I read in a couple of post that some people are experiencing some memory leaks problems while they play, I would like to recommend if you can try the latest perfomance binary made by BI in this BI Forum thread.
1.66.139995 new PROFILING branch with PERFORMANCE binaries, v12, server and client, windows/linux
+ some more logging in v11 (1.66.139891)
+ fixed one of possible memory leaks and crashes
I use them while I play and I haven't experienced that problem so far, so I think it worth the try and find out if this solution works for those that had experience that problem.