[Samba] Samba upload from Mac gets very slow until reconnect or restart

[Tadeusz Markowski]

HiUnder normal conditions I'm getting 150+ MB/s when uploading large files to local Samba server.But, every now and then, it slows down to about 4 MB/s. And it stays so, until I either reconnect from the Mac, or restart the Samba server.This happens quite randomly, sometimes couple of times a day, sometimes once every couple of days.When it happens, downloads from Samba remain fast. Also, uploads to the same host with scp remain fast. Only uploads via Samba are affected.It happens no matter if vfs_fruit is used or not.There is no such issue with Windows PCs.I tried a lot of suggestions I've found on the web, both on Samba server and on Mac, without improvement.I did a clean install of the Mac, no change.I'm working with large files (raw photos, video) and this is serious pain for me. I will appreciate any suggestions how to resolve or diagnose this.This is my smb.conf:[global]   map to guest = Never   netbios name = XXX   dos charset = ISO-8859-2   unix charset = UTF-8   unix extensions = no   workgroup = Workgroup   server string = XXX   server role = standalone server   hosts allow = XXX   bind interfaces only = yes   load printers = no   log file = /var/log/samba/log.%I   log level = 9999   max log size = 50000   security = user  unix password sync = Yes  passwd program = /usr/bin/passwd %u  passwd chat = *New*UNIX*password* %n\n *ReType*new*UNIX*password* %n\n *passwd:*all*authentication*tokens*updated*successfully*   socket options = TCP_NODELAY  interfaces = XXX   local master = yes   os level = 65   domain master = yes   preferred master = yes   dns proxy = no   use sendfile = yes  strict sync = no  strict locking = no[homes]   comment = Home Directories   browseable = no   writable = yes   veto files = /Thumbs.db/._*/.DS_Store/Samba version: 4.20.6OS: Fedora release 40 (Forty)RegardsTadeusz Markowski