fix backfill test timeout

Author: wenym1

ci/scripts/run-backfill-tests.sh

@@ -110,11 +110,13 @@ test_snapshot_and_upstream_read() {
   # Provide snapshot
   run_sql_file "$PARENT_PATH"/sql/backfill/basic/insert.sql
 
+  run_sql "alter table t1 set dml_rate_limit = 10"
+
   # Provide updates ...
   run_sql_file "$PARENT_PATH"/sql/backfill/basic/insert.sql &
 
   # ... and concurrently create mv.
-  run_sql_file "$PARENT_PATH"/sql/backfill/basic/create_mv.sql &
+  run_sql_file "$PARENT_PATH"/sql/backfill/basic/create_mv.sql && run_sql "alter table t1 set dml_rate_limit = default" &
 
   wait
 

ci/scripts/sql/backfill/basic/insert.sql

@@ -2,5 +2,5 @@ insert into t1
 SELECT
     generate_series,
     '{"orders": {"id": 1, "price": "2.30", "customer_id": 2}}'::jsonb
-FROM generate_series(1, 50000);
+FROM generate_series(1, 10000);
 FLUSH;