You can only check If you double the size and see if it happens again.
Aug 2 21:06:41 suricata: [100247] <Notice> -- rule reload startingAug 2 21:05:50 suricata: [100247] <Notice> -- all 2 packet processing threads, 4 management threads initialized, engine started.Aug 2 21:05:50 suricata: [100243] <Notice> -- This is Suricata version 4.0.5 RELEASE
I talked with the author, there will come many more rules, so I think using this list is only for high end hardware. Probably abuse.ch will stop this ruleset.