What is Lucene used for in ThingWorx?

[chrish]

So I'm learning to tune ThingWorx server. I'm noticing the indexing directory in ThingWorxStorage/data is growing quickly with lucene.log files.

1. I know Lucene is a Log Indexing system, but how's it used in ThingWorx?
2. What is the proper way to clean up/maintenance Lucene?
3. Where's the settings for the Lucene service kept in ThingWorx? How (and to what extent) should it be configured?

[PaiChung]

Lucene indeed creates indexes for Thingworx to quickly find information.

I do not know if any management tools are exposed for this, I don't think they are.

[chrish]

So how do prevent Lucene from generating GB of log files and overwhelming the storage on the machine?