[cups.general] cups reload - what is it doing with queue?

[Jiri B.]

Hello,

we use a script to update printers.conf for CUPS. To tell CUPS to
re-read config file I tell CUPS to reload (`service cups reload' which
is sending HUP signal to his daemon).

My question which also is important for customer:
- what happens behind reload? It is cleaning printing queues? Would
  that impact currently running printing?

I could not find exact answer in documentation.

Thank you in advance for your explanation.

Jiri