diff --git a/libraries/joomla/database/driver/mysql.php b/libraries/joomla/database/driver/mysql.php
index c871efdfcffe4..93b0d2f1cbd94 100644
--- a/libraries/joomla/database/driver/mysql.php
+++ b/libraries/joomla/database/driver/mysql.php
@@ -96,10 +96,15 @@ public function connect()
 		// Set the character set (needed for MySQL 4.1.2+).
 		$this->utf = $this->setUtf();
 
-		// Turn MySQL profiling ON in debug mode:
-		if ($this->debug && $this->hasProfiling())
+		// Disable query cache and turn profiling ON in debug mode.
+		if ($this->debug)
 		{
-			mysql_query('SET profiling = 1;', $this->connection);
+			mysql_query('SET query_cache_type = 0;', $this->connection);
+
+			if ($this->hasProfiling())
+			{
+				mysql_query('SET profiling_history_size = 100, profiling = 1;', $this->connection);
+			}
 		}
 	}
 
diff --git a/libraries/joomla/database/driver/mysqli.php b/libraries/joomla/database/driver/mysqli.php
index e4876984b4b7d..8c84da69ecb9e 100644
--- a/libraries/joomla/database/driver/mysqli.php
+++ b/libraries/joomla/database/driver/mysqli.php
@@ -188,11 +188,15 @@ public function connect()
 		// Set the character set (needed for MySQL 4.1.2+).
 		$this->utf = $this->setUtf();
 
-		// Turn MySQL profiling ON in debug mode:
-		if ($this->debug && $this->hasProfiling())
+		// Disable query cache and turn profiling ON in debug mode.
+		if ($this->debug)
 		{
-			mysqli_query($this->connection, 'SET profiling_history_size = 100;');
-			mysqli_query($this->connection, 'SET profiling = 1;');
+			mysqli_query($this->connection, 'SET query_cache_type = 0;');
+
+			if ($this->hasProfiling())
+			{
+				mysqli_query($this->connection, 'SET profiling_history_size = 100, profiling = 1;');
+			}
 		}
 	}
 
diff --git a/libraries/joomla/database/driver/pdomysql.php b/libraries/joomla/database/driver/pdomysql.php
index 057dadbf55fda..e9858f24aafbf 100644
--- a/libraries/joomla/database/driver/pdomysql.php
+++ b/libraries/joomla/database/driver/pdomysql.php
@@ -153,6 +153,17 @@ public function connect()
 
 		// Set sql_mode to non_strict mode
 		$this->connection->query("SET @@SESSION.sql_mode = '';");
+
+		// Disable query cache and turn profiling ON in debug mode.
+		if ($this->debug)
+		{
+			$this->connection->query('SET query_cache_type = 0;');
+
+			if ($this->hasProfiling())
+			{
+				$this->connection->query('SET profiling_history_size = 100, profiling = 1;');
+			}
+		}
 	}
 
 	/**
@@ -571,4 +582,18 @@ public function transactionStart($asSavepoint = false)
 			}
 		}
 	}
+
+	/**
+	 * Internal function to check if profiling is available.
+	 *
+	 * @return  boolean
+	 *
+	 * @since   __DEPLOY_VERSION__
+	 */
+	private function hasProfiling()
+	{
+		$result = $this->setQuery("SHOW VARIABLES LIKE 'have_profiling'")->loadAssoc();
+
+		return isset($result);
+	}
 }