diff --git a/src/gausskernel/process/postmaster/autovacuum.cpp b/src/gausskernel/process/postmaster/autovacuum.cpp
index e357a44cd7cc18b502b67d10976b1c5dd4e0ead7..ae5e913bd08467ea719083d3b1c491aa9492f642 100755
--- a/src/gausskernel/process/postmaster/autovacuum.cpp
+++ b/src/gausskernel/process/postmaster/autovacuum.cpp
@@ -3719,8 +3719,8 @@ static void partition_needs_vacanalyze(Oid partid, AutoVacOpts* relopts, Form_pg
     partname = NameStr(partForm->relname);
 
     reltuples = partForm->reltuples;
-    anlthresh = (float4)anl_base_thresh + anl_scale_factor * reltuples;
-    vacthresh = (float4)vac_base_thresh + vac_scale_factor * reltuples;
+    anlthresh = (float4) fmin (anl_base_thresh + anl_scale_factor * reltuples , anl_base_thresh + anl_scale_factor * sqrt(reltuples) * 1000.0 );
+    vacthresh = (float4) fmin (vac_base_thresh + vac_scale_factor * reltuples , vac_base_thresh + vac_scale_factor * sqrt(reltuples) * 1000.0 );
 
     if (NULL != t_thrd.autovacuum_cxt.pgStatAutoVacInfo) {
         tablekey.statFlag = relid;