У меня очень большая база данных SQL Server 2008 R2 (1.5 ТБ) и будет копировать некоторые данные из столбца в столбец внутри той же таблицы. Мне сказали, что схема имеет большое количество индексов и задавалась вопросом, есть ли запрос по умолчанию или script, который будет перестраивать все индексы. Было также рекомендовано обновлять статистику одновременно?
Каждая из 30 таблиц имеет один кластерный индекс и 13x некластеризованных индексов
Спасибо.
Попробуйте следующий скрипт:
Exec sp_msforeachtable 'SET QUOTED_IDENTIFIER ON; ALTER INDEX ALL ON ? REBUILD'
GO
Также
Я предпочитаю (после длительного поиска) использовать следующий скрипт, он содержит @fillfactor, определяющий, сколько процентов места на каждой странице уровня листа заполнено данными.
DECLARE @TableName VARCHAR(255)
DECLARE @sql NVARCHAR(500)
DECLARE @fillfactor INT
SET @fillfactor = 80
DECLARE TableCursor CURSOR FOR
SELECT QUOTENAME(OBJECT_SCHEMA_NAME([object_id]))+'.' + QUOTENAME(name) AS TableName
FROM sys.tables
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO @TableName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @sql = 'ALTER INDEX ALL ON ' + @TableName + ' REBUILD WITH (FILLFACTOR = ' + CONVERT(VARCHAR(3),@fillfactor) + ')'
EXEC (@sql)
FETCH NEXT FROM TableCursor INTO @TableName
END
CLOSE TableCursor
DEALLOCATE TableCursor
GO
для получения дополнительной информации проверьте следующую ссылку:
и если вы хотите проверить фрагментацию индексов в базе данных, попробуйте следующий скрипт:
SELECT dbschemas.[name] as 'Schema',
dbtables.[name] as 'Table',
dbindexes.[name] as 'Index',
indexstats.avg_fragmentation_in_percent,
indexstats.page_count
FROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, NULL) AS indexstats
INNER JOIN sys.tables dbtables on dbtables.[object_id] = indexstats.[object_id]
INNER JOIN sys.schemas dbschemas on dbtables.[schema_id] = dbschemas.[schema_id]
INNER JOIN sys.indexes AS dbindexes ON dbindexes.[object_id] = indexstats.[object_id]
AND indexstats.index_id = dbindexes.index_id
WHERE indexstats.database_id = DB_ID() AND dbtables.[name] like '%%'
ORDER BY indexstats.avg_fragmentation_in_percent desc
Для получения дополнительной информации, проверьте следующую ссылку:
Лично я всегда был поклонником сценариев Ola Hallengren для поддержания индексов и статистики.
Решение GUI - это План обслуживания.
В этой статье описывается процесс: https://www.simple-talk.com/sql/database-administration/rebuilding-indexes-using-the-ssms-database-maintenance-wizard/
Сценарий Дэниела, кажется, является хорошим всеобъемлющим решением, но даже он признал, что на его ноутбуке не хватило памяти. Вот вариант, который я придумал. Я основал свою процедуру на посте Мохаммада Низамуддина на TechNet. Я добавил начальный цикл курсора, который вытягивает все имена баз данных во временную таблицу, а затем использует ее для извлечения всех имен базовых таблиц из каждой из этих баз данных.
При желании вы можете передать желаемый коэффициент заполнения и указать целевую базу данных, если не хотите переиндексировать все базы данных.
--===============================================================
-- Name: sp_RebuildAllIndexes
-- Arguements: [Fill Factor], [Target Database name]
-- Purpose: Loop through all the databases on a server and
-- compile a list of all the table within them.
-- This list is then used to rebuild indexes for
-- all the tables in all the database. Optionally,
-- you may pass a specific database name if you only
-- want to reindex that target database.
--================================================================
CREATE PROCEDURE sp_RebuildAllIndexes(
@FillFactor INT = 90,
@TargetDatabase NVARCHAR(100) = NULL)
AS
BEGIN
DECLARE @TablesToReIndex TABLE (
TableName VARCHAR(200)
);
DECLARE @DbName VARCHAR(50);
DECLARE @TableSelect VARCHAR(MAX);
DECLARE @DatabasesToIndex CURSOR;
IF ISNULL( @TargetDatabase, '' ) = ''
SET @DatabasesToIndex = CURSOR
FOR SELECT NAME
FROM master..sysdatabases
ELSE
SET @DatabasesToIndex = CURSOR
FOR SELECT NAME
FROM master..sysdatabases
WHERE NAME = @TargetDatabase
OPEN DatabasesToIndex
FETCH NEXT FROM DatabasesToIndex INTO @DbName
WHILE @@FETCH_STATUS = 0
BEGIN
SET @TableSelect = 'INSERT INTO @TablesToReIndex SELECT CONCAT(TABLE_CATALOG, ''.'', TABLE_SCHEMA, ''.'', TABLE_NAME) AS TableName FROM '
+ @DbName
+ '.INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE = ''base table''';
EXEC sp_executesql
@TableSelect;
FETCH NEXT FROM DatabasesToIndex INTO @DbName
END
CLOSE DatabasesToIndex
DEALLOCATE DatabasesToIndex
DECLARE @TableName VARCHAR(255)
DECLARE TableCursor CURSOR FOR
SELECT TableName
FROM @TablesToReIndex
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO @TableName
WHILE @@FETCH_STATUS = 0
BEGIN
DBCC DBREINDEX(@TableName, ' ', @FillFactor)
FETCH NEXT FROM TableCursor INTO @TableName
END
CLOSE TableCursor
DEALLOCATE TableCursor
END
Также хороший script, хотя у моего ноутбука закончилась память, но это было на очень большой таблице
https://basitaalishan.com/2014/02/23/rebuild-all-indexes-on-all-tables-in-the-sql-server-database/
USE [<mydatabasename>]
Go
--/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
--Arguments Data Type Description
-------------- ------------ ------------
[email protected] [int] Specifies a percentage that indicates how full the Database Engine should make the leaf level
-- of each index page during index creation or alteration. The valid inputs for this parameter
-- must be an integer value from 1 to 100 The default is 0.
-- For more information, see http://technet.microsoft.com/en-us/library/ms177459.aspx.
[email protected] [varchar](3) Specifies index padding. The PAD_INDEX option is useful only when FILLFACTOR is specified,
-- because PAD_INDEX uses the percentage specified by FILLFACTOR. If the percentage specified
-- for FILLFACTOR is not large enough to allow for one row, the Database Engine internally
-- overrides the percentage to allow for the minimum. The number of rows on an intermediate
-- index page is never less than two, regardless of how low the value of fillfactor. The valid
-- inputs for this parameter are ON or OFF. The default is OFF.
-- For more information, see http://technet.microsoft.com/en-us/library/ms188783.aspx.
[email protected] [varchar](3) Specifies whether to store temporary sort results in tempdb. The valid inputs for this
-- parameter are ON or OFF. The default is OFF.
-- For more information, see http://technet.microsoft.com/en-us/library/ms188281.aspx.
[email protected] [varchar](3) Specifies whether underlying tables and associated indexes are available for queries and data
-- modification during the index operation. The valid inputs for this parameter are ON or OFF.
-- The default is OFF.
-- Note: Online index operations are only available in Enterprise edition of Microsoft
-- SQL Server 2005 and above.
-- For more information, see http://technet.microsoft.com/en-us/library/ms191261.aspx.
[email protected] [varchar](4) Specifies the data compression option for the specified index, partition number, or range of
-- partitions. The options for this parameter are as follows:
-- > NONE - Index or specified partitions are not compressed.
-- > ROW - Index or specified partitions are compressed by using row compression.
-- > PAGE - Index or specified partitions are compressed by using page compression.
-- The default is NONE.
-- Note: Data compression feature is only available in Enterprise edition of Microsoft
-- SQL Server 2005 and above.
-- For more information about compression, see http://technet.microsoft.com/en-us/library/cc280449.aspx.
[email protected] [int] Overrides the max degree of parallelism configuration option for the duration of the index
-- operation. The valid input for this parameter can be between 0 and 64, but should not exceed
-- number of processors available to SQL Server.
-- For more information, see http://technet.microsoft.com/en-us/library/ms189094.aspx.
--- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
-- Ensure a USE <databasename> statement has been executed first.
SET NOCOUNT ON;
DECLARE @Version [numeric] (18, 10)
,@SQLStatementID [int]
,@CurrentTSQLToExecute [nvarchar](max)
,@FillFactor [int] = 100 -- Change if needed
,@PadIndex [varchar](3) = N'OFF' -- Change if needed
,@SortInTempDB [varchar](3) = N'OFF' -- Change if needed
,@OnlineRebuild [varchar](3) = N'OFF' -- Change if needed
,@LOBCompaction [varchar](3) = N'ON' -- Change if needed
,@DataCompression [varchar](4) = N'NONE' -- Change if needed
,@MaxDOP [int] = NULL -- Change if needed
,@IncludeDataCompressionArgument [char](1);
IF OBJECT_ID(N'TempDb.dbo.#Work_To_Do') IS NOT NULL
DROP TABLE #Work_To_Do
CREATE TABLE #Work_To_Do
(
[sql_id] [int] IDENTITY(1, 1)
PRIMARY KEY ,
[tsql_text] [varchar](1024) ,
[completed] [bit]
)
SET @Version = CAST(LEFT(CAST(SERVERPROPERTY(N'ProductVersion') AS [nvarchar](128)), CHARINDEX('.', CAST(SERVERPROPERTY(N'ProductVersion') AS [nvarchar](128))) - 1) + N'.' + REPLACE(RIGHT(CAST(SERVERPROPERTY(N'ProductVersion') AS [nvarchar](128)), LEN(CAST(SERVERPROPERTY(N'ProductVersion') AS [nvarchar](128))) - CHARINDEX('.', CAST(SERVERPROPERTY(N'ProductVersion') AS [nvarchar](128)))), N'.', N'') AS [numeric](18, 10))
IF @DataCompression IN (N'PAGE', N'ROW', N'NONE')
AND (
@Version >= 10.0
AND SERVERPROPERTY(N'EngineEdition') = 3
)
BEGIN
SET @IncludeDataCompressionArgument = N'Y'
END
IF @IncludeDataCompressionArgument IS NULL
BEGIN
SET @IncludeDataCompressionArgument = N'N'
END
INSERT INTO #Work_To_Do ([tsql_text], [completed])
SELECT 'ALTER INDEX [' + i.[name] + '] ON' + SPACE(1) + QUOTENAME(t2.[TABLE_CATALOG]) + '.' + QUOTENAME(t2.[TABLE_SCHEMA]) + '.' + QUOTENAME(t2.[TABLE_NAME]) + SPACE(1) + 'REBUILD WITH (' + SPACE(1) + + CASE
WHEN @PadIndex IS NULL
THEN 'PAD_INDEX =' + SPACE(1) + CASE i.[is_padded]
WHEN 1
THEN 'ON'
WHEN 0
THEN 'OFF'
END
ELSE 'PAD_INDEX =' + SPACE(1) + @PadIndex
END + CASE
WHEN @FillFactor IS NULL
THEN ', FILLFACTOR =' + SPACE(1) + CONVERT([varchar](3), REPLACE(i.[fill_factor], 0, 100))
ELSE ', FILLFACTOR =' + SPACE(1) + CONVERT([varchar](3), @FillFactor)
END + CASE
WHEN @SortInTempDB IS NULL
THEN ''
ELSE ', SORT_IN_TEMPDB =' + SPACE(1) + @SortInTempDB
END + CASE
WHEN @OnlineRebuild IS NULL
THEN ''
ELSE ', ONLINE =' + SPACE(1) + @OnlineRebuild
END + ', STATISTICS_NORECOMPUTE =' + SPACE(1) + CASE st.[no_recompute]
WHEN 0
THEN 'OFF'
WHEN 1
THEN 'ON'
END + ', ALLOW_ROW_LOCKS =' + SPACE(1) + CASE i.[allow_row_locks]
WHEN 0
THEN 'OFF'
WHEN 1
THEN 'ON'
END + ', ALLOW_PAGE_LOCKS =' + SPACE(1) + CASE i.[allow_page_locks]
WHEN 0
THEN 'OFF'
WHEN 1
THEN 'ON'
END + CASE
WHEN @IncludeDataCompressionArgument = N'Y'
THEN CASE
WHEN @DataCompression IS NULL
THEN ''
ELSE ', DATA_COMPRESSION =' + SPACE(1) + @DataCompression
END
ELSE ''
END + CASE
WHEN @MaxDop IS NULL
THEN ''
ELSE ', MAXDOP =' + SPACE(1) + CONVERT([varchar](2), @MaxDOP)
END + SPACE(1) + ')'
,0
FROM [sys].[tables] t1
INNER JOIN [sys].[indexes] i ON t1.[object_id] = i.[object_id]
AND i.[index_id] > 0
AND i.[type] IN (1, 2)
INNER JOIN [INFORMATION_SCHEMA].[TABLES] t2 ON t1.[name] = t2.[TABLE_NAME]
AND t2.[TABLE_TYPE] = 'BASE TABLE'
INNER JOIN [sys].[stats] AS st WITH (NOLOCK) ON st.[object_id] = t1.[object_id]
AND st.[name] = i.[name]
SELECT @SQLStatementID = MIN([sql_id])
FROM #Work_To_Do
WHERE [completed] = 0
WHILE @SQLStatementID IS NOT NULL
BEGIN
SELECT @CurrentTSQLToExecute = [tsql_text]
FROM #Work_To_Do
WHERE [sql_id] = @SQLStatementID
PRINT @CurrentTSQLToExecute
EXEC [sys].[sp_executesql] @CurrentTSQLToExecute
UPDATE #Work_To_Do
SET [completed] = 1
WHERE [sql_id] = @SQLStatementID
SELECT @SQLStatementID = MIN([sql_id])
FROM #Work_To_Do
WHERE [completed] = 0
END
Замените "ВАШЕ ИМЯ БАЗЫ ДАННЫХ" в приведенном ниже запросе.
DECLARE @Database NVARCHAR(255)
DECLARE @Table NVARCHAR(255)
DECLARE @cmd NVARCHAR(1000)
DECLARE DatabaseCursor CURSOR READ_ONLY FOR
SELECT name FROM master.sys.databases
WHERE name IN ('YOUR DATABASE NAME') -- databases
AND state = 0 -- database is online
AND is_in_standby = 0 -- database is not read only for log shipping
ORDER BY 1
OPEN DatabaseCursor
FETCH NEXT FROM DatabaseCursor INTO @Database
WHILE @@FETCH_STATUS = 0
BEGIN
SET @cmd = 'DECLARE TableCursor CURSOR READ_ONLY FOR SELECT ''['' + table_catalog + ''].['' + table_schema + ''].['' +
table_name + '']'' as tableName FROM [' + @Database + '].INFORMATION_SCHEMA.TABLES WHERE table_type = ''BASE TABLE'''
-- create table cursor
EXEC (@cmd)
OPEN TableCursor
FETCH NEXT FROM TableCursor INTO @Table
WHILE @@FETCH_STATUS = 0
BEGIN
BEGIN TRY
SET @cmd = 'ALTER INDEX ALL ON ' + @Table + ' REBUILD'
PRINT @cmd -- uncomment if you want to see commands
EXEC (@cmd)
END TRY
BEGIN CATCH
PRINT '---'
PRINT @cmd
PRINT ERROR_MESSAGE()
PRINT '---'
END CATCH
FETCH NEXT FROM TableCursor INTO @Table
END
CLOSE TableCursor
DEALLOCATE TableCursor
FETCH NEXT FROM DatabaseCursor INTO @Database
END
CLOSE DatabaseCursor
DEALLOCATE DatabaseCursor
DECLARE @String NVARCHAR(MAX);
USE Databse Name;
SELECT @String
=
(
SELECT 'ALTER INDEX [' + dbindexes.[name] + '] ON [' + db.name + '].[' + dbschemas.[name] + '].[' + dbtables.[name]
+ '] REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = PAGE);' + CHAR(10) AS [text()]
FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL, NULL) AS indexstats
INNER JOIN sys.tables dbtables
ON dbtables.[object_id] = indexstats.[object_id]
INNER JOIN sys.schemas dbschemas
ON dbtables.[schema_id] = dbschemas.[schema_id]
INNER JOIN sys.indexes AS dbindexes
ON dbindexes.[object_id] = indexstats.[object_id]
AND indexstats.index_id = dbindexes.index_id
INNER JOIN sys.databases AS db
ON db.database_id = indexstats.database_id
WHERE dbindexes.name IS NOT NULL
AND indexstats.database_id = DB_ID()
AND indexstats.avg_fragmentation_in_percent >= 10
ORDER BY indexstats.page_count DESC
FOR XML PATH('')
);
EXEC (@String);