1:sys.dm_db_index_usage_stats返回索引的被使用的信息,但是这个DMV视图中的数据是自数据库服务启动以来累计收集的数据(只要重启SQL Server服务,该视图的计数器就初始化为空。而且,当分离或关闭数据库时(例如,由于 AUTO_CLOSE 设置为 ON),便会删除与该数据库关联的所有记录。),所以,如果数据库只运行
number of operations done not the actual rows affected. For example, if you delete 1000 rows in one statement, this count increments by 1 我们可以使用下面SQL语句查找当前数据库中的未使用索引(unused index): SELECT 'SQL Server Instance Start with ' + CONVERT(VARCHAR(16),create_date,120) FROM ...
Monitoring your SQL Server index usage and taking the time to find unused indexes in SQL Server can enable you to take charge of your SQL Server performance, organization, and resource allocation, which ultimately helps the business run more effectively. When you analyze SQL Server index usage st...
Ive blogged about this previously in the general context of Index Management but ive created a more specific query for unused indexes which lets me quickly identify which indexes are not being used or have never been used in a database. This query goes a step further to find how much space...
Of course you shouldn’t simply drop the unused indexes. This patch, like any patch, should probably only be used on a non-production server. A non-production server, no matter how much you try, will NOT have the same queries and data as a production server (you could dump the SQL ge...
This view is most useful when the server has been up and processing long enough that its workload is representative. Otherwise, presence of an index in this view may not be meaningful. The schema_unused_indexes view has these columns: object...
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Finding Unused Indexes Open SQL Server Management Studio located on the program menu. Connect to the database and then paste the TSQL below. This will return the indexes (with associated tables) that are likely candidates for deletion. The TSQL looks for indexes that are...
schema_unused_indexes视图字段含义如下: object_schema:schema名称 OBJECT_NAME:表名 INDEX_NAME:未使用的索引名称 视图定义语句 CREATE OR REPLACE ALGORITHM = MERGE DEFINER = 'root'@'localhost' SQL SECURITY INVOKER VIEW schema_unused_indexes ( object_schema, object_name, index_name ) AS SELECT object...
Here you can set maximum free space as well in shrinkingUSE [Northwind]GODBCC SHRINKDATABASE(N'Northwind', 80 )GOFriday, March 20, 2009 4:59 AMHi,In a Database how many clustered indexs will there. If no of clustered indexes is high, It will effect any performance issues?