检查索引的碎片

SELECT
    object_name(object_id),
    object_id AS objectid,
    index_id AS indexid,
    partition_number AS partitionnum,
    avg_fragmentation_in_percent AS frag_in_percent
--INTO temp_work_to_do_new

FROM sys.dm_db_index_physical_stats(db_id(), NULL, NULL, NULL, 'LIMITED')
WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 0
ORDER BY avg_fragmentation_in_percent DESC;

检查索引的使用情况

select object_name(a.object_id) as table_name ,a.name index_name from sys.indexes a inner join sys.dm_db_index_usage_stats b on a.object_id=b.object_id and a.index_id=b.index_id where user_seeks=0 and user_scans=0 and user_lookups=0 and database_id=5 and a.index_id>0 order by table_name

重组或者重建索引的存储过程

USE [OTS]
GO
/****** Object:  StoredProcedure [dbo].[OTS_RebuildIndex]    Script. Date: 05/10/2011 19:00:16 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[OTS_RebuildIndex]
 
AS
BEGIN
 SET NOCOUNT ON;
DECLARE @objectid int;
DECLARE @indexid int;
DECLARE @partitioncount bigint;
DECLARE @schemaname sysname;
DECLARE @objectname sysname;
DECLARE @indexname sysname;
DECLARE @partitionnum bigint;
DECLARE @partitions bigint;
DECLARE @frag float;
DECLARE @command varchar(8000);
-- ensure the temporary table does not exist
IF EXISTS (SELECT name FROM sys.objects WHERE name = 'work_to_do')
    DROP TABLE work_to_do;
-- conditionally select from the function, converting object and index IDs to names.
SELECT
    object_id AS objectid,
    index_id AS indexid,
    partition_number AS partitionnum,
    avg_fragmentation_in_percent AS frag
INTO work_to_do
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'LIMITED')
WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 1;
-- Declare the cursor for the list of partitions to be processed.
DECLARE partitions CURSOR FOR SELECT * FROM work_to_do;

-- Open the cursor.
OPEN partitions;

-- Loop through the partitions.
FETCH NEXT
   FROM partitions
   INTO @objectid, @indexid, @partitionnum, @frag;

WHILE @@FETCH_STATUS = 0
    BEGIN;
        SELECT @objectname = o.name, @schemaname = s.name
        FROM sys.objects AS o
        JOIN sys.schemas as s ON s.schema_id = o.schema_id
        WHERE o.object_id = @objectid;

        SELECT @indexname = name
        FROM sys.indexes
        WHERE  object_id = @objectid AND index_id = @indexid;

        SELECT @partitioncount = count (*)
        FROM sys.partitions
        WHERE object_id = @objectid AND index_id = @indexid;
  print(@objectname+':'+@indexname)
-- 30 is an arbitrary decision point at which to switch between reorganizing and rebuilding
IF @frag < 30.0
    BEGIN;
    SELECT @command = 'ALTER INDEX [' + @indexname + '] ON ' + @schemaname + '.' + @objectname + ' REORGANIZE';
    IF @partitioncount > 1
        SELECT @command = @command + ' PARTITION=' + CONVERT (CHAR, @partitionnum);
    EXEC (@command);
    END;

IF @frag >= 30.0
    BEGIN;
    SELECT @command = 'ALTER INDEX [' + @indexname +'] ON ' + @schemaname + '.' + @objectname + ' REBUILD PARTITION = ALL WITH
(DATA_COMPRESSION = ROW)';
  
    EXEC (@command);
    END;
 
PRINT 'Executed ' + @command;

FETCH NEXT FROM partitions INTO @objectid, @indexid, @partitionnum, @frag;
END;
-- Close and deallocate the cursor.
CLOSE partitions;
DEALLOCATE partitions;

-- drop the temporary table
IF EXISTS (SELECT name FROM sys.objects WHERE name = 'work_to_do')
    DROP TABLE work_to_do;

END