我一直在尝试在
上优化我的Wordpress安装带
但每隔几天，我突然得到一个随机的Out of memory错误，我认为有时它是mysql，它是占据最高内存的最顶级进程并且它会被杀死。
May 20 04:11:14 my-server kernel: [86889.568463] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
May 20 04:11:14 my-server kernel: [86889.568466] 273497 total pagecache pages
May 20 04:11:14 my-server kernel: [86889.568482] 0 pages in swap cache
May 20 04:11:14 my-server kernel: [86889.568485] Swap cache stats: add 0, delete 0, find 0/0
May 20 04:11:14 my-server kernel: [86889.568487] Free swap = 0kB
May 20 04:11:14 my-server kernel: [86889.568489] Total swap = 0kB
May 20 04:11:14 my-server kernel: [86889.568491] 8388507 pages RAM
May 20 04:11:14 my-server kernel: [86889.568493] 0 pages HighMem/MovableOnly
May 20 04:11:14 my-server kernel: [86889.568495] 131593 pages reserved
May 20 04:11:14 my-server kernel: [86889.568497] [ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
May 20 04:11:14 my-server kernel: [86889.568515] [ 417] 0 417 4868 75 13 0 0 upstart-udev-br
May 20 04:11:14 my-server kernel: [86889.568525] [ 422] 0 422 12813 146 27 0 -1000 systemd-udevd
May 20 04:11:14 my-server kernel: [86889.568530] [ 669] 0 669 3814 68 13 0 0 upstart-socket-
May 20 04:11:14 my-server kernel: [86889.568534] [ 935] 102 935 9806 96 24 0 0 dbus-daemon
May 20 04:11:14 my-server kernel: [86889.568538] [ 970] 0 970 10862 92 27 0 0 systemd-logind
May 20 04:11:14 my-server kernel: [86889.568542] [ 981] 101 981 63960 320 28 0 0 rsyslogd
May 20 04:11:14 my-server kernel: [86889.568546] [ 1017] 0 1017 3818 62 13 0 0 upstart-file-br
May 20 04:11:14 my-server kernel: [86889.568549] [ 1046] 0 1046 3954 40 12 0 0 getty
May 20 04:11:14 my-server kernel: [86889.568553] [ 1050] 0 1050 3954 39 13 0 0 getty
May 20 04:11:14 my-server kernel: [86889.568556] [ 1059] 0 1059 3954 41 13 0 0 getty
May 20 04:11:14 my-server kernel: [86889.568560] [ 1060] 0 1060 3954 40 13 0 0 getty
May 20 04:11:14 my-server kernel: [86889.568563] [ 1063] 0 1063 3954 39 13 0 0 getty
May 20 04:11:14 my-server kernel: [86889.568567] [ 1087] 0 1087 4784 41 13 0 0 atd
May 20 04:11:14 my-server kernel: [86889.568571] [ 1088] 0 1088 5913 64 17 0 0 cron
May 20 04:11:14 my-server kernel: [86889.568575] [ 1094] 0 1094 15343 169 34 0 -1000 sshd
May 20 04:11:14 my-server kernel: [86889.568578] [ 1111] 0 1111 4797 67 14 0 0 irqbalance
May 20 04:11:14 my-server kernel: [86889.568582] [ 1112] 0 1112 1091 37 8 0 0 acpid
May 20 04:11:14 my-server kernel: [86889.568585] [ 1332] 0 1332 31675 1117 25 0 0 varnishd
May 20 04:11:14 my-server kernel: [86889.568589] [ 1423] 0 1423 3954 42 13 0 0 getty
May 20 04:11:14 my-server kernel: [86889.568613] [29802] 0 29802 329190 2709 69 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568618] [29957] 0 29957 33327 213 19 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568622] [29958] 107 29958 34193 1055 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568626] [29960] 107 29960 34187 1054 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568629] [29961] 107 29961 34191 1060 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568633] [29962] 107 29962 34183 1055 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568636] [29963] 107 29963 34203 1064 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568639] [29964] 107 29964 34197 1054 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568643] [29965] 107 29965 34186 1057 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568647] [29966] 107 29966 34217 1060 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568650] [29968] 107 29968 34188 1051 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568653] [29969] 107 29969 34192 1044 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568657] [29970] 107 29970 34232 1074 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568660] [29971] 107 29971 34181 1064 22 0 0 nginx
May 20 04:11:14 my-server kernel: [86889.568665] [ 5132] 107 5132 412513 163519 759 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568668] [ 5135] 107 5135 339206 97868 614 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568672] [ 5136] 107 5136 475254 230498 877 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568675] [ 5140] 107 5140 423646 189796 779 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568679] [ 5143] 107 5143 333504 89500 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568683] [ 5144] 107 5144 343835 106152 622 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568687] [ 5149] 107 5149 340029 96973 616 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568690] [ 5150] 107 5150 476366 241523 881 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568694] [ 5151] 107 5151 333534 93593 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568698] [ 5159] 107 5159 332573 19332 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568702] [ 5162] 107 5162 447723 222830 846 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568705] [ 5163] 107 5163 479445 232881 888 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568709] [ 5164] 107 5164 333406 96195 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568713] [ 5166] 107 5166 332701 17906 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568717] [ 5168] 107 5168 408535 169054 749 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568720] [ 5169] 107 5169 381918 155622 729 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568723] [ 5170] 107 5170 470959 252442 900 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568727] [ 5171] 107 5171 333469 93087 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568731] [ 5172] 107 5172 421632 176825 776 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568734] [ 5177] 107 5177 442051 206858 812 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568738] [ 5179] 107 5179 338434 101921 643 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568742] [ 5180] 107 5180 475146 235873 877 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568745] [ 5182] 107 5182 379270 71349 695 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568749] [ 5185] 107 5185 412482 158100 757 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568752] [ 5186] 107 5186 333355 94804 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568756] [ 5187] 107 5187 421562 175509 775 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568759] [ 5188] 107 5188 333532 89194 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568763] [ 5204] 107 5204 333404 90621 604 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568766] [ 5213] 107 5213 478340 236505 885 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568784] [ 5214] 107 5214 481792 242205 889 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568789] [ 5231] 107 5231 452303 214524 835 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568793] [ 5297] 107 5297 333534 89922 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568796] [ 5303] 107 5303 333213 23987 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568800] [ 5334] 107 5334 477066 241858 880 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568804] [ 5335] 107 5335 476600 232751 880 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568807] [ 5359] 107 5359 333508 94162 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568811] [ 5373] 107 5373 333251 90391 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568814] [ 5379] 107 5379 333404 90835 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568818] [ 5382] 107 5382 332766 27662 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568822] [ 5383] 107 5383 338905 97435 613 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568825] [ 5384] 107 5384 404036 173727 766 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568829] [ 5387] 107 5387 424555 180511 780 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568832] [ 5394] 107 5394 407296 148068 747 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568836] [ 5397] 107 5397 332830 44905 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568839] [ 5419] 107 5419 479561 241775 888 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568843] [ 5421] 107 5421 412473 163826 759 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568846] [ 5424] 107 5424 333473 86367 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568850] [ 5428] 107 5428 333231 53061 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568854] [ 5439] 107 5439 340035 93488 615 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568857] [ 5440] 107 5440 365213 124099 677 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568861] [ 5458] 107 5458 382191 153298 728 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568865] [ 5466] 107 5466 332834 30711 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568868] [ 5494] 107 5494 453111 221005 845 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568872] [ 5523] 107 5523 331981 40563 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568875] [ 5524] 107 5524 485030 247253 899 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568879] [ 5534] 107 5534 476151 238372 878 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568882] [ 5543] 107 5543 332766 17694 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568886] [ 5544] 107 5544 384262 78753 703 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568889] [ 5553] 107 5553 475644 231991 880 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568893] [ 5556] 107 5556 476172 231122 878 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568896] [ 5562] 107 5562 333410 90740 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568900] [ 5566] 107 5566 381982 152178 729 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568903] [ 5567] 107 5567 476851 239433 878 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568907] [ 5574] 107 5574 332828 29060 603 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568911] [ 5577] 107 5577 475659 229762 878 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568914] [ 5578] 107 5578 334187 18559 606 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568918] [ 5584] 107 5584 463990 226130 854 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568922] [ 5590] 107 5590 331708 20369 598 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568925] [ 5591] 107 5591 338304 106990 642 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568929] [ 5607] 107 5607 406258 146291 744 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568932] [ 5613] 107 5613 406521 141779 744 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568936] [ 5618] 107 5618 332552 22191 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568953] [ 5635] 107 5635 481591 237766 888 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568959] [ 5643] 107 5643 463363 219062 854 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568962] [ 5644] 107 5644 332894 37358 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568966] [ 5645] 107 5645 481660 234126 890 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568969] [ 5646] 107 5646 332714 30838 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568973] [ 5647] 107 5647 333227 27479 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568977] [ 5650] 107 5650 481910 234587 891 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568980] [ 5651] 107 5651 481208 233957 889 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568984] [ 5652] 107 5652 418425 122280 774 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568987] [ 5654] 107 5654 421513 174061 775 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568991] [ 5655] 107 5655 455417 210453 838 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568994] [ 5661] 107 5661 410233 167423 752 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.568998] [ 5693] 65534 5693 298523 54082 274 0 0 varnishd
May 20 04:11:14 my-server kernel: [86889.569002] [ 5801] 107 5801 332832 17860 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569006] [ 5802] 107 5802 332897 30380 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569009] [ 5803] 107 5803 341042 91666 618 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569013] [ 5804] 107 5804 475516 230789 878 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569016] [ 5806] 107 5806 334094 37059 605 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569020] [ 5807] 107 5807 440896 194812 810 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569023] [ 5808] 107 5808 332770 39507 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569027] [ 5809] 107 5809 332834 26562 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569030] [ 5810] 0 5810 26410 247 57 0 0 sshd
May 20 04:11:14 my-server kernel: [86889.569034] [ 5876] 0 5876 5670 530 16 0 0 bash
May 20 04:11:14 my-server kernel: [86889.569038] [ 5894] 0 5894 6272 168 18 0 0 top
May 20 04:11:14 my-server kernel: [86889.569041] [ 5900] 107 5900 333471 85670 602 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569045] [ 5901] 107 5901 333216 87048 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569048] [ 5902] 107 5902 333127 27248 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569052] [ 5903] 107 5903 402807 149681 760 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569056] [ 5904] 107 5904 475705 232271 880 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569059] [ 5905] 107 5905 332768 41900 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569063] [ 5906] 107 5906 332767 32583 599 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569066] [ 5907] 107 5907 332832 13166 593 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569070] [ 5908] 107 5908 393837 147178 720 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569073] [ 5909] 107 5909 481658 234291 890 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569077] [ 5910] 107 5910 476665 230149 880 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569081] [ 5911] 107 5911 332354 20848 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569084] [ 5912] 107 5912 332765 19477 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569088] [ 5914] 107 5914 398324 154057 761 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569091] [ 5915] 107 5915 463180 219728 854 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569095] [ 5916] 0 5916 1808 24 9 0 0 tail
May 20 04:11:14 my-server kernel: [86889.569098] [ 5917] 0 5917 1808 24 9 0 0 tail
May 20 04:11:14 my-server kernel: [86889.569102] [ 5918] 0 5918 1808 24 9 0 0 tail
May 20 04:11:14 my-server kernel: [86889.569105] [ 5942] 106 5942 2015476 114601 426 0 0 mysqld
May 20 04:11:14 my-server kernel: [86889.569123] [ 6092] 0 6092 6272 163 17 0 0 top
May 20 04:11:14 my-server kernel: [86889.569128] [ 6095] 0 6095 6272 164 17 0 0 top
May 20 04:11:14 my-server kernel: [86889.569132] [ 6096] 0 6096 12489 669 26 0 0 vi
May 20 04:11:14 my-server kernel: [86889.569135] [ 6103] 0 6103 12477 669 27 0 0 vi
May 20 04:11:14 my-server kernel: [86889.569139] [ 6220] 107 6220 333086 18326 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569142] [ 6230] 107 6230 332897 16288 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569146] [ 6237] 107 6237 405812 140589 743 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569149] [ 6238] 107 6238 407975 141948 747 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569153] [ 6240] 107 6240 333022 11540 484 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569157] [ 6246] 107 6246 330748 28319 595 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569160] [ 6251] 107 6251 330931 12602 594 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569164] [ 6252] 107 6252 361777 45794 658 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569167] [ 6261] 107 6261 332767 43184 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569171] [ 6262] 107 6262 332830 15915 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569174] [ 6263] 107 6263 332767 12677 581 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569178] [ 6264] 107 6264 454434 206515 835 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569182] [ 6268] 107 6268 412470 148178 759 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569185] [ 6275] 107 6275 332642 11005 486 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569189] [ 6277] 0 6277 6272 167 17 0 0 top
May 20 04:11:14 my-server kernel: [86889.569193] [ 6288] 107 6288 332958 30114 601 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569196] [ 6289] 107 6289 332766 14279 594 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569200] [ 6325] 107 6325 409376 143052 750 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569203] [ 6326] 107 6326 332573 10287 336 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569206] [ 6327] 107 6327 332830 12098 356 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569210] [ 6330] 0 6330 1808 24 9 0 0 tail
May 20 04:11:14 my-server kernel: [86889.569214] [ 6336] 0 6336 1808 23 9 0 0 tail
May 20 04:11:14 my-server kernel: [86889.569217] [ 6346] 107 6346 333084 10623 345 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569221] [ 6348] 107 6348 333022 10812 356 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569225] [ 6349] 107 6349 332830 16739 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569228] [ 6358] 107 6358 332704 10241 330 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569232] [ 6359] 107 6359 330810 10766 581 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569235] [ 6360] 107 6360 333086 10909 441 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569239] [ 6368] 107 6368 333022 10715 325 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569242] [ 6371] 107 6371 332766 10526 348 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569246] [ 6372] 107 6372 332830 17150 600 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569249] [ 6377] 107 6377 332363 15623 598 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569253] [ 6378] 107 6378 332701 10100 265 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569257] [ 6379] 107 6379 332958 10516 256 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569260] [ 6380] 107 6380 332766 10224 288 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569264] [ 6381] 107 6381 354800 34407 626 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569268] [ 6382] 107 6382 332637 10221 271 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569271] [ 6383] 107 6383 333086 10584 323 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569274] [ 6384] 107 6384 333163 10607 274 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569291] [ 6385] 107 6385 332765 13372 590 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569296] [ 6386] 107 6386 412391 145691 755 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569300] [ 6387] 107 6387 332701 10256 273 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569303] [ 6388] 107 6388 331132 14407 594 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569307] [ 6389] 107 6389 332766 10669 373 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569311] [ 6390] 107 6390 332830 10314 244 0 0 php5-fpm
May 20 04:11:14 my-server kernel: [86889.569314] Out of memory: Kill process 5170 (php5-fpm) score 30 or sacrifice child
May 20 04:11:14 my-server kernel: [86889.569439] Killed process 5170 (php5-fpm) total-vm:1883836kB, anon-rss:625456kB, file-rss:384312kB
May 20 04:11:57 my-server kernel: [86932.538067] init: php5-fpm main process (29802) killed by KILL signal
我的php5-fpm / nginx设置有什么问题吗？请帮忙。