在还原数据库时报错，报错信息如下：（库中的表比较多）
ERROR 23 (HY000) at line 29963: Out of resources when opening file
解决方法：
在root下修改ulimit值
[root@yoon export]# 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) 1032169
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) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 1024
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
修改open files和max user processes 值：
[root@yoon export]# ulimit -n 65535
[root@yoon export]# ulimit -u 65535
修改完open files和max user processes 值后，重启mysql数据库，然后再还原数据库即可