Note: If creating a new agent exceeds this limit, then the connection is queued up and waits for the next available agent to service the request.

注意：如果创建新的代理超出了这一限制，那么连接会排队等待下一个可用的代理来服务请求。

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One problem is that when many threads are launched at once some of them, in practice, will fail to obtain a connection, even if the database limit is not reached.

一个问题就是当很多线程被同时启用时，即使还没有达到该数据库的限值，其中的一些线程实际上也不能获得连接。

youdao

On the other hand, using a pool lets you accurately and locally manage your connection limit.

另一方面，使用池可以让您精确地本地管理连接限值。

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