commit 6cf12211a62de32762e173f74a4e09cfe9b2d842
Author: Amul Sul <sulamul@gmail.com>
Date:   Thu Dec 18 11:09:44 2025 +0530

    WIP2

diff --git a/src/bin/pg_combinebackup/t/002_compare_backups.pl b/src/bin/pg_combinebackup/t/002_compare_backups.pl
index a3e29c05509..d539a0ca511 100644
--- a/src/bin/pg_combinebackup/t/002_compare_backups.pl
+++ b/src/bin/pg_combinebackup/t/002_compare_backups.pl
@@ -45,6 +45,17 @@ CREATE TABLE will_change_in_ts (a int, b text) TABLESPACE ts1;
 INSERT INTO will_change_in_ts VALUES (1, 'initial test row');
 CREATE TABLE will_get_dropped_in_ts (a int, b text);
 INSERT INTO will_get_dropped_in_ts VALUES (1, 'initial test row');
+--
+-- Create a table with minimal fillfactor to minimize tuples per page.
+-- STORAGE PLAIN prevents compression and TOASTing of repetitive data,
+-- ensuring predictable row sizes that target 1 row per page.
+-- At 8KB page size, 135k pages forces the relation to exceed 1GB,
+-- ensuring it spans at least two physical storage segments.
+--
+CREATE TABLE big_tab (a int, b text) WITH (FILLFACTOR = 10);
+INSERT INTO big_tab SELECT i, repeat('x1234567890x0987654321x', 20)
+FROM generate_series(1, 135000) i;
+VACUUM big_tab;
 EOM
 
 # Read list of tablespace OIDs. There should be just one.
@@ -83,6 +94,12 @@ INSERT INTO newly_created_in_ts VALUES (1, 'row for new table');
 VACUUM FULL will_get_rewritten;
 DROP DATABASE db_will_get_dropped;
 CREATE DATABASE db_newly_created;
+--
+-- Delete rows at the logical end of the table. This creates removable empty
+-- pages at the tail
+--
+DELETE FROM big_tab WHERE a > 134900;
+VACUUM (TRUNCATE) big_tab;
 EOM
 
 # Take an incremental backup.