In certain situations, the Artifact Utilization test may fail once you upgrade to Security Analytics 8.3.1.
Not enough memory was being allocated to extraction in 8.3.1 build 56455.
This has been resolved with 8.3.1 NSR-1. You can find the NSR patch under "My Downloads" on the support portal under Security Analytics 8.3.1. It is possible that even after applying NSR-1, some tweaks might still be needed depending on your exact traffic patterns. If that is the case, contact technical support for further assistance.
NOTE: You are not missing any artifacts as a consequence of this issue. Artifacts are still being processed.