samba - Jul 2021 - Very slow copy for small files from Win 10 to Samba server

Am 30.07.21 um 13:51 schrieb Campbell McLeay via samba:
> Thanks for any pointers,
sounds like the client is doing repeated session setups. Try mounting 
the Samba share with net use to rule this out. If it persists, check 
with Wireshark if you still see the sessions setups. Session setups are 
expensive, so if the client is doing this repeatedly, slow performance 
is to be expected.

-slow

-- 
Ralph Boehme, Samba Team                 https://samba.org/
SerNet Samba Team       https://www.sernet.de/en/team-samba
Samba Development and Support, SerNet Professional Services

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Hi Ralph,

Thanks for the reply.
> sounds like the client is doing repeated session setups. Try mounting
> the Samba share with net use to rule this out. If it persists, check
> with Wireshark if you still see the sessions setups. Session setups are
> expensive, so if the client is doing this repeatedly, slow performance
> is to be expected.
By 'session setups' do you mean tcp sessions, or some other protocol?

'net use' was initially a lot faster (41 seconds on the test case),
but on the second run, it slowed down to 2 minutes for the copy. I'll
do some more testing (and packet captures) as this seems an odd
result.