Another minor oversight in commit
4f8d9d12.
}
/*
- * Remove the collected garbage tuples from the table and its indexes.
+ * Main entry point for index vacuuming and heap vacuuming.
+ *
+ * Removes items collected in dead_items from table's indexes, then marks the
+ * same items LP_UNUSED in the heap. See the comments above lazy_scan_heap
+ * for full details.
+ *
+ * Also empties dead_items, freeing up space for later TIDs.
*
* We may choose to bypass index vacuuming at this point, though only when the
* ongoing VACUUM operation will definitely only have one index scan/round of