upstart 只是一个进程管理器，uWSGI master 可以访问 worker 的大量内存区域(正好相反)所以它可以进行真正的监控工人的行为，除此之外，它还允许优雅的重新加载、导出统计数据和许多其他事情.从各种角度来看，没有它的运行并不是一个好主意.

upstart is only a process manager, the uWSGI master has access to lot of memory areas of workers (well it is the opposite indeed) so it can make truly monitoring of the behaviour of workers, in addition to this it allows graceful reloading, exports statistics and dozens of other things. Running without it is not a good idea from various point of views.