SQS 上可用消息数的限制
Limit on number of available messages on SQS
根据文档 (AWS SQS Limits)，每个队列（在标准队列中）的最大传输消息数为 120,000。
但是 SQS 对队列中的可用消息有任何限制吗？
我猜想在 SQS 中队列可以容纳的消息数量没有限制，但我没有在文档中找到任何关于它的明确声明。
无限制，根据 SQS FAQ:
A single Amazon SQS message queue can contain an unlimited number of
messages. However, there is a 120,000 limit for the number of inflight
messages for a standard queue and 20,000 for a FIFO queue. Messages
are inflight after they have been received from the queue by a
consuming component, but have not yet been deleted from the queue.
根据文档 (AWS SQS Limits)，每个队列（在标准队列中）的最大传输消息数为 120,000。
但是 SQS 对队列中的可用消息有任何限制吗？
我猜想在 SQS 中队列可以容纳的消息数量没有限制，但我没有在文档中找到任何关于它的明确声明。
无限制，根据 SQS FAQ:
A single Amazon SQS message queue can contain an unlimited number of messages. However, there is a 120,000 limit for the number of inflight messages for a standard queue and 20,000 for a FIFO queue. Messages are inflight after they have been received from the queue by a consuming component, but have not yet been deleted from the queue.