microsoft
/
azure-sql-tips
зеркало из https://github.com/microsoft/azure-sql-tips.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность

Added details to space tips

This commit is contained in:
Dimitri Furman 2021-01-07 10:43:36 -05:00
Родитель 105dd6afa6
Коммит 8e586d542e
1 изменённых файлов: 87 добавлений и 65 удалений
Показать статистику Скачать Patch файл Скачать Diff файл Показать все файлы Свернуть все файлы

152
sqldb-tips/get-sqldb-tips.sql
Просмотреть файл

@ -2,7 +2,7 @@
Returns a set of tips to improve database design, health, and performance in Azure SQL Database. Returns a set of tips to improve database design, health, and performance in Azure SQL Database.
For a detailed description and the latest version of the script, see https://aka.ms/sqldbtips For a detailed description and the latest version of the script, see https://aka.ms/sqldbtips
v20210106.1 v20210107.1
*/ */
-- Set to 1 to output tips as a JSON value -- Set to 1 to output tips as a JSON value
@ -165,7 +165,7 @@ BEGIN TRY
DECLARE @EngineEdition int = CAST(SERVERPROPERTY('EngineEdition') AS int); DECLARE @EngineEdition int = CAST(SERVERPROPERTY('EngineEdition') AS int);
IF @EngineEdition NOT IN (5,8) IF @EngineEdition NOT IN (5,8)
THROW 50005, 'This script runs on Azure SQL Database and Azure SQL Managed Instance only.', 1; THROW 50005, 'This script is for Azure SQL Database and Azure SQL Managed Instance only.', 1;
-- Bail out if current CPU utilization is very high, to avoid impacting workloads -- Bail out if current CPU utilization is very high, to avoid impacting workloads
IF EXISTS ( IF EXISTS (
@ -184,7 +184,7 @@ IF EXISTS (
rs.avg_instance_cpu_percent > 95 rs.avg_instance_cpu_percent > 95
) )
) )
THROW 50010, 'CPU utilization is too high. Execute script at a later time.', 1; THROW 50010, 'CPU utilization is too high. Execute the script at a later time.', 1;
IF DB_NAME() = 'master' AND @EngineEdition = 5 IF DB_NAME() = 'master' AND @EngineEdition = 5
THROW 50015, 'Execute this script in a user database, not in the ''master'' database.', 1; THROW 50015, 'Execute this script in a user database, not in the ''master'' database.', 1;
@ -192,47 +192,47 @@ IF DB_NAME() = 'master' AND @EngineEdition = 5
-- Define all tips -- Define all tips
INSERT INTO @TipDefinition (tip_id, tip_name, confidence_percent, tip_url) INSERT INTO @TipDefinition (tip_id, tip_name, confidence_percent, tip_url)
VALUES VALUES
(1000, 'Reduce MAXDOP on all replicas', 90, 'https://aka.ms/sqldbtips#1000'), (1000, 'Reduce MAXDOP on all replicas', 90, 'https://aka.ms/sqldbtips#1000'),
(1010, 'Reduce MAXDOP on primary', 90, 'https://aka.ms/sqldbtips#1010'), (1010, 'Reduce MAXDOP on primary', 90, 'https://aka.ms/sqldbtips#1010'),
(1020, 'Reduce MAXDOP on secondaries', 90, 'https://aka.ms/sqldbtips#1020'), (1020, 'Reduce MAXDOP on secondaries', 90, 'https://aka.ms/sqldbtips#1020'),
(1030, 'Use the latest database compatibility level', 70, 'https://aka.ms/sqldbtips#1030'), (1030, 'Use the latest database compatibility level', 70, 'https://aka.ms/sqldbtips#1030'),
(1040, 'Enable auto-create statistics', 95, 'https://aka.ms/sqldbtips#1040'), (1040, 'Enable auto-create statistics', 95, 'https://aka.ms/sqldbtips#1040'),
(1050, 'Enable auto-update statistics', 95, 'https://aka.ms/sqldbtips#1050'), (1050, 'Enable auto-update statistics', 95, 'https://aka.ms/sqldbtips#1050'),
(1060, 'Enable RCSI', 80, 'https://aka.ms/sqldbtips#1060'), (1060, 'Enable RCSI', 80, 'https://aka.ms/sqldbtips#1060'),
(1070, 'Enable Query Store', 90, 'https://aka.ms/sqldbtips#1070'), (1070, 'Enable Query Store', 90, 'https://aka.ms/sqldbtips#1070'),
(1071, 'Change Query Store operation mode to read-write', 90, 'https://aka.ms/sqldbtips#1071'), (1071, 'Change Query Store operation mode to read-write', 90, 'https://aka.ms/sqldbtips#1071'),
(1072, 'Change Query Store capture mode from NONE to AUTO/ALL', 90, 'https://aka.ms/sqldbtips#1072'), (1072, 'Change Query Store capture mode from NONE to AUTO/ALL', 90, 'https://aka.ms/sqldbtips#1072'),
(1080, 'Disable AUTO_SHRINK', 99, 'https://aka.ms/sqldbtips#1080'), (1080, 'Disable AUTO_SHRINK', 99, 'https://aka.ms/sqldbtips#1080'),
(1100, 'Avoid GUID leading columns in btree indexes', 60, 'https://aka.ms/sqldbtips#1100'), (1100, 'Avoid GUID leading columns in btree indexes', 60, 'https://aka.ms/sqldbtips#1100'),
(1110, 'Enable FLGP auto-tuning', 95, 'https://aka.ms/sqldbtips#1110'), (1110, 'Enable FLGP auto-tuning', 95, 'https://aka.ms/sqldbtips#1110'),
(1120, 'Used space is close to MAXSIZE', 80, 'https://aka.ms/sqldbtips#1120'), (1120, 'Used data size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtips#1120'),
(1130, 'Allocated space is close to MAXSIZE', 60, 'https://aka.ms/sqldbtips#1130'), (1130, 'Allocated data size is close to MAXSIZE', 60, 'https://aka.ms/sqldbtips#1130'),
(1140, 'Allocated space is much larger than used space', 50, 'https://aka.ms/sqldbtips#1140'), (1140, 'Allocated data size is much larger than used data size', 50, 'https://aka.ms/sqldbtips#1140'),
(1150, 'Recent CPU throttling found', 90, 'https://aka.ms/sqldbtips#1150'), (1150, 'Recent CPU throttling found', 90, 'https://aka.ms/sqldbtips#1150'),
(1160, 'Recent out of memory errors found', 80, 'https://aka.ms/sqldbtips#1160'), (1160, 'Recent out of memory errors found', 80, 'https://aka.ms/sqldbtips#1160'),
(1165, 'Recent memory grant waits and timeouts found', 70, 'https://aka.ms/sqldbtips#1165'), (1165, 'Recent memory grant waits and timeouts found', 70, 'https://aka.ms/sqldbtips#1165'),
(1170, 'Nonclustered indexes with low reads found', 60, 'https://aka.ms/sqldbtips#1170'), (1170, 'Nonclustered indexes with low reads found', 60, 'https://aka.ms/sqldbtips#1170'),
(1180, 'ROW or PAGE compression opportunities may exist', 65, 'https://aka.ms/sqldbtips#1180'), (1180, 'ROW or PAGE compression opportunities may exist', 65, 'https://aka.ms/sqldbtips#1180'),
(1190, 'Transaction log IO is close to limit', 70, 'https://aka.ms/sqldbtips#1190'), (1190, 'Transaction log IO is close to limit', 70, 'https://aka.ms/sqldbtips#1190'),
(1200, 'Plan cache is bloated by single-use plans', 90, 'https://aka.ms/sqldbtips#1200'), (1200, 'Plan cache is bloated by single-use plans', 90, 'https://aka.ms/sqldbtips#1200'),
(1210, 'Missing indexes may be impacting performance', 70, 'https://aka.ms/sqldbtips#1210'), (1210, 'Missing indexes may be impacting performance', 70, 'https://aka.ms/sqldbtips#1210'),
(1220, 'Redo queue or a secondary replica is large', 60, 'https://aka.ms/sqldbtips#1220'), (1220, 'Redo queue or a secondary replica is large', 60, 'https://aka.ms/sqldbtips#1220'),
(1230, 'Data IOPS are close to workload group limit', 70, 'https://aka.ms/sqldbtips#1230'), (1230, 'Data IOPS are close to workload group limit', 70, 'https://aka.ms/sqldbtips#1230'),
(1240, 'Workload group IO governance impact is significant', 40, 'https://aka.ms/sqldbtips#1240'), (1240, 'Workload group IO governance impact is significant', 40, 'https://aka.ms/sqldbtips#1240'),
(1250, 'Data IOPS are close to resource pool limit', 70, 'https://aka.ms/sqldbtips#1250'), (1250, 'Data IOPS are close to resource pool limit', 70, 'https://aka.ms/sqldbtips#1250'),
(1260, 'Resouce pool IO governance impact is significant', 40, 'https://aka.ms/sqldbtips#1260'), (1260, 'Resouce pool IO governance impact is significant', 40, 'https://aka.ms/sqldbtips#1260'),
(1270, 'Persistent Version Store size is large', 70, 'https://aka.ms/sqldbtips#1270'), (1270, 'Persistent Version Store size is large', 70, 'https://aka.ms/sqldbtips#1270'),
(1280, 'Paused resumable index operations found', 90, 'https://aka.ms/sqldbtips#1280'), (1280, 'Paused resumable index operations found', 90, 'https://aka.ms/sqldbtips#1280'),
(1290, 'Clustered columnstore candidates found', 50, 'https://aka.ms/sqldbtips#1290'), (1290, 'Clustered columnstore candidates found', 50, 'https://aka.ms/sqldbtips#1290'),
(1300, 'Geo-replication state may be unhealthy', 70, 'https://aka.ms/sqldbtips#1300'), (1300, 'Geo-replication state may be unhealthy', 70, 'https://aka.ms/sqldbtips#1300'),
(1310, 'Last partitions are not empty', 80, 'https://aka.ms/sqldbtips#1310'), (1310, 'Last partitions are not empty', 80, 'https://aka.ms/sqldbtips#1310'),
(1320, 'Top queries should be investigated and tuned', 90, 'https://aka.ms/sqldbtips#1320'), (1320, 'Top queries should be investigated and tuned', 90, 'https://aka.ms/sqldbtips#1320'),
(1330, 'Tempdb data allocated size is close to MAXSIZE', 70, 'https://aka.ms/sqldbtips#1330'), (1330, 'Tempdb data allocated size is close to MAXSIZE', 70, 'https://aka.ms/sqldbtips#1330'),
(1340, 'Tempdb data used size is close to MAXSIZE', 95, 'https://aka.ms/sqldbtips#1340'), (1340, 'Tempdb data used size is close to MAXSIZE', 95, 'https://aka.ms/sqldbtips#1340'),
(1350, 'Tempdb log allocated size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtips#1350'), (1350, 'Tempdb log allocated size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtips#1350'),
(1360, 'Worker utilization is close to workload group limit', 80, 'https://aka.ms/sqldbtips#1360'), (1360, 'Worker utilization is close to workload group limit', 80, 'https://aka.ms/sqldbtips#1360'),
(1370, 'Worker utilization is close to resource pool limit', 80, 'https://aka.ms/sqldbtips#1370'), (1370, 'Worker utilization is close to resource pool limit', 80, 'https://aka.ms/sqldbtips#1370'),
(1380, 'Notable network connectivity events found', 50, 'https://aka.ms/sqldbtips#1380') (1380, 'Notable network connectivity events found', 50, 'https://aka.ms/sqldbtips#1380')
; ;
-- MAXDOP -- MAXDOP
@ -458,22 +458,33 @@ WHERE name = 'FORCE_LAST_GOOD_PLAN'
; ;
-- Used space close to maxsize -- Used space close to maxsize
INSERT INTO @DetectedTip (tip_id) WITH space_used AS
SELECT 1120 AS tip_id (
SELECT SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint) * 8 / 1024.) AS space_used_mb,
CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 AS max_size_mb
FROM sys.database_files FROM sys.database_files
WHERE @EngineEdition = 5 WHERE @EngineEdition = 5
AND AND
type_desc = 'ROWS' type_desc = 'ROWS'
AND AND
CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) <> -1 -- not applicable to Hyperscale CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) <> -1 -- not applicable to Hyperscale
HAVING SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint) * 8 / 1024.) HAVING COUNT(1) > 0
> )
@UsedToMaxsizeSpaceThresholdRatio * CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 -- used space > n% of db maxsize INSERT INTO @DetectedTip (tip_id, details)
SELECT 1120 AS tip_id,
CONCAT(
'Used data size (MB): ', FORMAT(space_used_mb, '#,0.00'),
', maximum data size (MB): ', FORMAT(max_size_mb, '#,0.00')
)
FROM space_used
WHERE space_used_mb > @UsedToMaxsizeSpaceThresholdRatio * max_size_mb -- used space > n% of db maxsize
; ;
-- Allocated space close to maxsize -- Allocated space close to maxsize
INSERT INTO @DetectedTip (tip_id) WITH space_allocated AS
SELECT 1130 AS tip_id (
SELECT SUM(CAST(size AS bigint) * 8 / 1024.) AS space_allocated_mb,
CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 AS max_size_mb
FROM sys.database_files FROM sys.database_files
WHERE @EngineEdition = 5 WHERE @EngineEdition = 5
AND AND
@ -481,28 +492,39 @@ WHERE @EngineEdition = 5
AND AND
CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) <> -1 -- not applicable to Hyperscale CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) <> -1 -- not applicable to Hyperscale
AND AND
DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical') DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical') -- not relevant for remote storage SLOs
HAVING SUM(CAST(size AS bigint) * 8 / 1024.) HAVING COUNT(1) > 0
> )
@AllocatedToMaxsizeSpaceThresholdRatio * CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 -- allocated space > n% of db maxsize INSERT INTO @DetectedTip (tip_id, details)
SELECT 1130 AS tip_id,
CONCAT(
'Allocated data size (MB): ', FORMAT(space_allocated_mb, '#,0.00'),
', maximum data size (MB): ', FORMAT(max_size_mb, '#,0.00')
)
FROM space_allocated
WHERE space_allocated_mb > @AllocatedToMaxsizeSpaceThresholdRatio * max_size_mb -- allocated space > n% of db maxsize
; ;
-- Allocated space >> used space -- Allocated space >> used space
WITH allocated_used_space AS WITH allocated_used_space AS
( (
SELECT SUM(CAST(size AS bigint)) AS allocated_space, SELECT SUM(CAST(size AS bigint) * 8 / 1024.) AS space_allocated_mb,
SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint)) AS used_space SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint)) / 1024. / 1024 AS space_used_mb
FROM sys.database_files FROM sys.database_files
WHERE type_desc = 'ROWS' WHERE type_desc = 'ROWS'
) )
INSERT INTO @DetectedTip (tip_id) INSERT INTO @DetectedTip (tip_id, details)
SELECT 1140 AS tip_id SELECT 1140 AS tip_id,
CONCAT(
'Used data size (MB): ', FORMAT(space_used_mb, '#,0.00'),
', allocated data size (MB): ', FORMAT(space_allocated_mb, '#,0.00')
)
FROM allocated_used_space FROM allocated_used_space
WHERE used_space * 8 / 1024. > @UsedToAllocatedSpaceDbMinSizeMB -- not relevant for small databases WHERE space_used_mb * 8 / 1024. > @UsedToAllocatedSpaceDbMinSizeMB -- not relevant for small databases
AND AND
@UsedToAllocatedSpaceThresholdRatio * allocated_space > used_space -- allocated space is more than N times used space @UsedToAllocatedSpaceThresholdRatio * space_allocated_mb > space_used_mb -- allocated space is more than N times used space
AND AND
DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical') DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical') -- not relevant for remote storage SLOs
; ;
-- Recent CPU throttling -- Recent CPU throttling
@ -853,9 +875,9 @@ INSERT INTO @DetectedTip (tip_id, details)
SELECT 1190 AS tip_id, SELECT 1190 AS tip_id,
CONCAT( CONCAT(
'In the last hour, there were ', count_high_log_write_intervals, 'In the last hour, there were ', count_high_log_write_intervals,
' interval(s) with log rate staying above ', @HighLogRateThresholdPercent, ' interval(s) with transaction log IO staying above ', @HighLogRateThresholdPercent,
'%. The longest such interval lasted ', FORMAT(top_log_rate_duration_seconds, '#,0'), '% of the limit for the service objective. The longest such interval lasted ', FORMAT(top_log_rate_duration_seconds, '#,0'),
' seconds, and the highest log rate was ', FORMAT(top_log_write_percent, '#,0.00'), ' seconds, and the maximum log IO was ', FORMAT(top_log_write_percent, '#,0.00'),
'%.' '%.'
) AS details ) AS details
FROM log_rate_top_stat FROM log_rate_top_stat