Responsible for printing to log (periodically, on re-index) indexing statistics.
What can I do with this log?
Run: `grep indexing-stats atlassian-jira.log`
You should see following log messages:
- [indexing-stats] Top 10 addIndex total... - periodic log message shows top 10 most expensive (in therms of indexing/addIndex) fields since last re-index or system start
- [indexing-stats] Top 10 addIndex snapshot... - periodic log message shows top 10 most expensive (in therms of indexing/addIndex) fields since previous snapshot stats
- [indexing-stats] field indexing cost: {order:.. - after full-reindex log message shows all fields indexing cost (in therms of indexing/addIndex)
In general this log is showing you the cost of loading the data (from DB) to index.
See also
MonitoringIndexWriter
for [lucene-stats] log, which is showing the "lucene" side cost of indexing.