32bit Oracle Linux 5.x With 64G RAM Invoked OOM Killer (Doc ID 1083551.1)

Last updated on JUNE 05, 2017

Applies to:

Linux OS - Version Oracle Linux 5.1 and later
Linux x86
Checked at 4th.Aug 2014

Symptoms

32bit Oracle Linux 5.x's PAE kernel Running with 64G physical memory runs out of "LowFree" memory and invokes OOM(Out of Memory) Killer error.

Mar 28 04:20:08 hostname kernel: DMA: 1*4kB 0*8kB 0*16kB 16*32kB 8*64kB 2*128kB 1*256kB 0*512kB 0*1024kB 1*2048kB 0*409 6kB = 3588kB
Mar 28 04:20:08 hostname kernel: DMA32: empty
Mar 28 04:20:08 hostname kernel: Normal: 36*4kB 29*8kB 2*16kB 1*32kB 1*64kB 1*128kB 0*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 3704kB
Mar 28 04:20:08 hostname kernel: HighMem: 93769*4kB 54049*8kB 23422*16kB 10435*32kB 4137*64kB 1703*128kB 725*256kB 281*512kB 81*1024kB 16*2048kB 11918*4096kB = 51260204kB
Mar 28 04:20:08 hostname kernel: 3521623 pagecache pages
Mar 28 04:20:08 hostname kernel: Swap cache: add 0, delete 0, find 0/0, race 0+0
Mar 28 04:20:08 hostname kernel: Free swap = 33554424kB
Mar 28 04:20:08 hostname kernel: Total swap = 33554424kB
Mar 28 04:20:08 hostname kernel: Free swap: 33554424kB
Mar 28 04:20:08 hostname kernel: 16777216 pages of RAM
Mar 28 04:20:08 hostname kernel: 16547840 pages of HIGHMEM Mar 28 04:20:08 hostname kernel: 266040 reserved pages
Mar 28 04:20:08 hostname kernel: 3587385 pages shared Mar 28 04:20:08 hostname kernel: 0 pages swap cached
Mar 28 04:20:08 hostname kernel: 49 pages dirty
Mar 28 04:20:08 hostname kernel: 0 pages writeback
Mar 28 04:20:08 hostname kernel: 16856 pages mapped Mar 28 04:20:08 hostname kernel: 85807 pages slab
Mar 28 04:20:08 hostname kernel: 2916 pages pagetables
Mar 28 04:20:08 hostname kernel: Out of memory: Killed process 4611 (java).
Mar 28 04:20:08 hostname kernel: sshd invoked oom-killer: gfp_mask=0xd0, order=0, oomkilladj=0
Mar 28 04:20:08 hostname kernel: [<c0457a41>] out_of_memory+0x72/0x1a5

Mar 28 04:20:08 hostname kernel: [<c0458f16>] __alloc_pages+0x216/0x297
Mar 28 04:20:08 hostname kernel: [<c046da90>] cache_alloc_refill+0x26d/0x450
Mar 28 04:20:08 hostname kernel: [<c0448063>] audit_syscall_entry+0x14b/0x17d
Mar 28 04:20:08 hostname kernel: [<c046d819>] kmem_cache_alloc+0x41/0x4b
Mar 28 04:20:08 hostname kernel: [<c047e030>] getname+0x1a/0xb0
Mar 28 04:20:08 hostname kernel: [<c04031e1>] sys_execve+0xb/0x4a
Mar 28 04:20:08 hostname kernel: [<c0404f17>] syscall_call+0x7/0xb
Mar 28 04:20:08 hostname kernel: =======================

Changes

Install 32bit OL5 on the system with 64GB RAM.

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms