Batch processing or batch erasure - which does 'flushed' mean?

[Mizunanari]

Where is the problem?

https://docs.konghq.com/gateway/latest/kong-plugins/queue/#queue-flush-on-shutdown

What happened?

It is not clear whether flushed means sending the queue request to the upstream server or deleting the queue contents.
I need clarification on the meaning of flashed.

What did you expect to happen?

I expect queue requests to be deleted en masse, is that correct?

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[Mizunanari]

For example, in PHP functions, the sending process is denoted as flush.
https://www.php.net/manual/en/function.ob-flush.php

[lena-larionova]

@jschmid1 could you please help clarify the meaning of "flushed" in the context of plugin queues?