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Top Forums UNIX for Advanced & Expert Users Ubuntu 14.04 - how to less ram usage Post 303028971 by baris35 on Friday 18th of January 2019 04:20:48 PM
Old 01-18-2019
Ubuntu 14.04 - how to less ram usage

Hello,
I have an ubuntu14.04 installed pc with 32GB ram.
Code:
Operating System: Ubuntu 14.04.5 LTS
Kernel: Linux 4.9.148-xxxx-std-ipv6-64
Architecture: x86_64

When I check free memory it shows:

Code:
            total       used       free     shared    buffers    cached
Mem:         31882      31597        285       2136        135      28321
-/+ buffers/cache:       3141      28741
Swap:         4093          0       4093

I suppose there is no adequate free memory to run new applications.
If yes, how may I run more process with less ram usage.
Active processes are php, ffmpeg and mysql.
There are many sleeping process also.



PS: While searching for the answer, I've found this:

Quote:
A healthy Linux system with more than enough memory will, after running for a while, show the following expected and harmless behavior:

free memory is close to 0
used memory is close to total
available memory (or "free + buffers/cache") has enough room (let's say, 20%+ of total)
swap used does not change
Warning signs of a genuine low memory situation that you may want to look into:

available memory (or "free + buffers/cache") is close to zero
swap used increases or fluctuates
dmesg | grep oom-killer shows the OutOfMemory-killer at work
So, in my case, it's okay. No need to worry about that.


Thanks in advance
Boris

Last edited by baris35; 01-18-2019 at 07:06 PM..
 

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BOOTCD(1)							   bootcd utils 							 BOOTCD(1)

NAME
bootcdflopcp - copy changes made after booting from bootcd to floppy SYNOPSIS
bootcdflopcp [-v] [-d <device>] DESCRIPTION
bootcdflopcp will copy changes made in ram to the floppy disk. bootcdflopcp will be available as soon as your system is running from cd. The floppy has to have a filesystem already. (See mke2fs or mformat). If you have to boot from floppy, because your cd-drive or bios does not support to boot from cd a msdos filesystem is used to run syslinux. When bootcdflopcp is called it searches for differences between RAM and CD. For each different file, it checks if it is listed in the files ignore, remove or change on floppy. If it is listed in change it will be saved to change.tgz on floppy. If it is listed in remove the file will be removed from ram next boot time. If it is listed in ignore it will be ignored. If it is not listed at all you will be interactively asked what to do. OPTIONS
-v The option "-v" (verbose) adds messages on running. -d <device> Use another device instead of "/dev/fd0" to save changes. FILES
FLOPPY:/remove If a file is listed here the file will be deleted from ram next boot time. FLOPPY:/change If a file is listed here bootcdflopcp will save it in change.tgz. FLOPPY:/ignore If a file is listed here bootcdflopcp will ignore changes to this file. FLOPPY:/change.tgz Here all changed files are stored in gzipped tar format. SEE ALSO
bootcd(1), bootcd2disk(1), bootcdwrite(1) AUTHOR
This manual page was written by Bernd Schumacher <bernd.schumacher@hp.com>, for the Debian GNU/Linux system (but may be used by others). Wed Feb 23 00:00:00 EET 2000 BOOTCD(1)
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