AgentEvent, AgentLifeCycle data are not splitted correctly.

[Xylus]

Both AgentEvent, and AgentLifeCycle tables are pre-splitted. But upon insertion, they are not salted. This results in data hotspotting into the last region.

Adding salts when generating row keys for insertion should fix this problem, but will do nothing for data that are already inserted. Adding code for backwards compatibility would work but unbalance in region size would still be there.

Since the i/o and the data sizes aren't big, it might be better to remove pre-splitting and just merging the regions into one (and let it auto-split).