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电梯直达

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发表于 2008-03-05 10:53 |只看该作者 |倒序浏览

系统阵发性出现io 高等待，vmstat 信息如下：\r\nr b avm fre re pi po fr sr cy in sy cs us sy id wa\r\n 3 52 10115073 9861 0 7 615 902 2200 0 2584 79655 12267 11 6 23 59\r\n 3 60 10115379 10087 0 118 499 1030 2743 0 2547 90827 14377 22 3 20 55\r\n 3 40 10115778 11068 0 49 1025 1272 4155 0 2201 64754 9999 13 4 21 62\r\n 2 35 10116424 10119 0 217 144 772 1767 0 3969 191155 20607 23 11 23 43\r\n 4 19 10115103 10347 0 218 346 0 0 0 3243 194543 25016 34 10 17 39\r\n 3 18 10115148 10099 0 26 862 1675 4174 0 1911 68994 9021 12 5 20 63\r\n 3 15 10115331 10122 0 149 375 773 3647 0 3377 101819 15510 26 5 31 38\r\n 3 22 10115479 9999 0 131 652 898 2670 0 3460 157188 13439 22 11 29 39\r\n 6 22 10115707 8152 0 91 752 4640 19694 0 3061 126457 10705 14 5 35 45\r\n 5 52 10114694 6347 0 0 1458 6297 21187 0 1973 47604 9146 6 5 40 49\r\n 2 75 10114730 6129 0 0 1314 4101 27456 0 1721 18481 15519 4 5 40 52\r\n 0 0 10114818 6275 0 0 1515 4484 24450 0 1920 51165 19703 9 11 26 54\r\n 0 85 10114813 6968 0 0 1637 1926 17959 0 1047 7912 5162 3 3 24 70\r\n 1 109 10114840 7988 0 0 1058 129 1207 0 806 8773 4943 7 1 21 71\r\n 0 144 10115554 8140 0 38 783 1766 13939 0 1218 18073 6029 14 5 14 67\r\n 2 157 10115554 8745 0 62 846 384 2885 0 777 30236 24464 8 6 20 67\r\n 1 162 10115644 9336 0 70 678 129 363 0 479 17188 22465 1 2 23 75\r\n 0 157 10115645 9726 0 2 338 0 0 0 226 14228 22486 0 1 23 76\r\n 1 152 10115670 9929 0 103 351 518 2634 0 524 32638 22157 3 6 23 68\r\n 2 135 10116418 10364 0 208 551 1936 8930 0 1266 52833 8186 19 4 31 46\r\n iostat信息显示rootvg的本地磁盘繁忙程度较高：\r\ntty: tin tout avg-cpu: % user % sys % idle % iowait\r\n 0.0 2135.0 30.7 14.0 23.2 32.1\r\n\r\nDisks: % tm_act Kbps tps Kb_read Kb_wrtn\r\nhdisk1 75.0 8010.0 265.0 7368 642\r\nhdisk0 79.0 7410.0 299.0 6768 642\r\nhdisk2 0.0 0.0 0.0 0 0\r\nhdisk3 0.0 0.0 0.0 0 0\r\nhdisk5 0.0 0.0 0.0 0 0\r\nhdisk4 0.0 0.0 0.0 0 0\r\nhdisk6 100.0 32636.0 443.0 32456 180\r\nhdisk9 0.0 0.0 0.0 0 0\r\nhdisk8 0.0 0.0 0.0 0 0\r\nhdisk7 13.0 100.0 25.0 100 0\r\ncd0 0.0 0.0 0.0 0 0\r\n\r\ntty: tin tout avg-cpu: % user % sys % idle % iowait\r\n 0.0 903.0 32.4 14.9 26.0 26.6\r\n\r\nDisks: % tm_act Kbps tps Kb_read Kb_wrtn\r\nhdisk1 75.0 7251.0 174.0 6352 899\r\nhdisk0 82.0 8479.0 194.0 7708 771\r\nhdisk2 0.0 0.0 0.0 0 0\r\nhdisk3 0.0 0.0 0.0 0 0\r\nhdisk5 0.0 0.0 0.0 0 0\r\nhdisk4 0.0 0.0 0.0 0 0\r\nhdisk6 100.0 60120.0 600.0 60000 120\r\nhdisk9 0.0 0.0 0.0 0 0\r\nhdisk8 0.0 0.0 0.0 0 0\r\nhdisk7 17.0 144.0 36.0 144 0\r\ncd0 0.0 0.0 0.0 0 0\r\n\r\nfilemon命令显示换页空间数据写的时间很长\r\nVOLUME: /dev/paging00 description: paging\r\nreads: 5277 (0 errs)\r\n read sizes (blks): avg 8.0 min 8 max 8 sdev 0.0\r\n read times (msec): avg 364.863 min 3.022 max 11502.432 sdev 1135.109\r\n read sequences: 5232\r\n read seq. lengths: avg 8.1 min 8 max 32 sdev 0.9\r\nwrites: 19388 (0 errs)\r\n write sizes (blks): avg 8.0 min 8 max 16 sdev 0.3\r\n write times (msec): avg 677.030 min 7.534 max 11309.535 sdev 924.763\r\n write sequences: 12774\r\n write seq. lengths: avg 12.2 min 8 max 376 sdev 14.2\r\nseeks: 18006 (73.0%)\r\n seek dist (blks): init 14142984,\r\n avg 2949139.1 min 8 max 32953616 sdev 5382365.5\r\ntime to next req(msec): avg 2.444 min 0.000 max 443.466 sdev 9.211\r\nthroughput: 1638.6 KB c\r\nutilization: 0.99\r\n上面vmstat命令也显示有较高换页发生。请教该怎么进一步确定引起问题的原因？或者可以尝试做什么调整？谢谢