这台机器有很多交换机,但仍然偶尔会被oom-killer杀死.任何人都可以解释这种行为,更重要的是如何防止它发生？
Dmesg输出：
python invoked oom-killer: gfp_mask=0x1200d2,order=0,oomkilladj=4 Pid: 13996,comm: python Not tainted 2.6.27-gentoo-r8cluster-e1000 #9 Call Trace: [<ffffffff8025ab6b>] oom_kill_process+0x57/0x1dc [<ffffffff802460c7>] getnstimeofday+0x53/0xb3 [<ffffffff8025ae78>] badness+0x16a/0x1a9 [<ffffffff8025b0a9>] out_of_memory+0x1f2/0x25c [<ffffffff8025e181>] __alloc_pages_internal+0x30f/0x3b2 [<ffffffff8026fea0>] read_swap_cache_async+0x48/0xc0 [<ffffffff8026ff6f>] swapin_readahead+0x57/0x98 [<ffffffff80266d0e>] handle_mm_fault+0x408/0x706 [<ffffffff8057da33>] do_page_fault+0x42c/0x7e7 [<ffffffff8057baf9>] error_exit+0x0/0x51 Mem-Info: Node 0 DMA per-cpu: cpu 0: hi: 0,btch: 1 usd: 0 cpu 1: hi: 0,btch: 1 usd: 0 cpu 2: hi: 0,btch: 1 usd: 0 cpu 3: hi: 0,btch: 1 usd: 0 Node 0 DMA32 per-cpu: cpu 0: hi: 186,btch: 31 usd: 103 cpu 1: hi: 186,btch: 31 usd: 48 cpu 2: hi: 186,btch: 31 usd: 136 cpu 3: hi: 186,btch: 31 usd: 183 Active:480346 inactive:483 dirty:0 writeback:10 unstable:0 free:3408 slab:5146 mapped:1408 pagetables:2687 bounce:0 Node 0 DMA free:8024kB min:20kB low:24kB high:28kB active:1156kB inactive:0kB present:8364kB pages_scanned:3246 all_unreclaimable? yes lowmem_reserve[]: 0 2003 2003 2003 Node 0 DMA32 free:5608kB min:5716kB low:7144kB high:8572kB active:1920228kB inactive:1932kB present:2051308kB pages_scanned:2941301 all_unreclaimable? yes lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 8*4kB 3*8kB 4*16kB 3*32kB 4*64kB 3*128kB 2*256kB 3*512kB 3*1024kB 1*2048kB 0*4096kB = 8024kB Node 0 DMA32: 42*4kB 6*8kB 1*16kB 0*32kB 2*64kB 1*128kB 0*256kB 0*512kB 1*1024kB 0*2048kB 1*4096kB = 5608kB 325424 total pagecache pages 323900 pages in swap cache Swap cache stats: add 20776604,delete 20452704,find 7856195/10744535 Free swap = 151691424kB Total swap = 156290896kB 524032 pages RAM 9003 pages reserved 331431 pages shared 186210 pages non-shared Out of memory: kill process 12965 (bash) score 2236480 or a child Killed process 13996 (python)
与虚拟机相关的系统：
vm.overcommit_memory = 0 vm.panic_on_oom = 0 vm.oom_kill_allocating_task = 0 vm.oom_dump_tasks = 0 vm.overcommit_ratio = 50 vm.page-cluster = 3 vm.dirty_background_ratio = 5 vm.dirty_ratio = 10 vm.dirty_writeback_centisecs = 500 vm.dirty_expire_centisecs = 3000 vm.nr_pdflush_threads = 2 vm.swappiness = 60 vm.nr_hugepages = 0 vm.hugetlb_shm_group = 0 vm.hugepages_treat_as_movable = 0 vm.nr_overcommit_hugepages = 0 vm.lowmem_reserve_ratio = 256 256 32 vm.drop_caches = 0 vm.min_free_kbytes = 5740 vm.percpu_pagelist_fraction = 0 vm.max_map_count = 65536 vm.laptop_mode = 0 vm.block_dump = 0 vm.vfs_cache_pressure = 100 vm.legacy_va_layout = 0 vm.zone_reclaim_mode = 0 vm.min_unmapped_ratio = 1 vm.min_slab_ratio = 5 vm.stat_interval = 1 vm.numa_zonelist_order = default
