Display of reverse links does affect platform operation
mysql> SELECT DISTINCT(tracker_changeset.artifact_id), tracker_artifact.last_changeset_id, tracker.group_id, tracker.item_name AS keyword, tracker.id AS tracker_id FROM tracker_changeset_value_artifactlink AS artlink JOIN tracker_changeset_value as value ON (artlink.changeset_value_id = value.id) JOIN tracker_changeset ON (tracker_changeset.id = value.changeset_id) JOIN tracker_artifact ON (tracker_artifact.id = tracker_changeset.artifact_id) JOIN tracker ON (tracker.id = tracker_artifact.tracker_id) WHERE artlink.artifact_id = 138051 AND tracker_artifact.last_changeset_id = tracker_changeset.id;
+-------------+-------------------+----------+---------+------------+
| artifact_id | last_changeset_id | group_id | keyword | tracker_id |
+-------------+-------------------+----------+---------+------------+
| 134650 | 328401 | 506 | story | 3498 |
+-------------+-------------------+----------+---------+------------+
1 row in set (20.89 sec)