Lags and connection errors in multiplayer

[lacko]

Hi!
I was play on internet whith friend and whole day(about 100 years in game) it was good. But then the game was going to slow down and at my side connection errors happens almost every 10 mins(I wasn't be a server).
We played 1024*2048 map and at we have almost 750 trains together. Can anybody help us with that errors and game lags(for example by change some variable in console)?

[maartena]

Your computer is most likely too slow to keep up with the server, and the 750 trains going across it. Once you fall behind too much, you desync out.

What kind of hardware are you playing this map on?

[lacko]

Servers Comp: amd Athlon64 3000+ 1GB RAM
My Comp: amd Semrpon 3100+ 1.5GB RAM

Except that, if I save our multiplayer game and I load it in single player everything is OK.
Maybe is problem with connection, but i don't think so. Servers connection is 100Mbit/100Mbit and my is 5Mbit/512Kbit.

[SyncViews]

there is a command "Net_Frame_Freq".
In the console if a client is slow it says to try increaing the value. The default is "Net_Frame_Freq 0" so you could try setting it to a higher value.

Ive never had the need to play with this though so I'm not sure if it realy makes a diffrence.

[wision]

yeap.. i was the server and i tried different values from 1 to 50 and nothing changed.. only with really high values, the game felt delayed for me.. i really wonder what's causing disconnecting and lags for client because both computers can easily handle 750 trains and we both got connection which can handle ottd (at least i think so..)

[Rubidium]

1) do you use ships AND YAPF for ships?
2) what kind of processor do you have? OpenTTD only uses 1 core, so when you have a quad core and you're playing at 25% CPU you cannot go any faster.
3) MP games need more CPU because we can't do as much pathfinder caching as can be done in SP (otherwise clients would desync on connect)
4) connection needs more CPU because you have to 'play' the frames that have past on the server since it made the savegame and got downloaded to the client within 500 game ticks, otherwise your computer is "too slow" and you'll be disconnected.

[wision]

1) we use only trains
2) server is athlon64 3000+ and client sempron 3100+ (both single core)
during the game, ottd eat 50% of my cpu (a64) which is not that much... dunno about client but i think it's same for him..
just for the record.. week ago we played with 0.5.2rc1 with ~100 road vehicles, ~700 trains, ~30 ships, ~100 aircrafts on 1024x1024 and we didn't have any problem.. 8 clients playing..