Linked Questions

2 votes
2 answers
4k views

What is "effective used" memory on Linux? "used" or ("total"-"available")?

I need to display in GUI for operator used memory vs available on Linux Server So what would be logically correct value to display as usage? [root@host ~]# free total used ...
ALZ's user avatar
  • 931
0 votes
2 answers
2k views

Why /proc/meminfo shows MemAvailable under Kernel Version 3.10?

I've been using CentOS 7 and its kernel version is 3.10. To check Kernel Version, I typed 'uname -r' and command showed 3.10.0-957.1.3.el7.x86_64 As far as I know, MemAvailable metric was introduced ...
mznet07's user avatar
  • 103
5 votes
1 answer
6k views

How are /proc/meminfo values calculated?

/!\ Current state: Update 4 /!\ Some /proc/meminfo values are a sum or a difference of some other values. However, not much is said about how they are calculated in these two links (just do ctrl-f ...
X.LINK's user avatar
  • 1,313
4 votes
1 answer
4k views

free command output: gentoo (redhat?) vs debian

I noticed there is a difference between outputs of free command: On debian: $ free -h total used free shared buffers cached Mem: 4.0G 3.4G ...
Petr's user avatar
  • 1,711
2 votes
1 answer
3k views

Linux Memory: Discrepancy for Buffers+Cache between /proc/meminfo and free?

I have a host and I am not sure about the memory utilization when comparing the output of the free command and the contents of /proc/meminfo. Buffers+Cache don't seem to match between the two sources. ...
Kyle Brandt's user avatar
2 votes
1 answer
2k views

why centos7 free command output available value less than free value

I ask a question, In my centos7, why available value less than free sometimes I think available value is equal to free+buff+cache, available means when start a app how many memory can use? [root@...
穆阿浩's user avatar
  • 401
2 votes
1 answer
5k views

Meaning of "available" field in "free -m" command

I am using Linux CentOS 7.2 version. I have searched details about this but can't found any useful information. What is this about?
Babak Mammadov's user avatar
1 vote
1 answer
650 views

Linux memory calculation and mearsure: what plus what equals to what?

I've read some articles about Linux memory management and understand (perhaps not proficient) the concept of free memory, available memory, swap, etc. But when I check with the following command: cat /...
Vespene Gas's user avatar
1 vote
1 answer
446 views

How shall I understand the output of free?

I have read What do the "buff/cache" and "avail mem" fields in top mean? and https://askubuntu.com/questions/770108/what-do-the-changes-in-free-output-from-14-04-to-16-04-mean. ...
Tim's user avatar
  • 102k
1 vote
1 answer
998 views

Linux Mint RAM Memory - Showing different usage and free space

I have just installed Linux Mint about 5 days ago, and then I have upgraded my RAM memory from 8 GB to 12 GB, and I have 4 GB more on the way, so it will get to 16 GB or RAM. The only thing is, I don'...
unkn0wnx's user avatar
0 votes
1 answer
1k views

MemAvailable higher than expected

$ free -h total used free shared buff/cache available Mem: 7.7Gi 4.5Gi 692Mi 305Mi 2.5Gi 2.6Gi Swap: 2.0Gi ...
sourcejedi's user avatar
  • 50.2k
0 votes
1 answer
449 views

Memory immediately available in Linux memory management system

This is the output of free -h command on my Ubuntu 18.04 laptop: $ free -hg total used free shared buff/cache available Mem: 11G 4,2G 3,4G ...
pkaramol's user avatar
  • 2,799
0 votes
1 answer
546 views

Free Memory Reporting [duplicate]

I have a system where we are constantly storing files into RAM (under /tmp/), processing them and then deleting them. Some files we need to keep in RAM and other not. My problem is that I want to ...
code_fodder's user avatar
2 votes
0 answers
695 views

Why the output of "free" is different from summation of memory usage for each process in "ps"?

I have a Redhat system which has a total of 64GB RAM. As per free output it is utilizing 47GB of RAM. free -g total used free shared buffers cached Mem: ...
Vinod's user avatar
  • 131
2 votes
0 answers
1k views

Portable way to parse /proc/meminfo [duplicate]

I'm having trouble finding a generic code that work, here, for both CentOS 5/6 and CentOS 7 versions pc the /proc/meminfo file. I Want to compute the "Real Used memory" like free does. (amounts ...
mveroone's user avatar
  • 937

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