I'm running the union tool on a large stream layer (all of western NC) to merge waterbodys (lakes and ponds) with my stream network (both features are polygons). I tried the merge tool first and it ran for over 24 hours, being stuck at 100% complete for 16 of those hours, so I cancelled it. Now I am trying the union tool since it subdivides features for processing. Its been running for about 24 hours now and it has been saying "processing tiles" in the status and keeps going up to varying percentages (usually less than 50) and then jumping back down to 0 without ever reaching 100% on any one process.
Is this the normal way that Union runs through the tiles, or is something going wrong here that warrants cancelling this operation? I'm wondering because I don't want to waste days of processing on something that isn't going to work.