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突然想到一个问题，消息队列的意义是什么？
source link: https://www.v2ex.com/t/730959
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Java - @Joker123456789 - 消息队列 发明的初衷 是 降低下游的压力，让下游的服务按照自己的能力去消费。但是这引发了另一个问题，如果下游服务的消费能力小于上游服务的生产能力，那么必然会造成消息积压，而且随着时间的累计会越
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