if you are not out of available memory, you can consult the manual for a possibl

用了连接池，异常如下：
message from server: "Can 't create a new thread (errno 12); if you are not out of available memory, you can consult the manual for a possible OS-dependent bug "

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是操作系统问题，一般操作系统默认不会让你开太多的线程的。