Added details to space tips
This commit is contained in:
Dimitri Furman
Родитель
105dd6afa6
Коммит
8e586d542e
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@ -2,7 +2,7 @@
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Returns a set of tips to improve database design, health, and performance in Azure SQL Database.
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For a detailed description and the latest version of the script, see https://aka.ms/sqldbtips
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v20210106.1
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v20210107.1
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*/
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-- Set to 1 to output tips as a JSON value
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@ -165,7 +165,7 @@ BEGIN TRY
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DECLARE @EngineEdition int = CAST(SERVERPROPERTY('EngineEdition') AS int);
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IF @EngineEdition NOT IN (5,8)
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THROW 50005, 'This script runs on Azure SQL Database and Azure SQL Managed Instance only.', 1;
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THROW 50005, 'This script is for Azure SQL Database and Azure SQL Managed Instance only.', 1;
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-- Bail out if current CPU utilization is very high, to avoid impacting workloads
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IF EXISTS (
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@ -184,7 +184,7 @@ IF EXISTS (
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rs.avg_instance_cpu_percent > 95
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)
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)
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THROW 50010, 'CPU utilization is too high. Execute script at a later time.', 1;
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THROW 50010, 'CPU utilization is too high. Execute the script at a later time.', 1;
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IF DB_NAME() = 'master' AND @EngineEdition = 5
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THROW 50015, 'Execute this script in a user database, not in the ''master'' database.', 1;
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@ -205,9 +205,9 @@ VALUES
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(1080, 'Disable AUTO_SHRINK', 99, 'https://aka.ms/sqldbtips#1080'),
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(1100, 'Avoid GUID leading columns in btree indexes', 60, 'https://aka.ms/sqldbtips#1100'),
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(1110, 'Enable FLGP auto-tuning', 95, 'https://aka.ms/sqldbtips#1110'),
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(1120, 'Used space is close to MAXSIZE', 80, 'https://aka.ms/sqldbtips#1120'),
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(1130, 'Allocated space is close to MAXSIZE', 60, 'https://aka.ms/sqldbtips#1130'),
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(1140, 'Allocated space is much larger than used space', 50, 'https://aka.ms/sqldbtips#1140'),
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(1120, 'Used data size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtips#1120'),
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(1130, 'Allocated data size is close to MAXSIZE', 60, 'https://aka.ms/sqldbtips#1130'),
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(1140, 'Allocated data size is much larger than used data size', 50, 'https://aka.ms/sqldbtips#1140'),
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(1150, 'Recent CPU throttling found', 90, 'https://aka.ms/sqldbtips#1150'),
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(1160, 'Recent out of memory errors found', 80, 'https://aka.ms/sqldbtips#1160'),
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(1165, 'Recent memory grant waits and timeouts found', 70, 'https://aka.ms/sqldbtips#1165'),
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@ -458,22 +458,33 @@ WHERE name = 'FORCE_LAST_GOOD_PLAN'
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;
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-- Used space close to maxsize
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INSERT INTO @DetectedTip (tip_id)
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SELECT 1120 AS tip_id
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WITH space_used AS
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(
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SELECT SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint) * 8 / 1024.) AS space_used_mb,
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CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 AS max_size_mb
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FROM sys.database_files
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WHERE @EngineEdition = 5
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AND
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type_desc = 'ROWS'
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AND
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CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) <> -1 -- not applicable to Hyperscale
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HAVING SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint) * 8 / 1024.)
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>
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@UsedToMaxsizeSpaceThresholdRatio * CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 -- used space > n% of db maxsize
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HAVING COUNT(1) > 0
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)
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INSERT INTO @DetectedTip (tip_id, details)
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SELECT 1120 AS tip_id,
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CONCAT(
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'Used data size (MB): ', FORMAT(space_used_mb, '#,0.00'),
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', maximum data size (MB): ', FORMAT(max_size_mb, '#,0.00')
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)
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FROM space_used
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WHERE space_used_mb > @UsedToMaxsizeSpaceThresholdRatio * max_size_mb -- used space > n% of db maxsize
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;
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-- Allocated space close to maxsize
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INSERT INTO @DetectedTip (tip_id)
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SELECT 1130 AS tip_id
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WITH space_allocated AS
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(
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SELECT SUM(CAST(size AS bigint) * 8 / 1024.) AS space_allocated_mb,
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CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 AS max_size_mb
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FROM sys.database_files
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WHERE @EngineEdition = 5
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AND
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@ -481,28 +492,39 @@ WHERE @EngineEdition = 5
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AND
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CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) <> -1 -- not applicable to Hyperscale
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AND
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DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical')
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HAVING SUM(CAST(size AS bigint) * 8 / 1024.)
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>
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@AllocatedToMaxsizeSpaceThresholdRatio * CAST(DATABASEPROPERTYEX(DB_NAME(), 'MaxSizeInBytes') AS bigint) / 1024. / 1024 -- allocated space > n% of db maxsize
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DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical') -- not relevant for remote storage SLOs
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HAVING COUNT(1) > 0
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)
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INSERT INTO @DetectedTip (tip_id, details)
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SELECT 1130 AS tip_id,
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CONCAT(
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'Allocated data size (MB): ', FORMAT(space_allocated_mb, '#,0.00'),
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', maximum data size (MB): ', FORMAT(max_size_mb, '#,0.00')
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)
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FROM space_allocated
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WHERE space_allocated_mb > @AllocatedToMaxsizeSpaceThresholdRatio * max_size_mb -- allocated space > n% of db maxsize
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;
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-- Allocated space >> used space
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WITH allocated_used_space AS
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(
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SELECT SUM(CAST(size AS bigint)) AS allocated_space,
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SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint)) AS used_space
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SELECT SUM(CAST(size AS bigint) * 8 / 1024.) AS space_allocated_mb,
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SUM(CAST(FILEPROPERTY(name, 'SpaceUsed') AS bigint)) / 1024. / 1024 AS space_used_mb
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FROM sys.database_files
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WHERE type_desc = 'ROWS'
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)
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INSERT INTO @DetectedTip (tip_id)
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SELECT 1140 AS tip_id
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INSERT INTO @DetectedTip (tip_id, details)
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SELECT 1140 AS tip_id,
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CONCAT(
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'Used data size (MB): ', FORMAT(space_used_mb, '#,0.00'),
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', allocated data size (MB): ', FORMAT(space_allocated_mb, '#,0.00')
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)
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FROM allocated_used_space
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WHERE used_space * 8 / 1024. > @UsedToAllocatedSpaceDbMinSizeMB -- not relevant for small databases
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WHERE space_used_mb * 8 / 1024. > @UsedToAllocatedSpaceDbMinSizeMB -- not relevant for small databases
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AND
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@UsedToAllocatedSpaceThresholdRatio * allocated_space > used_space -- allocated space is more than N times used space
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@UsedToAllocatedSpaceThresholdRatio * space_allocated_mb > space_used_mb -- allocated space is more than N times used space
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AND
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DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical')
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DATABASEPROPERTYEX(DB_NAME(), 'Edition') IN ('Premium','BusinessCritical') -- not relevant for remote storage SLOs
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;
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-- Recent CPU throttling
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@ -853,9 +875,9 @@ INSERT INTO @DetectedTip (tip_id, details)
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SELECT 1190 AS tip_id,
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CONCAT(
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'In the last hour, there were ', count_high_log_write_intervals,
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' interval(s) with log rate staying above ', @HighLogRateThresholdPercent,
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'%. The longest such interval lasted ', FORMAT(top_log_rate_duration_seconds, '#,0'),
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' seconds, and the highest log rate was ', FORMAT(top_log_write_percent, '#,0.00'),
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' interval(s) with transaction log IO staying above ', @HighLogRateThresholdPercent,
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'% of the limit for the service objective. The longest such interval lasted ', FORMAT(top_log_rate_duration_seconds, '#,0'),
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' seconds, and the maximum log IO was ', FORMAT(top_log_write_percent, '#,0.00'),
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'%.'
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) AS details
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FROM log_rate_top_stat
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