单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. More than a month ago， the SQL 2005 Server computer is deployed in operation. There are some query performance problems last week. Therefore， you perform an investigation on the locking contention. From the sys.dm_os_wait_stats dynamic management view （DMV）， you can see a high value in the max_wait_time_ms column. You want to check out whether this value is a factor which leads to the current performance problems. In addition， the impact on database users should e cut to the least.  Which action should be performed to achieve the goal？（）

单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005.You work as a database administrator for your company. Your job is to manage a SQL Server 2005 database， and there are several indexes in the SQL Server 2005. A stored procedure should be written， and the procedure should be utilized to check the indexes for fragmentation.  From the following four Transact-SQL statements， which one should be utilized achieve the goal？（）

单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as the administrator of a SQL Server 2005 computer. And recently the server performs gradually slowly. The indexing environment is troubleshooted by you. The clustered indexes are rebuilt by you， and the clustered indexes are utilized the most frequently. The most frequently accessed nonclustered index will be optimized by you. The sys.dm_db_index_usage_stats dynamic management view （DMV） is accessed by you. You can see the results from the table listed below. When the entire index is not read， the nonclustered index which is being utilized the most frequently should be identified.  From the following four object_id and index_id combinations， which one should be utilized to finish the task？（）