Hi Ben,
If you are checking on periodic training.
Enable debug logging on com.day.cq.dam.similaritysearch and check on the same. It does have info level messages:
log.info("Periodic tagging job started...");
log.info("Periodic tagging job finished and took {} ms", System.currentTimeMillis() - start);
Further you can confirm auto-tagging schedule by navigating to /system/console/components/com.day.cq.dam.similaritysearch.internal.scheduler.PeriodicAutoTaggingJob and checking the
Properties which lists scheduler.expression in cron job format.
However if you have running through on-demand workflow then too it should log messages at debug level as checked from
com.day.cq.dam.similaritysearch.internal.impl.SimilaritySearchServiceImpl.java
log.debug("Request training for tags: [{}]", Arrays.toString(tagIds));
log.debug("Successfully requested training.");
Hence please validate accordingly and confirm by setting debug level logs for com.day.cq.dam.similaritysearch.
Cheers,
Sumeet Chawla.