linux查看每个用户最大允许打开文件数量
解决方法：
执行：ulimit -a
例如：
其中open files後面的值1024就是限制打开的文件数
[root@xxx java]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 63015
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 63015
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited