0。首先用top查看系统状态，发现有两个参数异常。检查%wa参数的含义：wa--iowaitCPU等待I/O完成的时间。1、查看磁盘读写数据，使用iostat查看磁盘状态$iostat-x25avg-cpu:%user%nice%system%iowait%steal%idle3.660.0047.6448.690.000.00Device:rrqm/swrqm/sr/sw/srkB/swkB/savgrq-szavgqu-szawaitr_awaitw_awaitsvctm%utilsda44.5039.27117.2829.3211220.9413126.70332.1765.77462.799.802274.717.60111.41dm-00.000.0083.259.9510515.184295.29317.8457.01648.5416.735935.7911.48107.02dm-10.000.0057.0740.84228.27163.358.0093.84979.6113.942329.0810.93107.022.查看进程状态进程状态表PROCESSSTATECODESDuninterruptiblesleep(usuallyIO)Rrunningorrunnable(onrunqueue)Sinterruptiblesleep(waitingforaneventtocomplete)Tstopped,eitherbyajobcontrolsignalorbecauseitisbeingtraced.Wpaging(notvalidsincethe2.6.xxkernel)Xdead(shouldneverbeenseen)Zdefunct("zombie")进程，已终止但未被其父进程处理。查看进程状态D（磁盘休眠）process#forxin`seq1110`;dops-eostate,pid,cmd|grep"^D";echo"----";sleep5;done查看是否有进程kjournald看看这个过程做了什么？kjournald是ext3文件系统记录文件系统日志的进程查看进程相关状态信息#cat/proc/487/iorchar:48752567wchar:549961789syscr:5967syscw:67138read_bytes:49020928write_bytes:549961728cancelled_write_bytes:0查看写到哪里有问题#lsof-p487kjournald状态D的原因仍在调查中。...原文链接：http://my.oschina.net/u/566401/blog/303364
