首页 > 代码库 > kernel: nfsd: too many open TCP sockets, consider increasing the number of threads
kernel: nfsd: too many open TCP sockets, consider increasing the number of threads
在/var/log/syslog中看到如下报错:
kernel: nfsd: too many open TCP sockets, consider increasing the number of nfsd threads
网上搜了外国的一篇文章这样说的：
The threads in question are set in /etc/sysconfig/nfs:
USE_KERNEL_NFSD_NUMBER="4"
The default is 4 but can be raised to allow nfsd to handle more requests at once. After making a change, the nfs server daemon can be restarted with:
rcnfsserver restart
Cause
This message is generated by some rule-of-thumb checking, and should not be taken as a indication of a definite problem. Rather, it warns of a situation which might cause low performance under load. The number of TCP connections open to nfsd (nfs server, port 2049) is checked and if the number is considered higher than the server might be able to keep up with, the message is logged.
The message is given when connections to the NFS server‘s port 2049 are greater than [(number of threads + 3) * 20]. For example, at the default of 4, the message will be logged if connections to port 2049 exceed 140. The presence of connections does not necessarily mean all of them are currently making requests. However, it does signify a certain number of NFS clients with file systems mounted, and if many of them were heavily using NFS resources, the NFS Server might not keep up with it‘s work as promptly as desired.
When choosing a new setting, it can sometimes be helpful to manually check the number of nfsd connections, especially over time or at peak work times. To do so, give the following command (at a terminal on the NFS Server).
netstat -nt | grep -c :2049
Then plug the trended count or peak count into the formula above and calculate the number of threads which would be needed to satisfy the algorithm.
本文参考自：http://www.novell.com/support/kb/doc.php?id=7010903
kernel: nfsd: too many open TCP sockets, consider increasing the number of threads
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉： 投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。