Difference between revisions of "Out of memory"

From Kolmisoft Wiki
Jump to navigationJump to search
 
Line 11: Line 11:
Linux is built with a  bunch of ‘daemons’. Those daemons are shepherded by several kernel jobs. Apparently all modern Linux kernels have a built-in mechanism called “Out Of Memory killer” which can annihilate your processes under extremely low memory conditions. When such a condition is detected, the killer is activated and picks a process to kill. The target is picked using a set of heuristics scoring all processes and selecting the one with the worst score to kill.
Linux is built with a  bunch of ‘daemons’. Those daemons are shepherded by several kernel jobs. Apparently all modern Linux kernels have a built-in mechanism called “Out Of Memory killer” which can annihilate your processes under extremely low memory conditions. When such a condition is detected, the killer is activated and picks a process to kill. The target is picked using a set of heuristics scoring all processes and selecting the one with the worst score to kill.


Source: https://plumbr.eu/blog/memory-leaks/out-of-memory-kill-process-or-sacrifice-child
* Source: https://plumbr.eu/blog/memory-leaks/out-of-memory-kill-process-or-sacrifice-child
More Info: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-captun.html
* More Info: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-captun.html


Solution: find a process which depletes your RAM and fixed it. Or add more RAM.
Solution: find a process which depletes your RAM and fixed it. Or add more RAM.

Latest revision as of 07:56, 16 May 2016

Check logs like this: cat /var/log/messages | grep memory


Kill process score 10 or sacrifice child

May 14 17:12:31 sip3-mor kernel: [<ffffffff8111d6b0>] ? out_of_memory+0x220/0x3c0
May 14 17:12:32 sip3-mor kernel: Out of memory: Kill process 17589 (pcapsipdump) score 10 or sacrifice child
May 14 17:12:38 sip3-mor kernel: [<ffffffff8111d6b0>] ? out_of_memory+0x220/0x3c0
May 15 07:34:53 sip3-mor kernel: init_memory_mapping: 0000000000000000-00000000c0000000

Linux is built with a bunch of ‘daemons’. Those daemons are shepherded by several kernel jobs. Apparently all modern Linux kernels have a built-in mechanism called “Out Of Memory killer” which can annihilate your processes under extremely low memory conditions. When such a condition is detected, the killer is activated and picks a process to kill. The target is picked using a set of heuristics scoring all processes and selecting the one with the worst score to kill.

Solution: find a process which depletes your RAM and fixed it. Or add more RAM.