> I found some strange things in my nginx log those days. Some queries'
> $request_time are up to 40 seconds which their $upstream_response_time are
> less than 1 second.

$request_time is time since start of the request (first bytes read from
client) till end of the request (last bytes are sent to client and logging
happens) - so while the backend can generate the response in 1 second there
might be clients with slow connections or even not waiting for the response
(closing it) etc.


rr

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