Home / server / Questions / 590482
In Process
LetMeSOThat4U
Asked: 2014-04-23 00:16:44 +0800 CST

Linux (Debian 7 x64) swapping activity despite lots of free memory

  • 772

Yes, I have reduced vm.swappiness a lot:

% sysctl -a | grep swap
vm.swappiness = 1

Memory is mostly free:

% cat /proc/meminfo | head
MemTotal:        8070592 kB
MemFree:         2619580 kB

ps_mem.py (https://raw.github.com/pixelb/ps_mem/master/ps_mem.py) shows just 2.8 GB allocated, yet the system swaps a lot:

% vmstat  2
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  3 3673808 3034600  34924 723456   13   19   297   210   16  132 33  9 56  3
 1  2 3671712 3027772  35984 721372 3248    0  4100   176 2185 3149 19 10 44 28
 1  2 3671048 3008808  35984 721256 9436    0  9436     0 3256 3507 18 10 42 30
 1  2 3670884 2994548  35984 721280 7120    0  7120     0 2734 2926 18 10 48 24

free output:

% free -m
             total       used       free     shared    buffers     cached
Mem:          7881       5881       1999          0        262        965
-/+ buffers/cache:       4653       3228
Swap:         7627       3023       4604
linux

0 Answers