Tag Profiling Flush to Disk Interval

We are looking to analyze how often certain tags are being read. As such, we enabled tag profiling so that all tag queries are logged to /usr/local/bin/ignition/data/diagnostics/tags/default/references.idb. However, if we take a snapshot by looking in this database, run a few things, then run it again, almost nothing has changed.

So we were wondering, how often does the tag counts get flushed to disk? Are we just reading it too frequently? Or would it be some other reason that the tags aren't showing up?