2

I have a problem with system memory cache, i think it is bigger than normals. after 5-10 minute of usage, system become unusable and i must restart my "Asus X451-CA" laptop. this command ran upon user logged in, firefox runed:

free -m
             total       used       free     shared    buffers     cached
Mem:          1821       1552        269        377         34        856
-/+ buffers/cache:        661       1159
Swap:         1932          0       1932

and after a while system will freeze:

free -m
             total       used       free     shared    buffers     cached
Mem:          1821       1649        172        581          0        632
-/+ buffers/cache:       1015        805
Swap:         1932         31       1901

more info:

matrix@matrix-X451CA:~$ sysctl vm.swappiness 
vm.swappiness = 60
matrix@matrix-X451CA:~$ sysctl vm.min_free_kbytes 
vm.min_free_kbytes = 65536

i want more swap space being used and reduce cached memory. i tried:

# sysctl -w vm.swappiness=30
# sysctl -w vm.swappiness=90
# sysctl -w vm.min_free_kbytes=65536
# sysctl -w vm.min_free_kbytes=131072

no changes at all.


edit: while system freezes "kswapd0" have most CPU use. I use Ubuntu 14.04 with 3.13.0-32 kernel.

8
  • requested info already in are main post...
    – ma3x
    Aug 4, 2014 at 9:51
  • Ok . Which Ubuntu and which kernel? Aug 4, 2014 at 9:54
  • Do you use preload or swapd? Aug 4, 2014 at 9:56
  • main post edited.
    – ma3x
    Aug 4, 2014 at 10:21
  • 1
    I think main issue is "cache become full without swaping". Ubuntu do not utilize swap normally. I had ArchLinux before this and there was no errors. also i had Ubuntu 14.04 before ArchLinux and there was no errors too. Ubuntu must use more swap but does not. I tried higher "vm.swappiness" values but did not helped... :( What to do now?! I have a fast SSD and i have no problems with high swap usage...
    – ma3x
    Aug 4, 2014 at 13:20

0

You must log in to answer this question.

Browse other questions tagged .