linux服务器经常出现停顿现象，linux卡住的解决

表现现像：在远程操作ＬＩＮＵＸ服务的时候比如： ssh 经常出现： ls 或者　在输入任何字符的时候突然没有响应，需要多等一段时间linux才能反映过来！

一＼查看日志：

[root@mailtest authlib]# tail -n 10 /var/log/messages |grep er
Jul 23 13:04:26 mailtest kernel: sd 0:0:1:0: ABORT operation started.
Jul 23 13:04:26 mailtest kernel: sd 0:0:1:0: ABORT operation timed-out.
Jul 23 13:04:26 mailtest kernel: sd 0:0:1:0: DEVICE RESET operation started.
Jul 23 13:04:26 mailtest kernel: sd 0:0:1:0: DEVICE RESET operation timed-out.
Jul 23 13:04:26 mailtest kernel: sd 0:0:1:0: BUS RESET operation started.
Jul 23 13:04:26 mailtest kernel: sym0: SCSI BUS reset detected.
Jul 23 13:04:26 mailtest kernel: sym0: SCSI BUS has been reset.
Jul 23 13:04:26 mailtest kernel: sd 0:0:1:0: BUS RESET operation complete.
Jul 23 13:04:26 mailtest kernel: target0:0:1: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 62)
Jul 23 13:04:26 mailtest kernel: target0:0:0: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 62)
[root@mailtest authlib]# uname -a
Linux mailtest.soft123.com 2.6.18-8.el5 #1 SMP Fri Jan 26 14:15:21 EST 2007 i686 i686 i386 GNU/Linux
[root@mailtest authlib]#