[COD2] Ping spikes when rounds start

[kung foo man]

You might be able to gain some speed by removing code/scripts which are executed for every player on every other player, since this kind of code becomes exponentially expensive, like the player collision code.

So you might try libcod and disableGlobalPlayerCollision() e.g. and optimize scripts doing that.

To avoid these O(n^2) algorithms you could implement optimized versions, e.g. to find the nearest players of a player, you can use a kd tree search or just cache some values instead of recalculating it all the time.

https://en.wikipedia.org/wiki/K-d_tr...ighbour_search

I had the same problem of lag spikes, when I hosted NS zombies on a VPS, but I just decided to rent better suited hardware.

What you can try quickly is to change the process priority (aka nice value) of this cod2 server, so it can suck up more time slices of 1 cpu: https://en.wikipedia.org/wiki/Nice_(Unix)

In addition to that, pin the process on a specifc CPU and exclude all other processes from that core (with isolcpus), so 1 cpu is dedicated to this cod2 server only: http://xmodulo.com/run-program-proce...res-linux.html