现象：

切换到domino notes用户时失败，提示：su: cannot set user id: Resource temporarily unavailable

su - notes 

su: cannot set user id: Resource temporarily unavailable


解决办法：

修改limit.conf中的soft nproc 

提高soft nproc 值

vim /etc/security/limits.conf

*   soft    nproc   4096

source /etc/security/limits.conf

问题解决