feat: adjust comment

tsdb/engine/tsm1/engine.go

@@ -2167,10 +2167,8 @@ func (e *Engine) compact(wg *sync.WaitGroup) {
 						level3Groups = level3Groups[1:]
 					}
 				case 4:
-					// From testing, I've found that 100_000 is suitable for when we have a
-					// single generation with multiple files at max block
-					// size under 2 GB. In order to further compact these files the points per block needs
-					// to be increased.
+					// This is a heuristic. 100_000 points per block is suitable for when we have a
+					// single generation with multiple files at max block size under 2 GB.
 					if genLen == 1 {
 						e.logger.Info("TSM optimized compaction on single generation running, increasing total points be block to 100_000.")
 						e.Compactor.Size = tsdb.DefaultMaxPointsPerBlock * 100