dang-stripe commented on code in PR #14469:
URL: https://github.com/apache/pinot/pull/14469#discussion_r1847735055


##########
pinot-plugins/pinot-minion-tasks/pinot-minion-builtin-tasks/src/main/java/org/apache/pinot/plugin/minion/tasks/upsertcompaction/UpsertCompactionTaskGenerator.java:
##########
@@ -218,10 +218,20 @@ public static SegmentSelectionResult 
processValidDocIdsMetadata(Map<String, Stri
         long totalDocs = validDocIdsMetadata.getTotalDocs();
         double invalidRecordPercent = ((double) totalInvalidDocs / totalDocs) 
* 100;
         if (totalInvalidDocs == totalDocs) {
+          LOGGER.info("Segment {} contains only invalid records, adding it to 
the deletion list", segmentName);
           segmentsForDeletion.add(segment.getSegmentName());
         } else if (invalidRecordPercent >= invalidRecordsThresholdPercent
             && totalInvalidDocs >= invalidRecordsThresholdCount) {
+          LOGGER.info("Segment {} contains {} invalid records out of {} total 
records "
+                          + "(count threshold: {}, percent threshold: {}), 
adding it to the compaction list",
+                  segmentName, totalInvalidDocs, totalDocs, 
invalidRecordsThresholdCount,
+                  invalidRecordsThresholdPercent);
           segmentsForCompaction.add(Pair.of(segment, totalInvalidDocs));
+        } else {
+          LOGGER.info("Segment {} contains {} invalid records out of {} total 
records "
+                          + "(count threshold: {}, percent threshold: {}), 
skipping it for compaction",
+                  segmentName, totalInvalidDocs, totalDocs, 
invalidRecordsThresholdCount,
+                  invalidRecordsThresholdPercent);

Review Comment:
   yep, i can switch to debug. i also added a summary log as well (how many 
compacted vs. deleted vs. skipped).



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