I usually advise not putting more than two or three queue managers on a server, though, because after that the operating system tunables start to be impacted.

我通常建议不要在一个服务器上放置两个或三个以上的队列管理器，因为这样做以后，操作系统的可优化性将开始受到影响。

youdao

If the length of the queue is more than 20 and there are fewer than two extra job servers running, then a server is launched.

如果队列的长度超过20，而且现在运行的服务器少于2个，那么就需要启动一个服务器。

youdao