redhat as上跑vsftpd只一天出现很多defunct进程？

sypdz

我最近提供一些os下载~目的是为了测试一下vsftpd是否如其他人所说的那样好~因为是大文件~而且人多~我想也许可以测试一下vsftpd在redhat as上的效能~结果让我很失望~

虽然说系统负载一直都很小~我想瓶颈应该在带宽上~我曾经这样查看：
netstat -na | grep EST | wc -l
有300多~应该也不大～但是今天早上来一看,竟然很多defunct的vsftpd进程。而且其他用户再也登陆不上ftp服务器，请问各位作何理解？
而各位所用过的又是那种ftp最好用呢？
代码:
nobody & 19885 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19886 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19889 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19891 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19894 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19895 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19898 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19900 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19902 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19903 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19905 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19910 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19914 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19916 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19918 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19920 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19927 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19933 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19935 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19937 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19939 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19941 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19942 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19946 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19948 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19950 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19953 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19955 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19957 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19959 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19960 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19962 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19964 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19965 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19967 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19969 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19971 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19973 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19974 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19976 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>
nobody & 19978 &0.0 &0.0 & & 0 & &0 ? & & & &Z & &01:40 & 0:00 [vsftpd <defunct>


而且这些进程杀都杀不掉，虽然只占少量的资源。
上面的&都是空格~
btw:因为担心syn-flood，所以起了syncookie

sypdz

都在凌晨出现~
http://www.sysinfo.cn/show.php?id=36