我有一个运行Percona Xtradb服务器的数据库服务器，还有5个从属服务器。我总是得到错误
mysql错误：无法创建新线程（errno 11）；如果您没有足够的可用内存，则可以查阅手册以获取可能的操作系统相关错误
虽然我设置了无限
root@master:~# 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) 2062915
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1000000
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) 1000000 …