Hi I'm also experiencing those crashes.
I had a wasteland server on my dedicated server running with 40 slots and after about 1 hour it just crashes.
At first I thought something is not wrong with my server but also other servers crashed like the 404 Wasteland UK Servers.
Then I thought it could be the Wasteland mission but it also happened with the TDNL DM Mission.
I tested it a bit and with less slots like 30 to 20, the Server lives longer.
The thing is that the client is also crashing as Stapo says and so if someone reports crashes on mp, it is maybe just the server which caused it.
My Server Specs are:
Intel Core E3-1245v2 @3,4 GHz
32 GB DDR3 RAM
100 Mbit
But I run it on debian with virtualbox windows 2003 with limited ram of 4 GB. But the server never took even 1 GB though this should be okay.
PS: Why do we not have the permission to make a thread in the ArmA 3 Alpha Server & Administration Subforum?