Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Interpreting Linux's free command output
Top Forums UNIX for Beginners Questions & Answers Interpreting Linux's free command output Post 303010988 by bakunin on Thursday 11th of January 2018 12:04:44 PM
Old 01-11-2018
Quote:
Originally Posted by drysdalk
I would imagine that under normal circumstances the kernel would choose to allocate memory from the free pool first, before flushing out buffers, cache or anything else.
In principle: yes. You can change this behavior to some extent by setting kernel tuning parameters but for most purposes the default behavior does quite OK so that this is not necessary. Here, for instance, is a document describing some of the tuning possibilities:

http://docs.gluster.org/en/latest/Administrator%20Guide/Linux%20Kernel%20Tuning/


for a very short introduction what performance tuning is about you might also read this introduction i once wrote.

Before you try that or anything else in this regard: notice that the result can be really catastrophic! Experiment a lot (on a test system, of course), but treat it like open-heart surgery: this can do a dramatic lot of good if you know what you do but it can prove catastrophic results when you don't. Don't be shy, but be careful.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
drysdalk
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to Use the Free Command in Linux

I know that free command displays memory usages however I like to know how the option and the results when I use this command.. PLease respond ASAP thanx... I am a newbie.. :D (1 Reply)
Discussion started by: LiTo
1 Replies

2. UNIX for Dummies Questions & Answers

Interpreting java output stream as system commands in Solaris

Hi there again, Running Solaris 10 with built-in Java. Seems to compile and run fine. Problem is: Say I want to see contents of current directory. In a shell, I'd just write "ls" and it outputs the content. When I write a Java file, I have the following line: System.out.println("ls"); ... (1 Reply)
Discussion started by: EugeneG
1 Replies

3. Shell Programming and Scripting

Interpreting Logicals/Environment Variables using the read command

Hi All I have something that from the outset seems really trivial but in practice is not quite working. I have the following code sample in my shell script which illustrates the problem echo "enter home directory" read home mkdir $home/newdir The user then enters a logical $HOME... (3 Replies)
Discussion started by: kingpin2502
3 Replies

4. UNIX for Dummies Questions & Answers

interpreting netstat output

hi all, when I run- wcars1j5#netstat -an | grep 8090 127.0.0.1.8090 *.* 0 0 49152 0 LISTEN wcars1j5# 1. does this mean that no one is connected to this port? Regards, akash (1 Reply)
Discussion started by: akash_mahakode
1 Replies

5. UNIX for Dummies Questions & Answers

Interpreting prtdiag output - 2 or 4 CPUs?

I am having trouble figuring this one out.....Is this a 2CPU or a 4CPU v490 with 16GB? I think it is a 2CPU system, looking for confirmation. $ prtdiag System Configuration: Sun Microsystems sun4u Sun Fire V490 System clock frequency: 150 MHz Memory size: 16384 Megabytes ... (1 Reply)
Discussion started by: config_boy
1 Replies

6. UNIX for Advanced & Expert Users

Output of Free command in unix?

Hello, I need some help to interpret the below output... What is -/+ buffers/cache? My understanding is, total RAM is 3986152 Bytes, used RAM is 3950904 bytes. What is buffers and cached?? Can any one please interpret this output? It would be great help if some one can help me on this? ... (2 Replies)
Discussion started by: govindts
2 Replies

7. Red Hat

Understand output of "free" command

Hi Friends, I am really confused with the output of "free" command on redhat linux. I can see caching and buffer output on two different areas on the output. Please let me know whats the difference of these two different outputs. Here I am pasting the command output of my server. # free... (3 Replies)
Discussion started by: arumon
3 Replies

8. Solaris

Interpreting xntpdc output.

Hi. I wonder what the equal sign in front of the answer means. I have read man pages and googled but found no answer. xntpdc -p =15.5.64.3 15.5.2.51 3 512 377 0.02060 0.057426 0.04965Thanks. Jan (1 Reply)
Discussion started by: vettec3
1 Replies

9. Shell Programming and Scripting

Linux command to output from a string

Hi All, I have a file with name Is there a LINUX command that will help me to output the word after the 9th Underscore(_). ie the output should be DLY in this case. Can anybody pls help me. Thanks much in advance, Freddie (4 Replies)
Discussion started by: dsfreddie
4 Replies

10. Red Hat

Concept of free –m command in Linux

I wanted to know the concept of free -m command as there are different rows of Mem, -/+ buffers/cache & Swap in the output. As an example, it is showing 195 as free Mem in my server but 13850 in the free section of the -/+ buffers/cache row. The output needs in depth knowledge of the different... (7 Replies)
Discussion started by: RHCE
7 Replies

LEARN ABOUT MOJAVE

javaws

javaws(1)						      General Commands Manual							 javaws(1)

NAME

       javaws - Java Web Start launcher command

SYNOPSIS

       javaws [ options ] [ URL ]

PARAMETERS

       options	      Command-line options.  Options many be in any order. For a discussion of the various options, see OPTIONS below.

       URL	      Uniform Resource Locator (URL) of the JNLP (Java Network Launching Protocol) file.

DESCRIPTION

       The  javaws command launches Java Web Start, which is the reference implementation of the Java Network Launching Protocol (JNLP).  Java Web
       Start launches java application/applets hosted on a network.

       Without any options javaws will launch the Java JNLP Application Manager, from which users can launch applications/applet or configure Java
       Web Start.

       If a URL for a JNLP file is specified, javaws will launch the Java application/applet specified in the JNLP file.

OPTIONS

       The  javaws  launcher  has  a  set  of  options that are supported in the current release.  However, the options may be removed in a future
       release.  All -X options are non-standard and subject to change.

       -offline
	      Runs Java Web Start in offline mode.

       -uninstall URL
	      Removes a specific application/applet from the user's cache, as indicated by the URL for the JNLP file. Java  Web  Start	will  exit
	      after the command has completed.

       -updateVersions
	      Updates  the Java Web Start configuration file based on the current machine's settings. Java Web Start will exit when the command is
	      completed.

       -Xclearcache
	      Clears the user's cache.	Java Web Start will exit after the command has completed.

       -Xnosplash
	      Disables the display of the initial splash screen.

       -import
	      Imports the application specified by the URL into the user's cache but does not run it..

       -silent
	      When used with the -import option, imports in silent mode; i.e., there will be no UI pop up. The process exit code will be either  0
	      if successful or 1 if not.

       -codebase URL
	      Replaces the codebase with URL in the jnlp file specified when importing the resources. URL must be a valid URL.

       -system
	      Uses the system cache instead of the user cache.

       -shortcut
	      Allows the creation of shortcuts during silent import.

       -association
	      Allows the creation of associations during silent import.

       -open arguments
	      If specified, replaces the arguments in the jnlp file with -open arguments.

       -print arguments
	      If specified, replaces the arguments in the jnlp file with -print arguments.

       -online
	      Runs in online mode (default behavior).

       -viewer
	      Runs the Java Application Cache Viewer (default if no URL is specified).

       -userConfig property-name
	      Clears the specified deployment property.

       -userConfig property-name property-value
	      Sets the specified deployment property to the specified value.

       -wait  If specified, the javaws process will not exit until the application exits.

FILES

       For more information about the user and system cache and deployment.properties files, see http://java.sun.com/j2se/1.5.0/docs/guide/deploy-
       ment/deployment-guide/properties.html

MORE INFORMATION

       For more information about Java Web Start, see http://java.sun.com/j2se/1.5.0/docs/guide/javaws/index.html.

								   09 April 2004							 javaws(1)
All times are GMT -4. The time now is 12:31 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy