diff --git a/Examples/base_entity/Program.cs b/Examples/base_entity/Program.cs
index 6db4cd6b..bb296c0b 100644
--- a/Examples/base_entity/Program.cs
+++ b/Examples/base_entity/Program.cs
@@ -333,7 +333,7 @@ namespace base_entity
                 //.UseConnectionString(FreeSql.DataType.Firebird, @"database=localhost:D:\fbdata\EXAMPLES.fdb;user=sysdba;password=123456;max pool size=5")
 
 
-                //.UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=2")
+                //.UseConnectionString(FreeSql.DataType.MySql, "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;Initial Catalog=cccddd;Charset=utf8;SslMode=none;min pool size=1;Max pool size=2")
 
                 //.UseConnectionString(FreeSql.DataType.SqlServer, "Data Source=.;Integrated Security=True;Initial Catalog=freesqlTest;Pooling=true;Max Pool Size=3;TrustServerCertificate=true")
 
diff --git a/FreeSql/Internal/CommonUtils.cs b/FreeSql/Internal/CommonUtils.cs
index f502a05f..a79abd7e 100644
--- a/FreeSql/Internal/CommonUtils.cs
+++ b/FreeSql/Internal/CommonUtils.cs
@@ -669,8 +669,9 @@ namespace FreeSql.Internal
 
         public static void PrevReheatConnectionPool(ObjectPool<DbConnection> pool, int minPoolSize)
         {
-            if (minPoolSize <= 0) minPoolSize = Math.Min(5, pool.Policy.PoolSize);
-            if (minPoolSize > pool.Policy.PoolSize) minPoolSize = pool.Policy.PoolSize;
+            var maxPoolSize = pool.Policy.PoolSize - 1;
+            if (minPoolSize <= 0) minPoolSize = Math.Min(5, maxPoolSize);
+            if (minPoolSize > maxPoolSize) minPoolSize = maxPoolSize;
             var initTestOk = true;
             var initStartTime = DateTime.Now;
             var initConns = new ConcurrentBag<Object<DbConnection>>();