# python
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
^C-bash: fork: Interrupted system call
# top
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
# cat /var/log/messages
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
# free -m
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable
# ps -efL|wc -l
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: retry: Resource temporarily unavailable
-bash: fork: Resource temporarily unavailable重启机器后，就正常了。但运行一天后，又会出现这个问题。
查看/var/log/messages也没有发现相关的日志。
这个问题的日志是记录在哪里的？如何解决这个问题？
这个就是你的设置需要优化一下：
ulimit -a 看看你的open files, max user processes
再看看你当前系统打开的文件数，进程数。
最简单的方式是提高上述值，红帽5和6设置略有不同。
但是最好是能检查一下系统是否真的需要，是否有问题，一般情况默认值的确有点低。