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Full Discussion: RHEL Memory issue
Operating Systems Linux Red Hat RHEL Memory issue Post 302976990 by baluchen on Sunday 10th of July 2016 10:53:26 AM
Old 07-10-2016
RHEL Memory issue
Friends,

I have 8CPU/24gb RAM in my Linux servers around 30+. All the servers are running with Java based application with NFS mounted.

The problem what I have is, When I reboot servers the server memory looks decent. But after some time the "cached" memory increasing and "free" memory getting reduced and reaching some mega bytes. I searched in various forums that it is behavior for RHEL and there wont be any performance issue. But I see better performance when there is more memory available in "free". The same performance goes down when the "free" memory reach 300mb.

Code:
$ free -g
             total       used       free     shared    buffers     cached
Mem:            23         23          0          0          0          9
-/+ buffers/cache:         13         10
Swap:            1          0          1
$ free -m
             total       used       free     shared    buffers     cached
Mem:         24248      23756        492          0        233       9684
-/+ buffers/cache:      13838      10409
Swap:         2047        214       1833
$

I need your expert advice why the cached memory is increasing.. and how I set threshold so that I will always have 1-2gb free.?

Thank you
Bala
 

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LEARN ABOUT SUNOS

list-virtual-servers

asadmin-list-virtual-servers(1AS)				   User Commands				 asadmin-list-virtual-servers(1AS)

NAME

       asadmin-list-virtual-servers, list-virtual-servers - gets the virtual servers

SYNOPSIS

       list-virtual-servers --user admin_user [--password admin_password] [--host localhost] [--port 4848] [--secure|-s] [--passwordfile filename]
       [--terse=false] [--echo=false] [--interactive=true]

       Gets all the virtual server elements. This command is supported in remote mode only.

OPTIONS

       --user		       authorized domain application server administrative username.

       --password	       password to administer the domain application server.

       --host		       machine name where the domain application server is running.

       --port		       port number of the domain application server listening for administration requests.

       --secure 	       if true, uses SSL/TLS to communicate with the domain application server.

       --passwordfile	       file containing the domain application server password.

       --terse		       indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well-
			       formatted data for consumption by a script. Default is false.

       --echo		       setting to true will echo the command line statement on the standard output. Default is false.

       --interactive	       if set to true (default), only the required password options are prompted.

       Example 1: Using list-virtual-servers

       asadmin> list-virtual-servers --user admin --password adminadmin
       --host localhost --port 4848
       Command list-virtual-servers executed successfully

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-create-virtual-server(1AS), asadmin-delete-virtual-server(1AS)

J2EE 1.4 SDK							    March 2004					 asadmin-list-virtual-servers(1AS)
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