Why do MaNGOS-based servers(such as Molten) crash occasionally?

[xLethal]

Hello,

I'm curious as to why Molten-WoW and other MaNGOS based servers with 3k+ players online crash at all. I've heard its related to the MaNGOS Grid system, but I haven't found much information on this. I've done some C++ developing of large MMORPG games and don't see why it would be so hard to fix a crash given the amount of experienced developers Molten-WoW has. I'm almost certain that a realm could hold 5k+ players while maintaining consistent stability if it was properly load-balanced(either via failover clustering or balancing zones across multiple physical machines).

Also, I'd like to know why MaNGOS and WoW servers in general use so much RAM compared to Korean MMORPGs. I've seen Korean servers hold over 2,000 players online with less than 4GB ram in use. I understand that Korean MMORPGs are very minimalistic in terms of security(such as position checks), but what is the exact cause of using huge amounts of RAM such as 32GB+ for one realm?

Hope to receive answers to this.

Regards,
Lethal

[stoneharry]

To get the server stable, each time it crashes you have to read the crash dump, trace it through, find exactly what caused it and fix it. If you do this for enough years with the right developers, you will become very stable. This is what Molten-WoW has done.

Furthermore, they have a distributed map system. Each map has it's own instance, so if for example, a dungeon causes a crash - only that instance crashes, and not the entire server. It will then be automatically restarted. Retail do this as well.

As far as RAM usage goes, it's not that high compared to other games. 2GB RAM can host 300 players easily with TrinityCore. It really depends on what your server is doing.

[LilleCarl]

All client information the server uses. thats 1.7 gig atleast if fully loaded. Then we have 100 mb world database atleast, then a all players take a lil

EDIT: Because molten is based off trinitycore. And trinitycore != mangos. That is why, mangos servers are usually very stable.