Linux交换使用比总数高

我发现一个bizare在我的服务器上想。 所使用的掉期明显高于总掉期。

free -m total used free shared buffers cached Mem: 1869 1788 80 71 35 487 -/+ buffers/cache: 1265 603 Swap: 2046 1759218603 9146 

swapon -s显示交换大小为2.0 GB：

  swapon -s Filename Type Size Used Priority /dev/sdb1 partition 2096124 46584 -1 

有关信息，最受欢迎的交换消费者如下：

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 for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | sort -k 2 -n -r |head -n 10 scanner 11988 kB scanner 11944 kB scanner 11936 kB scanner 11932 kB php-fpm 4428 kB log 2920 kB snmpd 2700 kB cma 1996 kB cma 1996 kB cma 1996 kB 

meminfo中：

 cat /proc/meminfo MemTotal: 1914596 kB MemFree: 672796 kB Buffers: 19100 kB Cached: 387924 kB SwapCached: 5348 kB Active: 470276 kB Inactive: 446516 kB Active(anon): 310168 kB Inactive(anon): 278548 kB Active(file): 160108 kB Inactive(file): 167968 kB Unevictable: 3896 kB Mlocked: 3896 kB SwapTotal: 2096124 kB SwapFree: 9384400 kB Dirty: 48 kB Writeback: 0 kB AnonPages: 510888 kB Mapped: 44264 kB Shmem: 76232 kB Slab: 261036 kB SReclaimable: 217824 kB SUnreclaim: 43212 kB KernelStack: 4272 kB PageTables: 14600 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 3053420 kB Committed_AS: 1391372 kB VmallocTotal: 34359738367 kB VmallocUsed: 281060 kB VmallocChunk: 34359452940 kB HardwareCorrupted: 0 kB AnonHugePages: 172032 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 8192 kB DirectMap2M: 2088960 kB 

[编辑]这里问的是没有-m参数和uname -a

 free total used free shared buffers cached Mem: 1914596 1741152 173444 75800 8740 377320 -/+ buffers/cache: 1355092 559504 Swap: 2096124 1801439850 10696044 uname -a Linux myserver 2.6.32-573.3.1.el6.x86_64 #1 SMP Thu Aug 13 22:55:16 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux 

对于信息我也发现这在我的dmesg：

 Out of memory: Kill process 28579 (php-fpm) score 137 or sacrifice child Killed process 28579, UID 516, (php-fpm) total-vm:1439832kB, anon-rss:68204kB, file-rss:4072kB hpet1: lost 1 rtc interrupts vmtoolsd invoked oom-killer: gfp_mask=0x200da, order=0, oom_adj=0, oom_score_adj=0 vmtoolsd cpuset=/ mems_allowed=0 Pid: 2024, comm: vmtoolsd Tainted: GW -- ------------ 2.6.32-573.3.1.el6.x86_64 #1 Call Trace: [<ffffffff810d6dd1>] ? cpuset_print_task_mems_allowed+0x91/0xb0 [<ffffffff8112a5d0>] ? dump_header+0x90/0x1b0 [<ffffffff81232cbc>] ? security_real_capable_noaudit+0x3c/0x70 [<ffffffff8112aa52>] ? oom_kill_process+0x82/0x2a0 [<ffffffff8112a991>] ? select_bad_process+0xe1/0x120 [<ffffffff8112ae90>] ? out_of_memory+0x220/0x3c0 [<ffffffff8113786c>] ? __alloc_pages_nodemask+0x93c/0x950 [<ffffffff810f5709>] ? delayacct_end+0x89/0xa0 [<ffffffff811275f0>] ? sync_page_killable+0x0/0x40 [<ffffffff8117035a>] ? alloc_pages_vma+0x9a/0x150 [<ffffffff81163882>] ? read_swap_cache_async+0xf2/0x160 [<ffffffff811643d9>] ? valid_swaphandles+0x69/0x160 [<ffffffff81163977>] ? swapin_readahead+0x87/0xc0 [<ffffffff81152abd>] ? handle_pte_fault+0x6dd/0xb20 [<ffffffff811b45c0>] ? mntput_no_expire+0x30/0x110 [<ffffffff81153199>] ? handle_mm_fault+0x299/0x3d0 [<ffffffff8119fd7b>] ? putname+0x2b/0x40 [<ffffffff81155bb6>] ? find_vma+0x46/0x80 [<ffffffff8104f156>] ? __do_page_fault+0x146/0x500 [<ffffffff81290271>] ? cpumask_any_but+0x31/0x50 [<ffffffff81197750>] ? vfs_fstatat+0x50/0xa0 [<ffffffff81014a19>] ? read_tsc+0x9/0x10 [<ffffffff8106343d>] ? thread_group_times+0x3d/0x120 [<ffffffff811978cb>] ? vfs_stat+0x1b/0x20 [<ffffffff8153e95e>] ? do_page_fault+0x3e/0xa0 [<ffffffff8153bd05>] ? page_fault+0x25/0x30 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: 110 CPU 1: hi: 186, btch: 31 usd: 62 CPU 2: hi: 186, btch: 31 usd: 48 CPU 3: hi: 186, btch: 31 usd: 78 active_anon:322906 inactive_anon:108241 isolated_anon:480 active_file:1427 inactive_file:1298 isolated_file:0 unevictable:994 dirty:0 writeback:1 unstable:0 free:13249 slab_reclaimable:2892 slab_unreclaimable:9700 mapped:3333 shmem:10113 pagetables:6259 bounce:0 Node 0 DMA free:8352kB min:332kB low:412kB high:496kB active_anon:3544kB inactive_anon:3652kB active_file:0kB inactive_file:8kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15300kB mlocked:0kB dirty:0kB writeback:0kB mapped:8kB shmem:56kB slab_reclaimable:16kB slab_unreclaimable:36kB kernel_stack:0kB pagetables:52kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:11333 all_unreclaimable? yes lowmem_reserve[]: 0 2004 2004 2004 Node 0 DMA32 free:44644kB min:44720kB low:55900kB high:67080kB active_anon:1288080kB inactive_anon:429184kB active_file:5708kB inactive_file:5184kB unevictable:3976kB isolated(anon):2048kB isolated(file):0kB present:2052192kB mlocked:3976kB dirty:0kB writeback:4kB mapped:13324kB shmem:40396kB slab_reclaimable:11552kB slab_unreclaimable:38764kB kernel_stack:4480kB pagetables:24984kB unstable:0kB bounce:0kB writeback_tmp:0kB pages_scanned:2629632 all_unreclaimable? yes lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 12*4kB 14*8kB 6*16kB 1*32kB 2*64kB 2*128kB 2*256kB 2*512kB 2*1024kB 2*2048kB 0*4096kB = 8352kB Node 0 DMA32: 435*4kB 377*8kB 269*16kB 344*32kB 142*64kB 39*128kB 23*256kB 3*512kB 1*1024kB 1*2048kB 0*4096kB = 44644kB 13751 total pagecache pages 196 pages in swap cache Swap cache stats: add 35252293, delete 35252097, find 25799626/28229091 Free swap = 8734852kB Total swap = 2096124kB 524272 pages RAM 45687 pages reserved 34271 pages shared 456140 pages non-shared 

这是谁的？ 服务器上有什么exception吗？