Various changes

- "Prepare" wasn't listed in SHOW PROCESSLIST
- during ~MySQL_Connection(), all

lib/MySQL_HostGroups_Manager.cpp

@@ -635,8 +635,13 @@ void MySQL_HostGroups_Manager::push_MyConn_to_pool(MySQL_Connection *c, bool _lo
 	}
 	if (mysrvc->status==MYSQL_SERVER_STATUS_ONLINE) {
 		if (c->async_state_machine==ASYNC_IDLE) {
-			c->optimize();
-			mysrvc->ConnectionsFree->add(c);
+			if (c->local_stmts->get_num_entries() > 50) {
+				proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying MySQL_Connection %p, server %s:%d with status %d because has too many prepared statements\n", c, mysrvc->address, mysrvc->port, mysrvc->status);
+				delete c;
+			} else {
+				c->optimize();
+				mysrvc->ConnectionsFree->add(c);
+			}
 		} else {
 			proxy_debug(PROXY_DEBUG_MYSQL_CONNPOOL, 7, "Destroying MySQL_Connection %p, server %s:%d with status %d\n", c, mysrvc->address, mysrvc->port, mysrvc->status);
 			delete c;

lib/MySQL_PreparedStatement.cpp

@@ -132,7 +132,7 @@ void MySQL_STMT_Manager::active_prepared_statements(uint32_t *unique, uint32_t *
 	uint32_t u=0;
 	uint32_t t=0;
 	spin_wrlock(&rwlock);
-	fprintf(stderr,"%u , %u\n", find_prepared_statement_by_hash_calls, add_prepared_statement_calls);
+	fprintf(stderr,"%u , %u , %u\n", find_prepared_statement_by_hash_calls, add_prepared_statement_calls, m.size());
 	for (std::map<uint32_t, MySQL_STMT_Global_info *>::iterator it=m.begin(); it!=m.end(); ++it) {
 		MySQL_STMT_Global_info *a=it->second;
 		if (a->ref_count_client) {

lib/MySQL_Thread.cpp

@@ -2598,6 +2598,9 @@ SQLite3_result * MySQL_Threads_Handler::SQL3_Processlist() {
 					case PROCESSING_STMT_EXECUTE:
 						pta[11]=strdup("Execute");
 						break;
+					case PROCESSING_STMT_PREPARE:
+						pta[11]=strdup("Prepare");
+						break;
 					default:
 						sprintf(buf,"%d", sess->status);
 						pta[11]=strdup(buf);

lib/mysql_connection.cpp

@@ -214,6 +214,7 @@ MySQL_Connection::~MySQL_Connection() {
 		delete local_stmts;
 	}
 	if (query.stmt) {
+		query.stmt->mysql=NULL;
 		mysql_stmt_close(query.stmt);
 		query.stmt=NULL;
 	}