Sponsored Content
Operating Systems Linux Red Hat Concept of free –m command in Linux Post 302758977 by Tommyk on Monday 21st of January 2013 06:21:34 AM
Old 01-21-2013
the line +/- buffers/cache basically shows the memory used and free without taking into account how much is used for buffers or cache.

This is because cached memory is not actually used memory, it is information that is stored for quick retrieval if requested again from previous operations but dumped straight away if memory is required to be written to. This process makes the system run quicker as queries are using data stored on RAM instead of hard disk which is obviously a much quicker process.

So yes, top line free + cached = free on 2nd line
 

9 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. News, Links, Events and Announcements

Red Hat Enterprise Linux - For Free!

CentOS 2 and 3 are a 100% compatible rebuild of the RHEL 2 and 3 versions, in full compliance with RedHat's redistribution requirements. It is for people who need an enterprise class OS without the cost of certification and support. Read more here. I've just installed it on a spare box and it... (0 Replies)
Discussion started by: zazzybob
0 Replies

3. Programming

Determining free(available) memory in MV linux

HI I'm a rookie in C programming and I'm working in Monta Vista Linux. I have to write a program that displays free memory. I have memtester(allready written by someone else) and now I have to type how much amount of memory tester will test and I want that memtester finds out himself how much of... (11 Replies)
Discussion started by: trancedeejay
11 Replies

4. Linux

Free Linux Memory by Dropping Caches

Linux Kernels 2.6.16 and up provide a way to instruct the kernel to drop the page cache, inode and dentry caches on command. This tip can help free Linux memory without a reboot. Note: This is a non-destructive operation. Dirty objects are not freeable, hence; you must run sync beforehand. ... (0 Replies)
Discussion started by: Neo
0 Replies

5. Linux

Concept of link count in linux

Hi All, Please explain me the concept of link counts when you try to view the contents of any file or directory using ls command. -sh-3.00$ ls -lrt total 194 drwxr-xr-x 2 root root 4096 Aug 12 2004 srv drwxr-xr-x 2 root root 4096 Aug 12 2004 mnt drwxr-xr-x 2 root root ... (1 Reply)
Discussion started by: vaibhav.kanchan
1 Replies

6. Linux

Linux Server free memory decreases

Hi, I am facing one problem, On our Linux server Free memory decreases gradually but my java process memory does not increase. Please any one tell, why free memory decreases gradually (1MB in approx 15 minutes). kernel details:- Linux linux4 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT... (13 Replies)
Discussion started by: Vaibhav Agarwal
13 Replies

7. UNIX for Dummies Questions & Answers

Linux free download

Hello, I am not sure where to post this questions... I have Windows XP in my home computer. I need to install Linux on my home computer for learning purpose. Can one please recommend any free download link to download free linux... Any help is appreciated... Thank you... (1 Reply)
Discussion started by: govindts
1 Replies

8. UNIX for Advanced & Expert Users

free memory in debian linux

hi- im running glassfish 3.1 on debian server and there are times where I need to start the domain when we cannot access the web application. I checked the memory and it's confusing me. Am i still ok? can you explain the below? USER PID %CPU %MEM VSZ RSS TTY STAT START TIME... (1 Reply)
Discussion started by: lhareigh890
1 Replies

9. UNIX for Beginners Questions & Answers

Interpreting Linux's free command output

I have two questions on Linux's free command. Below, I have provided output from my home laptop (fedora 26 ) which has 16GB Physical RAM and a production server (RHEL 7.4) which has 24GB RAM. Question1. What exactly does the buffer/cache column say in free command's output ? buffer/cache is... (9 Replies)
Discussion started by: omega3
9 Replies
WINCACHE_FCACHE_MEMINFO(3)						 1						WINCACHE_FCACHE_MEMINFO(3)

wincache_fcache_meminfo - Retrieves information about file cache memory usage

SYNOPSIS
array wincache_fcache_meminfo (void ) DESCRIPTION
Retrieves information about memory usage by file cache. RETURN VALUES
Array of meta data about file cache memory usage or FALSE on failure The array returned by this function contains the following elements: o memory_total - amount of memory in bytes allocated for the file cache o memory_free - amount of free memory in bytes available for the file cache o num_used_blks - number of memory blocks used by the file cache o num_free_blks - number of free memory blocks available for the file cache o memory_overhead - amount of memory in bytes used for the file cache internal structures EXAMPLES
Example #1 A wincache_fcache_meminfo(3) example <pre> <?php print_r(wincache_fcache_meminfo()); ?> </pre> The above example will output: Array ( [memory_total] => 134217728 [memory_free] => 131339120 [num_used_blks] => 361 [num_free_blks] => 3 [memory_overhead] => 5856 ) SEE ALSO
wincache_fcache_fileinfo(3), wincache_ocache_fileinfo(3), wincache_ocache_meminfo(3), wincache_rplist_fileinfo(3), wincache_rplist_mem- info(3), wincache_refresh_if_changed(3), wincache_ucache_meminfo(3), wincache_ucache_info(3), wincache_scache_info(3), wincache_scache_mem- info(3). PHP Documentation Group WINCACHE_FCACHE_MEMINFO(3)
All times are GMT -4. The time now is 09:02 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy