Rebuild and Reorganize Fragmented Indexes

This script will automatically determine whether a rebuild or a reorganize should be used according to the fragmentation of the index. It will then execute the appropriate command. Note that performing index rebuilds online during production hours will cause contention. [cc lang=”sql”] SET NOCOUNT ON; DECLARE @objectid int; DECLARE @indexid int; DECLARE @partitioncount bigint; DECLARE @schemaname nvarchar(258); DECLARE @objectname nvarchar(258); DECLARE @indexname nvarchar(258); 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’) DROP TABLE work; — 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 FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, ‘LIMITED’) WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 0; — Declare the cursor for the list of partitions to be processed. DECLARE partitions CURSOR FOR SELECT * FROM work; — 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 = QUOTENAME(o.name), @schemaname = QUOTENAME(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 = QUOTENAME(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; — 30 is the decision point at which to switch — between […]