diff --git a/tests/script/tsim/tagindex/perf.sim b/tests/script/tsim/tagindex/perf.sim
index a8d48f3e98..88d7579ecc 100644
--- a/tests/script/tsim/tagindex/perf.sim
+++ b/tests/script/tsim/tagindex/perf.sim
@@ -8,7 +8,7 @@ print ======== step0
 $dbPrefix = ta_3_db
 $tbPrefix = ta_3_tb
 $mtPrefix = ta_3_mt
-$tbNum =  1000000 
+$tbNum =  100000 
 $rowNum = 20
 $totalNum = 200