[Bacardi]

You have not mention,
your player count
your server upload speed


But just for info.

When player rate is set too low, player will get CHOKE.
CHOKE means, server is not able to send "big" single-full-package(s) to the player.
Server is going to split package(s) to next updates. Chopping to smaller pieces.

How decrease CHOKE ?
+ set player rate bigger
+ lower player updaterate

What make update packages bigger ?
- Server update rate, how big is server tickrate.
More updates per second, bigger data is send to players.
- Player count, more players on server, more data is shared.
- Maps. How well maps are build, have those maps optimized.
When lot of players are in same "room", can see each other, more data is shared.
Do map run weird logic's or physics ? There are some map entities which increase network traffic.

TF2 and CS:GO games today is filled all kind skins, models, etc. etc this also increase network traffic for comparing older games.


You can calculate rate value, but you need look when server rates set high, full of players and everyone shooting and jumping in same place.
Also enable net_graph 5 diagram to look network data.

But you could try first base value 1000 - 1500 bytes. 128 tick
1000 bytes x 128 updates = rate 128000
1500 bytes x 128 updates = rate 192000

for 64 tick
1000 bytes x 64updates = rate 64000
1500 bytes x 64 updates = rate 96000

Then increase rate value or decrease update rate.
It depends player internet bandwidth and server's

Also, if player FPS go lower than update rate, update rate will decrease as well.