一段简单的 T-SQL 脚本示例如下: DECLARE@FragPercentASINT;DECLARE@IndexNameASNVARCHAR(256);DECLARE@TableNameASNVARCHAR(256);-- 游标定义,用于遍历所有索引DECLAREindex_cursorCURSORFORSELECTOBJECT_NAME(i.object_id),i.name,ps.avg_fragmentation_in_percentFROMsys.dm_db_index_physical_stats(DB_ID(),NULL,...
ANDa.index_id=b.index_id WHEREavg_fragmentation_in_percent>0 ORDERBYObjectName,PercentFragmentDESC Defragment Index -- Rebuild or Reorganize For slight level of fragmentation ALTERINDEXIndexName ONTableNameREORGANIZE For severe fragmentation level ALTERINDEXIndexName ONTableNameREBUILD or ALTERINDEXIndexN...
1) At the disk/OS level individual files can become fragmented due to growth over time. This can be addressed by a defragmentation tool at the SAN or Windows level. Ask your storage team about your options there.2) Within a SQL Server database individual pages can become internally ...
Let’s see an example. The first script provided below gives the fragmentation level of a given database including all tables and views in the database and all indexes on these objects. The second script gives the fragmentation level of a particular object in the given database. The details ...
SQL Server only reports on logical index and data page fragmentation and does not have any in-built utility to check on actual physical file fragmentation. It’s up to you to check the fragmentation level of your physical disks using the disk defragmenting utility of your choice. ...
The bottom table has 71429 number of pages in the leaf level, so we are faking the pagecount of top table with 71429 using the undocumented update statistics option(again its undocumented command and not recommended in the production server, we presented it for educational purpose only)....
analyze SQL Server fragmentation levels SQL Fragmentation Analyzer allows database administrator to analyze the fragmentation level of all (or just selected) database tables. The program display color coded results that clearly indicate the fragmentation percentage of each table, along with the index nam...
AFragmentationOptionobject value that specifies the level of detail returned in the results. 傳回值 型別:System.Data. . :: . .DataTable ADataTablesystem object value that contains a list of information about the fragmented data in the table or view. ...
In the query window that opens, typeDBCC SHOWCONTIG ('table_name');replacingtable_namewith the name of the table you wish to analyze. ClickExecuteor pressF5. The results will display information about the fragmentation level of the indexes on the specified table. Look for theScan DensityandLog...
In SQL Server 2005, non-clustered index records can include LOB values asincluded columns(with the storage details exactly the same as for data records) and also can haverow-overflowdata that is pushed off-row (again, in exactly the same way as for data records). ...