G swap, 179G free swap

This is a Solaris zone/container and the server has been assigned 8192M and the available memory for the whole zone/container is presumably 72G.

I thought if I run vmstat, it will show me how much of the 8192M is free but sadly that does not seem to be the case.

The output of vmstat command is as below.

The free seems to be for the whole Solaris container or am I wrong and should be calculating free as the value from vmstat minus the 72GB from the top command and that should give me how much of the 8129M is free?

In short, should I be calculating the free memory of the server as the (value of free from vmstat) - (value of free from top)

Any advise will be very much appreciated. Thanks in advance.

Code:

vmstat 5 10
 kthr      memory            page            disk          faults      cpu
 r b w   swap  free  re  mf pi po fr de sr lf s0 s1 s2   in   sy   cs us sy id
 0 4 0 253043824 92076232 14 42 15 0 0 0 0  0  0 10  0  384  634  212  2  3 94
 0 0 0 241363080 75768528 97 437 0 0 0 0 0  0  0  0  0   27 4770   63  3  7 89
 0 0 0 241337320 75743496 1 1 0 0  0  0  0  0  0  0  0   21 3925  103  1  4 95
 0 0 0 241329560 75735840 1 1 0 0  0  0  0  0  0  0  0   21 3531   26  2  4 95
 0 0 0 241357368 75764896 1 13 0 0 0  0  0  0  0 22  0   22 3560   56  1  4 95
 0 0 0 241341368 75772552 1 1 0 0  0  0  0  0  0  0  0   21 3501   20  2  3 95
 0 0 0 241357296 75774792 1 1 0 0  0  0  0  0  0 16  0   20 3652   27  1  4 95
 0 0 0 241364880 75779976 97 432 0 0 0 0 0  0  0  0  0   29 4584   66  3  8 89
 2 0 0 241364352 75779920 11 48 0 0 0 0  0  0  0  0  0   24 4018  128  2  4 94
 0 0 0 241358424 75774752 1 1 0 0  0  0  0  0  0  0  0   44 3482   21  1 29 70

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LEARN ABOUT LINUX

ipcs

IPCS(1) 						     Linux Programmer's Manual							   IPCS(1)

NAME

       ipcs - provide information on ipc facilities

SYNOPSIS

       ipcs [-asmq] [-tclup]
       ipcs [-smq] -i id
       ipcs -h

DESCRIPTION

       ipcs provides information on the ipc facilities for which the calling process has read access.

       The -i option allows a specific resource id to be specified.  Only information on this id will be printed.

       Resources may be specified as follows:

       -m     shared memory segments

       -q     message queues

       -s     semaphore arrays

       -a     all (this is the default)

       The output format may be specified as follows:

       -t     time

       -p     pid

       -c     creator

       -l     limits

       -u     summary

SEE ALSO

       ipcrm(1), ipcmk(1)

CONFORMING TO

       The  Linux  ipcs  utility is not fully compatible to the POSIX ipcs utility.  The Linux version does not support the -b and -o options, but
       does support the -l and -u options not defined by POSIX. The portable application shall not use the -a, -b, -o, -l, and -u options.

AUTHOR

       krishna balasubramanian (balasub@cis.ohio-state.edu)

AVAILABILITY

       The ipcs command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

Linux 0.99							  9 October 1993							   IPCS(1)

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