diff --git a/MainApp/MainApp/AdoClient.cs b/MainApp/MainApp/AdoClient.cs
index 9fa07d4..c05d239 100644
--- a/MainApp/MainApp/AdoClient.cs
+++ b/MainApp/MainApp/AdoClient.cs
@@ -14,11 +14,14 @@ namespace MainApp
 
 		private string connString;
 		private SqlConnection conn;
-		
+
+		private const int MIN_POOL_SIZE = 20;
+		private const int MAX_POOL_SIZE = 100;
+		private const int TIMEOUT = 15; // sec
 
 		public bool SetConnection(string server, string database, string uid, string password)
 		{
-			connString = $"server={server}; database={database}; uid={uid}; pwd={password};";
+			connString = $"server={server}; database={database}; uid={uid}; pwd={password}; min pool size = {MIN_POOL_SIZE}; max pool size = {MAX_POOL_SIZE}; connection timeout = {TIMEOUT};";
 
 			using (conn = new SqlConnection(connString))
 			{