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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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set_color(1)							       fish							      set_color(1)

NAME
set_color - set_color - set the terminal color set_color - set the terminal color Synopsis set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR] Description Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple, cyan, white and normal. o -b, --background Set the background color o -c, --print-colors Prints a list of all valid color names o -h, --help Display help message and exit o -o, --bold Set bold or extra bright mode o -u, --underline Set underlined mode o -v, --version Display version and exit Calling set_color normal will set the terminal color to whatever is the default color of the terminal. Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey font color, while set_color --bold white will result in a white font color. Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator. set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of ncurses and recompile fish against it in order to fix this issue. Version 1.23.1 Sun Jan 8 2012 set_color(1)
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