We have DELL 2650 server and I found recently /var/log/messages have following messages continue pop-up:
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Dec 3 15:47:06 HOST1 kernel: Free pages: 17816kB (1664kB HighMem)
Dec 3 15:47:06 HOST1 kernel: Active:7463815 inactive:656000 dirty:0 writeback:0 unstable:0 free:4454 slab:119979 mapped:730440 pagetables:63277
Dec 3 15:47:06 HOST1 kernel: DMA free:12448kB min:64kB low:128kB high:192kB active:0kB inactive:0kB present:16384kB pages_scanned:0 all_unreclaimable? yes
Dec 3 15:47:06 HOST1 kernel: protections[]: 0 0 0
Dec 3 15:47:06 HOST1 kernel: Normal free:3704kB min:3728kB low:7456kB high:11184kB active:2688kB inactive:2284kB present:901120kB pages_scanned:6237 all_unreclaimable? yes
Dec 3 15:47:06 HOST1 kernel: protections[]: 0 0 0
Dec 3 15:47:06 HOST1 kernel: HighMem free:1664kB min:512kB low:1024kB high:1536kB active:29852572kB inactive:2621716kB present:33423360kB pages_scanned:0 all_unreclaimable? no
Dec 3 15:47:06 HOST1 kernel: protections[]: 0 0 0
Dec 3 15:47:06 HOST1 kernel: DMA: 2*4kB 5*8kB 3*16kB 2*32kB 4*64kB 2*128kB 2*256kB 0*512kB 1*1024kB 1*2048kB 2*4096kB = 12448kB
Dec 3 15:47:06 HOST1 kernel: Normal: 0*4kB 3*8kB 54*16kB 6*32kB 1*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 1*2048kB 0*4096kB = 3704kBDec 3 15:47:06 HOST1 kernel: HighMem: 4*4kB 54*8kB 0*16kB 18*32kB 4*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 1664kB
Dec 3 15:47:06 HOST1 kernel: 7920770 pagecache pages
Dec 3 15:47:06 HOST1 kernel: Swap cache: add 144565971, delete 144479462, find 64245277/81316857, race 15+5335
Dec 3 15:47:06 HOST1 kernel: 0 bounce buffer pages
Dec 3 15:47:06 HOST1 kernel: Free swap: 39981120kB
Dec 3 15:47:06 HOST1 kernel: 8585216 pages of RAM
Dec 3 15:47:06 HOST1 kernel: 8158130 pages of HIGHMEM
Dec 3 15:47:06 HOST1 kernel: 266508 reserved pages
Dec 3 15:47:06 HOST1 kernel: 11584926 pages shared
Dec 3 15:47:06 HOST1 kernel: 87087 pages swap cached
Dec 3 15:47:06 HOST1 kernel: Out of Memory: Killed process 27850 (oracle).
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This server have 32 GB RAM and 40GB swap space. I don't know why I continue got those messages?
$ free
total used free shared buffers cached
Mem: 33274832 33200168 74664 0 7116 31325660
-/+ buffers/cache: 1867392 31407440
Swap: 40957676 945640 40012036
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