Page allocation failure. order:0, mode:0x20
page allocation failure. order:0, mode:0x20
If you constantly get errors like the above and stuff like:
java: page allocation failure. order:0, mode:0x20
instead of java: insert any random application.
Try having a look the
It is the min. value of free memory the kernel will reserve for itself doing sudden [heavy] swapping (more info here: http://www.kernel.org/doc/Documentation/sysctl/vm.txt )
In our system, a 24gb 8-core intel xeon monster with SAN-disks we were getting this multiple times a day usually killing a random java thread. Sometimes another random program would be terminated though.
Eventually we adjusted the value from 20000 -> 64000 and the errors went away.
You can use
to get an idea about actual kernel memory usage/distribution.