| |||||||||||||
A limit on overcommit?A limit on overcommit?Posted Sep 30, 2004 15:16 UTC (Thu) by aashenfe (guest, #12212)Parent article: Respite from the OOM killer
Is there a limit on the overcommit? For instance the kernel will only commit a percentage of available memory (swap + ram). For instance 150% would allow allowcated memory to grow to 1 and a half time the total available memory?
If their is, is their a tunable parameter?
(Log in to post comments)
A limit on overcommit? Posted Oct 1, 2004 0:44 UTC (Fri) by ilmari (subscriber, #14175) [Link] It is tunable, almost exactly as you suggest. Quoting Documentation/vm/overcommit-accounting:
[S]trict overcommit. The total address space commit
for the system is not permitted to exceed swap + a
configurable percentage (default is 50) of physical RAM.
Depending on the percentage you use, in most situations
this means a process will not be killed while accessing
pages but will receive errors on memory allocation as
appropriate.
The overcommit policy is set via the sysctl `vm.overcommit_memory'.
The overcommit percentage is set via `vm.overcommit_ratio'.
|
|||||||||||||