[Enhancement] Improve pop consumption throughput when the retry topic is backlogged

[redlsz]

Before Creating the Enhancement Request

• I have confirmed that this should be classified as an enhancement rather than a bug/feature.

Summary

In pop consumption mode, when retry messages accumulate in retry topics, the consumption throughput becomes low if clients use a specified queue (not -1).

For specified queue case, we should also re-fetch from the retry topic if the message batch is not fully filled.

Motivation

Improve pop consumption throughput when the retry topic is backlogged

Describe the Solution You'd Like

For specified queue case, we should also re-fetch from the retry topic if the message batch is not fully filled.

Describe Alternatives You've Considered

/

Additional Context

No response

[lizhimins]

If the client uses the Pop Queue method, the overall number of requests will be very large. In such a scenario, using a 20% probability for retries should generally meet the requirements, although each call to GetMessageFromRetry may introduce some additional overhead.

如果客户端使用 Pop Queue 的方式，那么整体请求数量将会非常大。在这样的情况下，采用 20% 的概率进行重试基本上可以满足需求，每次调用 GetMessageFromRetry 可能会带来一些额外开销。