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Dimitri Furman 2021-01-10 16:27:48 -05:00
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sqldb-tips/get-sqldb-tips.sql
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@ -2,7 +2,7 @@
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
v20210108.1
v20210110.1
*/
-- Set to 1 to output tips as a JSON value
@ -201,48 +201,48 @@ IF DB_NAME() = 'master' AND @EngineEdition = 5
-- Define all tips
INSERT INTO @TipDefinition (tip_id, tip_name, confidence_percent, tip_url)
VALUES
(1000, 'Reduce MAXDOP on all replicas', 90, 'https://aka.ms/sqldbtipswiki#1000'),
(1010, 'Reduce MAXDOP on primary', 90, 'https://aka.ms/sqldbtipswiki#1010'),
(1020, 'Reduce MAXDOP on secondaries', 90, 'https://aka.ms/sqldbtipswiki#1020'),
(1030, 'Use the latest database compatibility level', 70, 'https://aka.ms/sqldbtipswiki#1030'),
(1040, 'Enable auto-create statistics', 95, 'https://aka.ms/sqldbtipswiki#1040'),
(1050, 'Enable auto-update statistics', 95, 'https://aka.ms/sqldbtipswiki#1050'),
(1060, 'Enable RCSI', 80, 'https://aka.ms/sqldbtipswiki#1060'),
(1070, 'Enable Query Store', 90, 'https://aka.ms/sqldbtipswiki#1070'),
(1071, 'Change Query Store operation mode to read-write', 90, 'https://aka.ms/sqldbtipswiki#1071'),
(1072, 'Change Query Store capture mode from NONE to AUTO/ALL', 90, 'https://aka.ms/sqldbtipswiki#1072'),
(1080, 'Disable AUTO_SHRINK', 99, 'https://aka.ms/sqldbtipswiki#1080'),
(1100, 'Avoid GUID leading columns in btree indexes', 60, 'https://aka.ms/sqldbtipswiki#1100'),
(1110, 'Enable FLGP auto-tuning', 95, 'https://aka.ms/sqldbtipswiki#1110'),
(1120, 'Used data size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtipswiki#1120'),
(1130, 'Allocated data size is close to MAXSIZE', 60, 'https://aka.ms/sqldbtipswiki#1130'),
(1140, 'Allocated data size is much larger than used data size', 50, 'https://aka.ms/sqldbtipswiki#1140'),
(1150, 'Recent CPU throttling found', 90, 'https://aka.ms/sqldbtipswiki#1150'),
(1160, 'Recent out of memory errors found', 80, 'https://aka.ms/sqldbtipswiki#1160'),
(1165, 'Recent memory grant waits and timeouts found', 70, 'https://aka.ms/sqldbtipswiki#1165'),
(1170, 'Nonclustered indexes with low reads found', 60, 'https://aka.ms/sqldbtipswiki#1170'),
(1180, 'ROW or PAGE compression opportunities may exist', 65, 'https://aka.ms/sqldbtipswiki#1180'),
(1190, 'Transaction log IO is close to limit', 70, 'https://aka.ms/sqldbtipswiki#1190'),
(1200, 'Plan cache is bloated by single-use plans', 90, 'https://aka.ms/sqldbtipswiki#1200'),
(1210, 'Missing indexes may be impacting performance', 70, 'https://aka.ms/sqldbtipswiki#1210'),
(1220, 'Redo queue or a secondary replica is large', 60, 'https://aka.ms/sqldbtipswiki#1220'),
(1230, 'Data IOPS are close to workload group limit', 70, 'https://aka.ms/sqldbtipswiki#1230'),
(1240, 'Workload group IO governance impact is significant', 40, 'https://aka.ms/sqldbtipswiki#1240'),
(1250, 'Data IOPS are close to resource pool limit', 70, 'https://aka.ms/sqldbtipswiki#1250'),
(1260, 'Resouce pool IO governance impact is significant', 40, 'https://aka.ms/sqldbtipswiki#1260'),
(1270, 'Persistent Version Store size is large', 70, 'https://aka.ms/sqldbtipswiki#1270'),
(1280, 'Paused resumable index operations found', 90, 'https://aka.ms/sqldbtipswiki#1280'),
(1290, 'Clustered columnstore candidates found', 50, 'https://aka.ms/sqldbtipswiki#1290'),
(1300, 'Geo-replication state may be unhealthy', 70, 'https://aka.ms/sqldbtipswiki#1300'),
(1310, 'Last partitions are not empty', 80, 'https://aka.ms/sqldbtipswiki#1310'),
(1320, 'Top queries should be investigated and tuned', 90, 'https://aka.ms/sqldbtipswiki#1320'),
(1330, 'Tempdb data allocated size is close to MAXSIZE', 70, 'https://aka.ms/sqldbtipswiki#1330'),
(1340, 'Tempdb data used size is close to MAXSIZE', 95, 'https://aka.ms/sqldbtipswiki#1340'),
(1350, 'Tempdb log allocated size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtipswiki#1350'),
(1360, 'Worker utilization is close to workload group limit', 80, 'https://aka.ms/sqldbtipswiki#1360'),
(1370, 'Worker utilization is close to resource pool limit', 80, 'https://aka.ms/sqldbtipswiki#1370'),
(1380, 'Notable network connectivity events found', 30, 'https://aka.ms/sqldbtipswiki#1380'),
(1390, 'Instance CPU utilization is high', 60, 'https://aka.ms/sqldbtipswiki#1390')
(1000, 'Reduce MAXDOP on all replicas', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1000'),
(1010, 'Reduce MAXDOP on primary', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1010'),
(1020, 'Reduce MAXDOP on secondaries', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1020'),
(1030, 'Use the latest database compatibility level', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1030'),
(1040, 'Enable auto-create statistics', 95, 'https://aka.ms/sqldbtipswiki#tip_id-1040'),
(1050, 'Enable auto-update statistics', 95, 'https://aka.ms/sqldbtipswiki#tip_id-1050'),
(1060, 'Enable RCSI', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1060'),
(1070, 'Enable Query Store', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1070'),
(1071, 'Change Query Store operation mode to read-write', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1071'),
(1072, 'Change Query Store capture mode from NONE to AUTO/ALL', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1072'),
(1080, 'Disable AUTO_SHRINK', 99, 'https://aka.ms/sqldbtipswiki#tip_id-1080'),
(1100, 'Avoid GUID leading columns in btree indexes', 60, 'https://aka.ms/sqldbtipswiki#tip_id-1100'),
(1110, 'Enable FLGP auto-tuning', 95, 'https://aka.ms/sqldbtipswiki#tip_id-1110'),
(1120, 'Used data size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1120'),
(1130, 'Allocated data size is close to MAXSIZE', 60, 'https://aka.ms/sqldbtipswiki#tip_id-1130'),
(1140, 'Allocated data size is much larger than used data size', 50, 'https://aka.ms/sqldbtipswiki#tip_id-1140'),
(1150, 'Recent CPU throttling found', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1150'),
(1160, 'Recent out of memory errors found', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1160'),
(1165, 'Recent memory grant waits and timeouts found', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1165'),
(1170, 'Nonclustered indexes with low reads found', 60, 'https://aka.ms/sqldbtipswiki#tip_id-1170'),
(1180, 'ROW or PAGE compression opportunities may exist', 65, 'https://aka.ms/sqldbtipswiki#tip_id-1180'),
(1190, 'Transaction log IO is close to limit', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1190'),
(1200, 'Plan cache is bloated by single-use plans', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1200'),
(1210, 'Missing indexes may be impacting performance', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1210'),
(1220, 'Redo queue or a secondary replica is large', 60, 'https://aka.ms/sqldbtipswiki#tip_id-1220'),
(1230, 'Data IOPS are close to workload group limit', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1230'),
(1240, 'Workload group IO governance impact is significant', 40, 'https://aka.ms/sqldbtipswiki#tip_id-1240'),
(1250, 'Data IOPS are close to resource pool limit', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1250'),
(1260, 'Resouce pool IO governance impact is significant', 40, 'https://aka.ms/sqldbtipswiki#tip_id-1260'),
(1270, 'Persistent Version Store size is large', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1270'),
(1280, 'Paused resumable index operations found', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1280'),
(1290, 'Clustered columnstore candidates found', 50, 'https://aka.ms/sqldbtipswiki#tip_id-1290'),
(1300, 'Geo-replication state may be unhealthy', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1300'),
(1310, 'Last partitions are not empty', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1310'),
(1320, 'Top queries should be investigated and tuned', 90, 'https://aka.ms/sqldbtipswiki#tip_id-1320'),
(1330, 'Tempdb data allocated size is close to MAXSIZE', 70, 'https://aka.ms/sqldbtipswiki#tip_id-1330'),
(1340, 'Tempdb data used size is close to MAXSIZE', 95, 'https://aka.ms/sqldbtipswiki#tip_id-1340'),
(1350, 'Tempdb log allocated size is close to MAXSIZE', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1350'),
(1360, 'Worker utilization is close to workload group limit', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1360'),
(1370, 'Worker utilization is close to resource pool limit', 80, 'https://aka.ms/sqldbtipswiki#tip_id-1370'),
(1380, 'Notable network connectivity events found', 30, 'https://aka.ms/sqldbtipswiki#tip_id-1380'),
(1390, 'Instance CPU utilization is high', 60, 'https://aka.ms/sqldbtipswiki#tip_id-1390')
;
-- MAXDOP
@ -1881,6 +1881,7 @@ SELECT q.query_hash,
SUM(rs.avg_cpu_time * rs.count_executions) AS total_cpu_time,
SUM(rs.avg_duration * rs.count_executions) AS total_duration,
SUM(rs.avg_logical_io_reads * rs.count_executions) AS total_logical_io_reads,
SUM(rs.avg_physical_io_reads * rs.count_executions) AS total_physical_io_reads,
SUM(rs.avg_query_max_used_memory * rs.count_executions) AS total_query_max_used_memory,
SUM(rs.avg_log_bytes_used * rs.count_executions) AS total_log_bytes_used,
SUM(rs.avg_tempdb_space_used * rs.count_executions) AS total_tempdb_space_used,
@ -1915,6 +1916,7 @@ SELECT rs.query_hash,
ROW_NUMBER() OVER (ORDER BY rs.total_cpu_time DESC) AS cpu_time_rank,
ROW_NUMBER() OVER (ORDER BY rs.total_duration DESC) AS duration_rank,
ROW_NUMBER() OVER (ORDER BY rs.total_logical_io_reads DESC) AS logical_io_reads_rank,
ROW_NUMBER() OVER (ORDER BY rs.total_physical_io_reads DESC) AS physical_io_reads_rank,
ROW_NUMBER() OVER (ORDER BY rs.count_executions DESC) AS executions_rank,
ROW_NUMBER() OVER (ORDER BY rs.total_query_max_used_memory DESC) AS total_query_max_used_memory_rank,
ROW_NUMBER() OVER (ORDER BY rs.total_log_bytes_used DESC) AS total_log_bytes_used_rank,
@ -1925,6 +1927,7 @@ SELECT rs.query_hash,
IIF(rs.total_cpu_time * 1. / NULLIF(LEAD(rs.total_cpu_time) OVER (ORDER BY rs.total_cpu_time), 0) < 0.5, 1, 0) AS top_cpu_cutoff_indicator,
IIF(rs.total_duration * 1. / NULLIF(LEAD(rs.total_duration) OVER (ORDER BY rs.total_duration), 0) < 0.5, 1, 0) AS top_duration_cutoff_indicator,
IIF(rs.total_logical_io_reads * 1. / NULLIF(LEAD(rs.total_logical_io_reads) OVER (ORDER BY rs.total_logical_io_reads), 0) < 0.5, 1, 0) AS top_logical_io_reads_cutoff_indicator,
IIF(rs.total_physical_io_reads * 1. / NULLIF(LEAD(rs.total_physical_io_reads) OVER (ORDER BY rs.total_physical_io_reads), 0) < 0.5, 1, 0) AS top_physical_io_reads_cutoff_indicator,
IIF(rs.count_executions * 1. / NULLIF(LEAD(rs.count_executions) OVER (ORDER BY rs.count_executions), 0) < 0.5, 1, 0) AS top_executions_cutoff_indicator,
IIF(rs.total_query_max_used_memory * 1. / NULLIF(LEAD(rs.total_query_max_used_memory) OVER (ORDER BY rs.total_query_max_used_memory), 0) < 0.5, 1, 0) AS top_memory_cutoff_indicator,
IIF(rs.total_log_bytes_used * 1. / NULLIF(LEAD(rs.total_log_bytes_used) OVER (ORDER BY rs.total_log_bytes_used), 0) < 0.5, 1, 0) AS top_log_bytes_cutoff_indicator,
@ -1942,6 +1945,7 @@ SELECT *,
SUM(top_cpu_cutoff_indicator) OVER (ORDER BY cpu_time_rank ROWS UNBOUNDED PRECEDING) AS top_cpu_indicator,
SUM(top_duration_cutoff_indicator) OVER (ORDER BY duration_rank ROWS UNBOUNDED PRECEDING) AS top_duration_indicator,
SUM(top_logical_io_reads_cutoff_indicator) OVER (ORDER BY logical_io_reads_rank ROWS UNBOUNDED PRECEDING) AS top_logical_io_indicator,
SUM(top_physical_io_reads_cutoff_indicator) OVER (ORDER BY physical_io_reads_rank ROWS UNBOUNDED PRECEDING) AS top_physical_io_indicator,
SUM(top_executions_cutoff_indicator) OVER (ORDER BY executions_rank ROWS UNBOUNDED PRECEDING) AS top_executions_indicator,
SUM(top_memory_cutoff_indicator) OVER (ORDER BY total_query_max_used_memory_rank ROWS UNBOUNDED PRECEDING) AS top_memory_indicator,
SUM(top_log_bytes_cutoff_indicator) OVER (ORDER BY total_log_bytes_used_rank ROWS UNBOUNDED PRECEDING) AS top_log_bytes_indicator,
@ -1963,6 +1967,7 @@ SELECT query_hash,
cpu_time_rank,
duration_rank,
logical_io_reads_rank,
physical_io_reads_rank,
executions_rank,
total_query_max_used_memory_rank,
total_log_bytes_used_rank,
@ -1979,6 +1984,8 @@ WHERE (
OR
top_logical_io_indicator = 0
OR
top_physical_io_indicator = 0
OR
top_memory_indicator = 0
OR
top_log_bytes_indicator = 0
@ -1997,6 +2004,8 @@ WHERE (
OR
logical_io_reads_rank <= @QueryStoreTopQueryCount
OR
physical_io_reads_rank <= @QueryStoreTopQueryCount
OR
total_query_max_used_memory_rank <= @QueryStoreTopQueryCount
OR
total_log_bytes_used_rank <= @QueryStoreTopQueryCount
@ -2019,6 +2028,7 @@ SELECT 1320 AS tip_id,
', duration rank: ', CAST(duration_rank AS varchar(11)),
', executions rank: ', CAST(executions_rank AS varchar(11)),
', logical IO reads rank: ', CAST(logical_io_reads_rank AS varchar(11)),
', physical IO reads rank: ', CAST(physical_io_reads_rank AS varchar(11)),
', max used memory rank: ', CAST(total_query_max_used_memory_rank AS varchar(11)),
', log bytes used rank: ', CAST(total_log_bytes_used_rank AS varchar(11)),
', tempdb used rank: ', CAST(total_tempdb_space_used_rank AS varchar(11)),