--- a/src/backend/commands/vacuum.c
+++ b/src/backend/commands/vacuum.c
@@ -60,2 +60,3 @@
  #include "utils/syscache.h"
+#include "utils/lsyscache.h"

@@ -1255,5 +1256,9 @@ vac_estimate_reltuples(Relation relation,
          */
+char *rel_name = get_rel_name(relation->rd_id);
         if (old_rel_pages == total_pages &&
                 scanned_pages < (double) total_pages * 0.02)
+{
+elog(LOG, "!!!vac_estimate_reltuples| rel_name: %s, old_rel_tuples: %lf", rel_name, old_rel_tuples);
                 return old_rel_tuples;
+}

@@ -1275,2 +1280,3 @@ vac_estimate_reltuples(Relation relation,
         total_tuples = old_density * unscanned_pages + scanned_tuples;
+elog(LOG, "!!!vac_estimate_reltuples| rel_name: %s, floor(total_tuples + 0.5): %lf", rel_name, floor(total_tuples + 0.5));
         return floor(total_tuples + 0.5);