Without a user threshold policy, you do not know if the number of concurrent users is approaching the maximum and how many users have not logged off when they are done with the cloud service.
如果没有用户阈值策略，就无法知道当前的用户数量是否接近最大数量，以及有多少用户在使用完云服务之后没有退出。
The maximum thread pool limit is your theoretical maximum number of concurrent users.
最大的线程池限制是并发用户的最大理论数量。
On a system that has 8 GB of RAM, that puts the theoretical maximum number of concurrent connections at about 4,000 users.
在一个拥有8 GB RAM的系统上，理论上最大的并发连接数量是4,000个用户。
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