Penafian: Skrip ini telah diuji pada SQL Server 2005/2008. Namun, kode dan informasi ini diberikan "SEBAGAIMANA ADANYA" tanpa jaminan dalam bentuk apa pun, baik tersurat maupun tersirat, termasuk tetapi tidak terbatas pada jaminan tersirat atau dapat diperjualbelikan dan / atau kesesuaian untuk tujuan tertentu. Seperti biasa, uji ini di lingkungan pengujian Anda sebelum mencoba untuk menyebarkan ke lingkungan produksi Anda. Sekarang itu keluar dari jalan ...
Salah satu masalah yang saya hadapi ketika berhadapan dengan DMV indeks adalah bahwa mereka tidak dapat dikorelasikan. Artinya, Anda tidak dapat menggunakan CROSS / OUTER BERLAKU terhadap mereka, untuk membatasi indeks yang Anda lakukan scan. Untuk mengatasi ini, saya menggunakan fungsi wrapper, untuk DMV indeks fisik dan operasional, ke database master saya:
Fisik:
ALTER FUNCTION [dbo].[tfn_IndexPhysicalStats_select]
(
@DatabaseID SMALLINT = 0,
@ObjectID INT = 0,
@IndexID INT = -1,
@PartitionNumber INT = 0,
@Mode NVARCHAR(20) = NULL
)
RETURNS @IndexPhysicalStats TABLE
(
database_id SMALLINT NOT NULL,
object_id INT NOT NULL,
index_id INT NOT NULL,
partition_number INT NOT NULL,
index_type_desc NVARCHAR(60) NULL,
alloc_unit_type_desc NVARCHAR(60) NULL,
index_depth TINYINT NOT NULL,
index_level TINYINT NOT NULL,
avg_fragmentation_in_percent FLOAT NULL,
fragment_count BIGINT NULL,
avg_fragment_size_in_pages FLOAT NULL,
page_count BIGINT NOT NULL,
avg_page_space_used_in_percent FLOAT NULL,
record_count BIGINT NULL,
ghost_record_count BIGINT NULL,
version_ghost_record_count BIGINT NULL,
min_record_size_in_bytes INT NULL,
max_record_size_in_bytes INT NULL,
avg_record_size_in_bytes FLOAT NULL,
forwarded_record_count BIGINT NULL
)
AS
BEGIN
INSERT INTO @IndexPhysicalStats
(
database_id,
object_id,
index_id,
partition_number,
index_type_desc,
alloc_unit_type_desc,
index_depth,
index_level,
avg_fragmentation_in_percent,
fragment_count,
avg_fragment_size_in_pages,
page_count,
avg_page_space_used_in_percent,
record_count,
ghost_record_count,
version_ghost_record_count,
min_record_size_in_bytes,
max_record_size_in_bytes,
avg_record_size_in_bytes,
forwarded_record_count
)
SELECT
ddips.database_id,
ddips.object_id,
ddips.index_id,
ddips.partition_number,
ddips.index_type_desc,
ddips.alloc_unit_type_desc,
ddips.index_depth,
ddips.index_level,
ddips.avg_fragmentation_in_percent,
ddips.fragment_count,
ddips.avg_fragment_size_in_pages,
ddips.page_count,
ddips.avg_page_space_used_in_percent,
ddips.record_count,
ddips.ghost_record_count,
ddips.version_ghost_record_count,
ddips.min_record_size_in_bytes,
ddips.max_record_size_in_bytes,
ddips.avg_record_size_in_bytes,
ddips.forwarded_record_count
FROM sys.dm_db_index_physical_stats
(
@DatabaseID,
@ObjectID,
@IndexID,
@PartitionNumber,
@Mode
) AS ddips;
RETURN;
END
Operasional:
ALTER FUNCTION [dbo].[tfn_IndexOperationalStats_select]
(
@DatabaseID SMALLINT = 0,
@TableID INT = 0,
@IndexID INT = -1,
@PartitionNumber INT = 0
)
RETURNS @IndexOperationalStats TABLE
(
database_id SMALLINT NOT NULL,
object_id INT NOT NULL,
index_id INT NOT NULL,
partition_number INT NOT NULL,
leaf_insert_count BIGINT NULL,
leaf_delete_count BIGINT NULL,
leaf_update_count BIGINT NULL,
leaf_ghost_count BIGINT NULL,
nonleaf_insert_count BIGINT NULL,
nonleaf_delete_count BIGINT NULL,
nonleaf_update_count BIGINT NULL,
leaf_allocation_count BIGINT NULL,
nonleaf_allocation_count BIGINT NULL,
leaf_page_merge_count BIGINT NULL,
nonleaf_page_merge_count BIGINT NULL,
range_scan_count BIGINT NULL,
singleton_lookup_count BIGINT NULL,
forwarded_fetch_count BIGINT NULL,
lob_fetch_in_pages BIGINT NULL,
lob_fetch_in_bytes BIGINT NULL,
lob_orphan_create_count BIGINT NULL,
lob_orphan_insert_count BIGINT NULL,
row_overflow_fetch_in_pages BIGINT NULL,
row_overflow_fetch_in_bytes BIGINT NULL,
column_value_push_off_row_count BIGINT NULL,
column_value_pull_in_row_count BIGINT NULL,
row_lock_count BIGINT NULL,
row_lock_wait_count BIGINT NULL,
row_lock_wait_in_ms BIGINT NULL,
page_lock_count BIGINT NULL,
page_lock_wait_count BIGINT NULL,
page_lock_wait_in_ms BIGINT NULL,
index_lock_promotion_attempt_count BIGINT NULL,
index_lock_promotion_count BIGINT NULL,
page_latch_wait_count BIGINT NULL,
page_latch_wait_in_ms BIGINT NULL,
page_io_latch_wait_count BIGINT NULL,
page_io_latch_wait_in_ms BIGINT NULL
PRIMARY KEY CLUSTERED
(
database_id ASC,
object_id ASC,
index_id ASC,
partition_number ASC
)
)
AS
BEGIN
INSERT INTO @IndexOperationalStats
(
database_id,
object_id,
index_id,
partition_number,
leaf_insert_count,
leaf_delete_count,
leaf_update_count,
leaf_ghost_count,
nonleaf_insert_count,
nonleaf_delete_count,
nonleaf_update_count,
leaf_allocation_count,
nonleaf_allocation_count,
leaf_page_merge_count,
nonleaf_page_merge_count,
range_scan_count,
singleton_lookup_count,
forwarded_fetch_count,
lob_fetch_in_pages,
lob_fetch_in_bytes,
lob_orphan_create_count,
lob_orphan_insert_count,
row_overflow_fetch_in_pages,
row_overflow_fetch_in_bytes,
column_value_push_off_row_count,
column_value_pull_in_row_count,
row_lock_count,
row_lock_wait_count,
row_lock_wait_in_ms,
page_lock_count,
page_lock_wait_count,
page_lock_wait_in_ms,
index_lock_promotion_attempt_count,
index_lock_promotion_count,
page_latch_wait_count,
page_latch_wait_in_ms,
page_io_latch_wait_count,
page_io_latch_wait_in_ms
)
SELECT
ddios.database_id,
ddios.object_id,
ddios.index_id,
ddios.partition_number,
ddios.leaf_insert_count,
ddios.leaf_delete_count,
ddios.leaf_update_count,
ddios.leaf_ghost_count,
ddios.nonleaf_insert_count,
ddios.nonleaf_delete_count,
ddios.nonleaf_update_count,
ddios.leaf_allocation_count,
ddios.nonleaf_allocation_count,
ddios.leaf_page_merge_count,
ddios.nonleaf_page_merge_count,
ddios.range_scan_count,
ddios.singleton_lookup_count,
ddios.forwarded_fetch_count,
ddios.lob_fetch_in_pages,
ddios.lob_fetch_in_bytes,
ddios.lob_orphan_create_count,
ddios.lob_orphan_insert_count,
ddios.row_overflow_fetch_in_pages,
ddios.row_overflow_fetch_in_bytes,
ddios.column_value_push_off_row_count,
ddios.column_value_pull_in_row_count,
ddios.row_lock_count,
ddios.row_lock_wait_count,
ddios.row_lock_wait_in_ms,
ddios.page_lock_count,
ddios.page_lock_wait_count,
ddios.page_lock_wait_in_ms,
ddios.index_lock_promotion_attempt_count,
ddios.index_lock_promotion_count,
ddios.page_latch_wait_count,
ddios.page_latch_wait_in_ms,
ddios.page_io_latch_wait_count,
ddios.page_io_latch_wait_in_ms
FROM sys.dm_db_index_operational_stats
(
@DatabaseID,
@TableID,
@IndexID,
@PartitionNumber
) AS ddios;
RETURN;
END
Saya kemudian merujuk fungsi ini dalam pekerjaan pemeliharaan indeks saya dengan cara berikut:
DECLARE
@DDL NVARCHAR(MAX);
DECLARE ddl_cursor CURSOR
FOR
SELECT
CONVERT(NVARCHAR(MAX), DDL.DDL) AS DDL
FROM
(
SELECT
MasterIndexes.SchemaName,
MasterIndexes.TableName,
MasterIndexes.IndexName,
MasterIndexes.DatabaseID,
MasterIndexes.ObjectID,
MasterIndexes.IndexID,
MasterIndexes.PartitionNumber,
MasterIndexes.type_desc,
MasterIndexes.is_unique,
MasterIndexes.is_primary_key,
MasterIndexes.is_unique_constraint,
MasterIndexes.fill_factor,
MasterIndexes.allow_row_locks,
MasterIndexes.allow_page_locks,
MasterIndexes.UpdateStatisticsIndicator,
1 AS SortInTempDB,
CASE
WHEN CONVERT(VARCHAR(100), SERVERPROPERTY('edition')) LIKE 'Enterprise Edition%' THEN 1
ELSE 0
END AS OnlineIndicator,
CASE
WHEN
ips.avg_fragmentation_in_percent BETWEEN CONVERT(FLOAT, 10) AND CONVERT(FLOAT, 30)
AND ips.page_count >= 100
THEN
1
ELSE
0
END AS ReorganizationIndicator,
CASE
WHEN
(
ips.avg_fragmentation_in_percent >= 30
AND ips.page_count >= 100
)
OR
(
ips.avg_fragmentation_in_percent BETWEEN CONVERT(FLOAT, 10) AND CONVERT(FLOAT, 30)
AND ips.page_count < 100
)
THEN
1
ELSE
0
END AS RebuildIndicator
FROM
(
SELECT
s.name AS SchemaName,
t.name AS TableName,
ix.name AS IndexName,
DB_ID() AS DatabaseID,
ddps.object_id AS ObjectID,
ddps.index_id AS IndexID,
ddps.partition_number AS PartitionNumber,
ix.type_desc,
ix.is_unique,
ix.is_primary_key,
ix.is_unique_constraint,
ix.fill_factor,
ix.allow_row_locks,
ix.allow_page_locks,
1 AS UpdateStatisticsIndicator
FROM sys.schemas AS s
INNER JOIN sys.tables AS t
ON s.schema_id = t.schema_id
INNER JOIN sys.indexes AS ix
ON t.object_id = ix.object_id
INNER JOIN sys.dm_db_partition_stats AS ddps
ON ix.object_id = ddps.object_id
AND ix.index_id = ddps.index_id
CROSS APPLY master.dbo.tfn_IndexOperationalStats_select
(
DB_ID(),
t.object_id,
ix.index_id,
NULL
) AS ios
WHERE
CASE
WHEN ddps.row_count = 0 THEN 0
ELSE
(
(
CONVERT
(
FLOAT,
(
ios.nonleaf_insert_count +
ios.nonleaf_update_count +
ios.leaf_insert_count +
ios.leaf_update_count
)
) /
CONVERT
(
FLOAT,
ddps.row_count
)
) * 100.0
)
END >= 10.0
AND t.is_ms_shipped = 0
AND t.name NOT LIKE 'MSmerge%'
AND ix.index_id > 0
) AS MasterIndexes
CROSS APPLY master.dbo.tfn_IndexPhysicalStats_select
(
MasterIndexes.DatabaseID,
MasterIndexes.ObjectID,
MasterIndexes.IndexID,
MasterIndexes.PartitionNumber,
'SAMPLED'
) AS ips
) AS MasterIndexList
CROSS APPLY
(
SELECT
'ALTER INDEX ' +
MasterIndexList.IndexName +
' ON ' +
MasterIndexList.SchemaName + '.' + MasterIndexList.TableName +
' REBUILD WITH(' +
'FILLFACTOR = ' +
CASE
WHEN MasterIndexList.fill_factor = 0 THEN '100'
ELSE CONVERT(VARCHAR(3), MasterIndexList.fill_factor)
END + ', ' +
'SORT_IN_TEMPDB = ' +
CASE
WHEN MasterIndexList.SortInTempDB = 1 THEN 'ON'
ELSE 'OFF'
END + ', ' +
'ONLINE = ' +
CASE
WHEN MasterIndexList.OnlineIndicator = 1 THEN 'ON'
ELSE 'OFF'
END + ', ' +
'ALLOW_ROW_LOCKS = ' +
CASE
WHEN MasterIndexList.[allow_row_locks] = 1 THEN 'ON'
ELSE 'OFF'
END + ', ' +
'ALLOW_PAGE_LOCKS = ' +
CASE
WHEN MasterIndexList.[allow_page_locks] = 1 THEN 'ON'
ELSE 'OFF'
END + ');' AS [DDL],
1 AS DDLOrdinal
WHERE MasterIndexList.RebuildIndicator = 1
UNION ALL
SELECT
'ALTER INDEX ' +
MasterIndexList.IndexName +
' ON ' +
MasterIndexList.SchemaName + '.' + MasterIndexList.TableName +
' REORGANIZE;' AS [DDL],
2 AS DDLOrdinal
WHERE MasterIndexList.ReorganizationIndicator = 1
UNION ALL
SELECT
'UPDATE STATISTICS ' +
MasterIndexList.SchemaName + '.' + MasterIndexList.TableName + ' ' +
MasterIndexList.IndexName + ' ' +
'WITH FULLSCAN;' AS [DDL],
3 AS DDLOrdinal
WHERE MasterIndexList.UpdateStatisticsIndicator = 1
AND MasterIndexList.RebuildIndicator = 0
AND STATS_DATE(MasterIndexList.ObjectID, MasterIndexList.IndexID) <= DATEADD(hh, -20, GETDATE())
) AS [DDL]
ORDER BY
ObjectID ASC,
IndexID ASC,
DDLOrdinal ASC;
OPEN ddl_cursor;
FETCH NEXT FROM ddl_cursor
INTO @DDL;
WHILE @@FETCH_STATUS = 0
BEGIN
EXECUTE sys.sp_executesql
@stmt = @DDL;
FETCH NEXT FROM ddl_cursor
INTO @DDL;
END
CLOSE ddl_cursor;
DEALLOCATE ddl_cursor;
GO
Seperti biasa, jarak tempuh Anda mungkin bervariasi, tetapi jangan ragu untuk menggunakan / mengubah skrip ini sesuai dengan kebutuhan Anda.
Semoga yang bagus,
Mat