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2022sql
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2022sql
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-- SQL Server 2022 Diagnostic Information Queries
-- Glenn Berry
-- Last Modified: March 6, 2024
-- https://glennsqlperformance.com/
-- https://sqlserverperformance.wordpress.com/
-- YouTube: https://bit.ly/2PkoAM1
-- Twitter: GlennAlanBerry
-- Diagnostic Queries are available here
-- https://glennsqlperformance.com/resources/
-- YouTube video demonstrating these queries
-- https://bit.ly/3aXNDzJ
-- Please make sure you are using the correct version of these diagnostic queries for your version of SQL Server
-- If you like PowerShell, there is a very useful community solution for running these queries in an automated fashion
-- https://dbatools.io/
-- Invoke-DbaDiagnosticQuery
-- https://docs.dbatools.io/Invoke-DbaDiagnosticQuery
--******************************************************************************
--* Copyright (C) 2024 Glenn Berry
--* All rights reserved.
--*
--*
--* You may alter this code for your own *non-commercial* purposes. You may
--* republish altered code as long as you include this copyright and give due credit.
--*
--*
--* THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF
--* ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
--* TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
--* PARTICULAR PURPOSE.
--*
--******************************************************************************
-- Check the major product version to see if it is SQL Server 2022 CTP 2 or greater
IF NOT EXISTS (SELECT * WHERE CONVERT(varchar(128), SERVERPROPERTY('ProductMajorVersion')) = '16')
BEGIN
DECLARE @ProductVersion varchar(128) = CONVERT(varchar(128), SERVERPROPERTY('ProductVersion'));
RAISERROR ('Script does not match the ProductVersion [%s] of this instance. Many of these queries may not work on this version.' , 18 , 16 , @ProductVersion);
END
ELSE
PRINT N'You have the correct major version of SQL Server for this diagnostic information script';
-- Instance level queries *******************************
-- SQL and OS Version information for current instance (Query 1) (Version Info)
SELECT @@SERVERNAME AS [Server Name], @@VERSION AS [SQL Server and OS Version Info];
------
-- SQL Server 2022 Builds
-- Build Description Release Date URL to KB Article
-- 16.0.600.9 CTP 2.0 5/20/2022
-- 16.0.700.4 CTP 2.1 7/27/2022
-- 16.0.900.6 RC0 8/23/2022
-- 16.0.950.9 RC1 9/22/2022
-- 16.0.1000.6 RTM 11/16/2022
-- 16.0.1050.5 RTM GDR 2/14/2023 https://support.microsoft.com/en-us/topic/kb5021522-description-of-the-security-update-for-sql-server-2022-gdr-february-14-2023-7a5a84ed-e99c-4537-b064-fa4499549c8e
-- 16.0.4003.1 CU1 2/16/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate1
-- 16.0.4015.1 CU2 3/15/2023 https://learn.microsoft.com/en-US/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate2
-- 16.0.4025.1 CU3 4/13/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate3
-- 16.0.4035.4 CU4 5/11/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate4
-- 16.0.4045.3 CU5 6/15/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate5
-- 16.0.4055.4 CU6 7/13/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate6
-- 16.0.4065.3 CU7 8/10/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate7
-- 16.0.4075.1 CU8 9/14/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate8
-- 16.0.4080.1 CU8 + GDR 10/10/2023 https://support.microsoft.com/en-us/topic/kb5029503-description-of-the-security-update-for-sql-server-2022-cu8-october-10-2023-c9c267e2-adb6-47f1-b7e9-d99d3c9fb081
-- 16.0.4085.2 CU9 10/12/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate9
-- 16.0.4095.4 CU10 11/16/2023 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate10
-- 16.0.4100.1 CU10 + GDR 1/9/2024 https://support.microsoft.com/en-us/topic/kb5033592-description-of-the-security-update-for-sql-server-2022-cu10-january-9-2024-0d807f8e-fa6a-4d42-88d3-71b101e71d18
-- 16.0.4105.2 CU11 1/11/2024 https://learn.microsoft.com/en-us/troubleshoot/sql/releases/sqlserver-2022/cumulativeupdate11
-- What's new in SQL Server 2022 (16.x)
-- https://bit.ly/3MJEjR1
-- How to determine the version, edition and update level of SQL Server and its components
-- https://bit.ly/2oAjKgW
-- Announcing the Modern Servicing Model for SQL Server
-- https://bit.ly/2KtJ8SS
-- Update Center for Microsoft SQL Server
-- https://bit.ly/2pZptuQ
-- Download SQL Server Management Studio (SSMS)
-- https://bit.ly/1OcupT9
-- Download and install Azure Data Studio
-- https://bit.ly/2vgke1A
-- SQL Server 2022 Configuration Manager is SQLServerManager16.msc
-- SQL Server troubleshooting (Microsoft documentation resources)
-- http://bit.ly/2YY0pb1
-- Get socket, physical core and logical core count from the SQL Server Error log. (Query 2) (Core Counts)
-- This query might take a few seconds depending on the size of your error log
EXEC sys.xp_readerrorlog 0, 1, N'detected', N'socket';
------
-- This can help you determine the exact core counts used by SQL Server and whether HT is enabled or not
-- It can also help you confirm your SQL Server licensing model
-- Be on the lookout for this message "using 40 logical processors based on SQL Server licensing"
-- (when you have more than 40 logical cores) which means grandfathered Server/CAL licensing
-- This query will return no results if your error log has been recycled since the instance was last started
-- Get selected server properties (Query 3) (Server Properties)
SELECT SERVERPROPERTY('MachineName') AS [MachineName],
SERVERPROPERTY('ServerName') AS [ServerName],
SERVERPROPERTY('InstanceName') AS [Instance],
SERVERPROPERTY('IsClustered') AS [IsClustered],
SERVERPROPERTY('ComputerNamePhysicalNetBIOS') AS [ComputerNamePhysicalNetBIOS],
SERVERPROPERTY('Edition') AS [Edition],
SERVERPROPERTY('ProductLevel') AS [ProductLevel], -- What servicing branch (RTM/SP/CU)
SERVERPROPERTY('ProductUpdateLevel') AS [ProductUpdateLevel], -- Within a servicing branch, what CU# is applied
SERVERPROPERTY('ProductVersion') AS [ProductVersion],
SERVERPROPERTY('ProductMajorVersion') AS [ProductMajorVersion],
SERVERPROPERTY('ProductMinorVersion') AS [ProductMinorVersion],
SERVERPROPERTY('ProductBuild') AS [ProductBuild],
SERVERPROPERTY('ProductBuildType') AS [ProductBuildType], -- Is this a GDR or OD hotfix (NULL if on a CU build)
SERVERPROPERTY('ProductUpdateReference') AS [ProductUpdateReference], -- KB article number that is applicable for this build
SERVERPROPERTY('ProcessID') AS [ProcessID],
SERVERPROPERTY('Collation') AS [Collation],
SERVERPROPERTY('IsFullTextInstalled') AS [IsFullTextInstalled],
SERVERPROPERTY('IsIntegratedSecurityOnly') AS [IsIntegratedSecurityOnly],
SERVERPROPERTY('FilestreamConfiguredLevel') AS [FilestreamConfiguredLevel],
SERVERPROPERTY('IsHadrEnabled') AS [IsHadrEnabled],
SERVERPROPERTY('HadrManagerStatus') AS [HadrManagerStatus],
SERVERPROPERTY('InstanceDefaultDataPath') AS [InstanceDefaultDataPath],
SERVERPROPERTY('InstanceDefaultLogPath') AS [InstanceDefaultLogPath],
SERVERPROPERTY('InstanceDefaultBackupPath') AS [InstanceDefaultBackupPath],
SERVERPROPERTY('ErrorLogFileName') AS [ErrorLogFileName],
SERVERPROPERTY('BuildClrVersion') AS [Build CLR Version],
SERVERPROPERTY('IsXTPSupported') AS [IsXTPSupported],
SERVERPROPERTY('IsPolybaseInstalled') AS [IsPolybaseInstalled],
SERVERPROPERTY('IsAdvancedAnalyticsInstalled') AS [IsRServicesInstalled],
SERVERPROPERTY('IsTempdbMetadataMemoryOptimized') AS [IsTempdbMetadataMemoryOptimized],
SERVERPROPERTY('IsServerSuspendedForSnapshotBackup') AS [IsServerSuspendedForSnapshotBackup],
SERVERPROPERTY('SuspendedDatabaseCount') AS [SuspendedDatabaseCount];
------
-- This gives you a lot of useful information about your instance of SQL Server,
-- such as the ProcessID for SQL Server and your collation
-- Note: Some columns will be NULL on older SQL Server builds
-- SERVERPROPERTY('IsServerSuspendedForSnapshotBackup') is a new option for SQL Server 2022
-- SERVERPROPERTY('SuspendedDatabaseCount') is a new option for SQL Server 2022
-- SERVERPROPERTY (Transact-SQL)
-- https://bit.ly/2eeaXeI
-- Get instance-level configuration values for instance (Query 4) (Configuration Values)
SELECT name, value, value_in_use, minimum, maximum, [description], is_dynamic, is_advanced
FROM sys.configurations WITH (NOLOCK)
ORDER BY name OPTION (RECOMPILE);
------
-- Focus on these settings:
-- automatic soft-NUMA disabled (should be 0 in most cases)
-- backup checksum default (should be 1)
-- backup compression algorithm
-- backup compression default (should be 1 in most cases)
-- clr enabled (only enable if it is needed)
-- cost threshold for parallelism (depends on your workload)
-- lightweight pooling (should be zero)
-- max degree of parallelism (depends on your workload and hardware)
-- max server memory (MB) (set to an appropriate value, not the default)
-- optimize for ad hoc workloads (should be 1)
-- priority boost (should be zero)
-- remote admin connections (should be 1)
-- tempdb metadata memory-optimized (0 by default, some workloads may benefit by enabling)
-- sys.configurations (Transact-SQL)
-- https://bit.ly/2HsyDZI
-- New in SQL Server 2022 *********************************************************************************************************
-- ADR Cleaner Thread Count Max number of threads ADR cleaner can assign
-- backup compression algorithm Configure backup compression algorithm
-- Data processed daily limit in TB SQL On-demand data processed daily limit in TB
-- Data processed monthly limit in TB SQL On-demand data processed monthly limit in TB
-- Data processed weekly limit in TB SQL On-demand data processed weekly limit in TB
-- hardware offload config Offload processing to specialized hardware
-- openrowset auto_create_statistics Enable or disable auto create statistics for openrowset sources.
-- suppress recovery model errors Return warning instead of error for unsupported ALTER DATABASE SET RECOVERY command
-- Returns a list of all global trace flags that are enabled (Query 5) (Global Trace Flags)
DBCC TRACESTATUS (-1);
------
-- If no global trace flags are enabled, no results will be returned.
-- It is very useful to know what global trace flags are currently enabled as part of the diagnostic process.
-- Common trace flags that should be enabled in most cases
-- TF 3226 - Suppresses logging of successful database backup messages to the SQL Server Error Log
-- https://bit.ly/38zDNAK
-- TF 6534 - Enables use of native code to improve performance with spatial data. This is a startup trace flag only
-- https://bit.ly/2HrQUpU
-- TF 7745 - Prevents Query Store data from being written to disk in case of a failover or shutdown command
-- https://bit.ly/2GU69Km
-- DBCC TRACEON - Trace Flags (Transact-SQL)
-- https://bit.ly/2FuSvPg
-- SQL Server Process Address space info (Query 6) (Process Memory)
-- (shows whether locked pages is enabled, among other things)
SELECT physical_memory_in_use_kb/1024 AS [SQL Server Memory Usage (MB)],
locked_page_allocations_kb/1024 AS [SQL Server Locked Pages Allocation (MB)],
large_page_allocations_kb/1024 AS [SQL Server Large Pages Allocation (MB)],
page_fault_count, memory_utilization_percentage, available_commit_limit_kb,
process_physical_memory_low, process_virtual_memory_low
FROM sys.dm_os_process_memory WITH (NOLOCK) OPTION (RECOMPILE);
------
-- You want to see 0 for process_physical_memory_low
-- You want to see 0 for process_virtual_memory_low
-- This indicates that you are not under internal memory pressure
-- If locked_page_allocations_kb > 0, then LPIM is enabled
-- sys.dm_os_process_memory (Transact-SQL)
-- https://bit.ly/3iUgQgC
-- How to enable the "locked pages" feature in SQL Server 2012
-- https://bit.ly/2F5UjOA
-- Memory Management Architecture Guide
-- https://bit.ly/2JKkadC
-- SQL Server Services information (Query 7) (SQL Server Services Info)
SELECT servicename, process_id, startup_type_desc, status_desc,
last_startup_time, service_account, is_clustered, cluster_nodename, [filename],
instant_file_initialization_enabled
FROM sys.dm_server_services WITH (NOLOCK) OPTION (RECOMPILE);
------
-- Tells you the account being used for the SQL Server Service and the SQL Agent Service
-- Shows the process_id, when they were last started, and their current status
-- Also shows whether you are running on a failover cluster instance, and what node you are running on
-- Also shows whether IFI is enabled
-- sys.dm_server_services (Transact-SQL)
-- https://bit.ly/2oKa1Un
-- Last backup information by database (Query 8) (Last Backup By Database)
SELECT ISNULL(d.[name], bs.[database_name]) AS [Database], d.recovery_model_desc AS [Recovery Model],
d.log_reuse_wait_desc AS [Log Reuse Wait Desc],
CONVERT(DECIMAL(18,2), ds.cntr_value/1024.0) AS [Total Data File Size on Disk (MB)],
CONVERT(DECIMAL(18,2), ls.cntr_value/1024.0) AS [Total Log File Size on Disk (MB)],
CAST(CAST(lu.cntr_value AS FLOAT) / CAST(ls.cntr_value AS FLOAT) AS DECIMAL(18,2)) * 100 AS [Log Used %],
MAX(CASE WHEN bs.[type] = 'D' THEN bs.backup_finish_date ELSE NULL END) AS [Last Full Backup],
MAX(CASE WHEN bs.[type] = 'D' THEN CONVERT (BIGINT, bs.compressed_backup_size / 1048576 ) ELSE NULL END) AS [Last Full Compressed Backup Size (MB)],
MAX(CASE WHEN bs.[type] = 'D' THEN CONVERT (DECIMAL(18,2), bs.backup_size /bs.compressed_backup_size ) ELSE NULL END) AS [Backup Compression Ratio],
MAX(CASE WHEN bs.[type] = 'D' THEN bs.compression_algorithm ELSE NULL END) AS [Last Full Backup Compression Algorithm],
MAX(CASE WHEN bs.[type] = 'I' THEN bs.backup_finish_date ELSE NULL END) AS [Last Differential Backup],
MAX(CASE WHEN bs.[type] = 'L' THEN bs.backup_finish_date ELSE NULL END) AS [Last Log Backup],
MAX(CASE WHEN bs.[type] = 'L' THEN bs.last_valid_restore_time ELSE NULL END) AS [Last Valid Restore Time],
DATABASEPROPERTYEX ((d.[name]), 'LastGoodCheckDbTime') AS [Last Good CheckDB]
FROM sys.databases AS d WITH (NOLOCK)
INNER JOIN sys.master_files as mf WITH (NOLOCK)
ON d.database_id = mf.database_id
LEFT OUTER JOIN msdb.dbo.backupset AS bs WITH (NOLOCK)
ON bs.[database_name] = d.[name]
AND bs.backup_finish_date > GETDATE()- 30
LEFT OUTER JOIN sys.dm_os_performance_counters AS lu WITH (NOLOCK)
ON d.name = lu.instance_name
LEFT OUTER JOIN sys.dm_os_performance_counters AS ls WITH (NOLOCK)
ON d.name = ls.instance_name
INNER JOIN sys.dm_os_performance_counters AS ds WITH (NOLOCK)
ON d.name = ds.instance_name
WHERE d.name <> N'tempdb'
AND lu.counter_name LIKE N'Log File(s) Used Size (KB)%'
AND ls.counter_name LIKE N'Log File(s) Size (KB)%'
AND ds.counter_name LIKE N'Data File(s) Size (KB)%'
AND ls.cntr_value > 0
GROUP BY ISNULL(d.[name], bs.[database_name]), d.recovery_model_desc, d.log_reuse_wait_desc, d.[name],
CONVERT(DECIMAL(18,2), ds.cntr_value/1024.0),
CONVERT(DECIMAL(18,2), ls.cntr_value/1024.0),
CAST(CAST(lu.cntr_value AS FLOAT) / CAST(ls.cntr_value AS FLOAT) AS DECIMAL(18,2)) * 100
ORDER BY d.recovery_model_desc, d.[name] OPTION (RECOMPILE);
------
-- This helps you spot runaway transaction logs and other issues with your backup schedule
-- Get detailed accelerator status information (Query 9) (Accelerator Status)
SELECT accelerator, accelerator_desc, config, config_in_use , mode, mode_desc,
mode_reason, mode_reason_desc, accelerator_hardware_detected,
accelerator_library_version, accelerator_driver_version
FROM sys.dm_server_accelerator_status WITH (NOLOCK) OPTION (RECOMPILE);
------
-- This shows which accelerators are present and their detailed status information
-- sys.dm_server_accelerator_status (Transact-SQL)
-- https://bit.ly/3B6Fczw
-- How to Enable Intel QAT Backup Compression in SQL Server 2022
-- https://bit.ly/3Cudwpy
-- Get SQL Server Agent jobs and Category information (Query 10) (SQL Server Agent Jobs)
SELECT sj.name AS [Job Name], sj.[description] AS [Job Description],
sc.name AS [CategoryName], SUSER_SNAME(sj.owner_sid) AS [Job Owner],
sj.date_created AS [Date Created], sj.[enabled] AS [Job Enabled],
sj.notify_email_operator_id, sj.notify_level_email, h.run_status,
RIGHT(STUFF(STUFF(REPLACE(STR(h.run_duration, 7, 0), ' ', '0'), 4, 0, ':'), 7, 0, ':'),8) AS [Last Duration - HHMMSS],
CONVERT(DATETIME, RTRIM(h.run_date) + ' ' + STUFF(STUFF(REPLACE(STR(RTRIM(h.run_time),6,0),' ','0'),3,0,':'),6,0,':')) AS [Last Start Date]
FROM msdb.dbo.sysjobs AS sj WITH (NOLOCK)
LEFT OUTER JOIN
(SELECT job_id, instance_id = MAX(instance_id)
FROM msdb.dbo.sysjobhistory WITH (NOLOCK)
GROUP BY job_id) AS l
ON sj.job_id = l.job_id
LEFT OUTER JOIN msdb.dbo.syscategories AS sc WITH (NOLOCK)
ON sj.category_id = sc.category_id
LEFT OUTER JOIN msdb.dbo.sysjobhistory AS h WITH (NOLOCK)
ON h.job_id = l.job_id
AND h.instance_id = l.instance_id
ORDER BY CONVERT(INT, h.run_duration) DESC, [Last Start Date] DESC OPTION (RECOMPILE);
------
--run_status
-- Value Status of the job execution
-- 0 = Failed
-- 1 = Succeeded
-- 2 = Retry
-- 3 = Canceled
-- 4 = In Progress
-- Gives you some basic information about your SQL Server Agent jobs, who owns them and how they are configured
-- Look for Agent jobs that are not owned by sa
-- Look for jobs that have a notify_email_operator_id set to 0 (meaning no operator)
-- Look for jobs that have a notify_level_email set to 0 (meaning no e-mail is ever sent)
--
-- MSDN sysjobs documentation
-- https://bit.ly/2paDEOP
-- SQL Server Maintenance Solution (Ola Hallengren)
-- https://bit.ly/1pgchQu
-- You can use this script to add default schedules to the standard Ola Hallengren Maintenance Solution jobs
-- https://bit.ly/3ane0gN
-- Get SQL Server Agent Alert Information (Query 11) (SQL Server Agent Alerts)
SELECT name, event_source, message_id, severity, [enabled], has_notification,
delay_between_responses, occurrence_count, last_occurrence_date, last_occurrence_time
FROM msdb.dbo.sysalerts WITH (NOLOCK)
ORDER BY name OPTION (RECOMPILE);
------
-- Gives you some basic information about your SQL Server Agent Alerts
-- (which are different from SQL Server Agent jobs)
-- Read more about Agent Alerts here: https://bit.ly/2v5YR37
-- Host information (Query 12) (Host Info)
SELECT host_platform, host_distribution, host_release,
host_service_pack_level, host_sku, os_language_version,
host_architecture
FROM sys.dm_os_host_info WITH (NOLOCK) OPTION (RECOMPILE);
------
-- host_release codes (only valid for Windows)
-- 10.0 is either Windows 10, Windows Server 2016 or Windows Server 2019
-- 6.3 is either Windows 8.1 or Windows Server 2012 R2
-- 6.2 is either Windows 8 or Windows Server 2012
-- host_sku codes (only valid for Windows)
-- 4 is Enterprise Edition
-- 7 is Standard Server Edition
-- 8 is Datacenter Server Edition
-- 10 is Enterprise Server Edition
-- 48 is Professional Edition
-- 161 is Pro for Workstations
-- 1033 for os_language_version is US-English
-- SQL Server 2022 requires Windows Server 2016 or newer
-- Hardware and Software Requirements for Installing SQL Server
-- https://bit.ly/2y3ka5L
-- Using SQL Server in Windows 8 and later versions of Windows operating system
-- https://bit.ly/2F7Ax0P
-- SQL Server NUMA Node information (Query 13) (SQL Server NUMA Info)
SELECT osn.node_id, osn.node_state_desc, osn.memory_node_id, osn.processor_group, osn.cpu_count, osn.online_scheduler_count,
osn.idle_scheduler_count, osn.active_worker_count,
osmn.pages_kb/1024 AS [Committed Memory (MB)],
osmn.locked_page_allocations_kb/1024 AS [Locked Physical (MB)],
CONVERT(DECIMAL(18,2), osmn.foreign_committed_kb/1024.0) AS [Foreign Commited (MB)],
osmn.target_kb/1024 AS [Target Memory Goal (MB)],
osn.avg_load_balance, osn.resource_monitor_state
FROM sys.dm_os_nodes AS osn WITH (NOLOCK)
INNER JOIN sys.dm_os_memory_nodes AS osmn WITH (NOLOCK)
ON osn.memory_node_id = osmn.memory_node_id
WHERE osn.node_state_desc <> N'ONLINE DAC' OPTION (RECOMPILE);
------
-- Gives you some useful information about the composition and relative load on your NUMA nodes
-- You want to see an equal number of schedulers on each NUMA node
-- Watch out if SQL Server 2022 Standard Edition has been installed
-- on a physical or virtual machine with more than four sockets or more than 24 physical cores
-- sys.dm_os_nodes (Transact-SQL)
-- https://bit.ly/2pn5Mw8
-- How to Balance SQL Server Core Licenses Across NUMA Nodes
-- https://bit.ly/3i4TyVR
-- Good basic information about OS memory amounts and state (Query 14) (System Memory)
SELECT total_physical_memory_kb/1024 AS [Physical Memory (MB)],
available_physical_memory_kb/1024 AS [Available Memory (MB)],
total_page_file_kb/1024 AS [Page File Commit Limit (MB)],
total_page_file_kb/1024 - total_physical_memory_kb/1024 AS [Physical Page File Size (MB)],
available_page_file_kb/1024 AS [Available Page File (MB)],
system_cache_kb/1024 AS [System Cache (MB)],
system_memory_state_desc AS [System Memory State]
FROM sys.dm_os_sys_memory WITH (NOLOCK) OPTION (RECOMPILE);
------
-- You want to see "Available physical memory is high" for System Memory State
-- This indicates that you are not under external memory pressure
-- Possible System Memory State values:
-- Available physical memory is high
-- Physical memory usage is steady
-- Available physical memory is low
-- Available physical memory is running low
-- Physical memory state is transitioning
-- sys.dm_os_sys_memory (Transact-SQL)
-- https://bit.ly/2pcV0xq
-- You can skip the next two queries if you know you don't have a clustered instance
-- Get information about your cluster nodes and their status (Query 15) (Cluster Node Properties)
-- (if your database server is in a failover cluster)
SELECT NodeName, status_description, is_current_owner
FROM sys.dm_os_cluster_nodes WITH (NOLOCK) OPTION (RECOMPILE);
------
-- Knowing which node owns the cluster resources is critical
-- Especially when you are installing Windows or SQL Server updates
-- You will see no results if your instance is not clustered
-- Get information about any AlwaysOn AG cluster this instance is a part of (Query 16) (AlwaysOn AG Cluster)
SELECT cluster_name, quorum_type_desc, quorum_state_desc
FROM sys.dm_hadr_cluster WITH (NOLOCK) OPTION (RECOMPILE);
------
-- You will see no results if your instance is not using AlwaysOn AGs
-- Good overview of AG health and status (Query 17) (AG Status)
SELECT ag.name AS [AG Name], ar.replica_server_name, ar.availability_mode_desc, adc.[database_name],
drs.is_local, drs.is_primary_replica, drs.synchronization_state_desc, drs.is_commit_participant,
drs.synchronization_health_desc, drs.recovery_lsn, drs.truncation_lsn, drs.last_sent_lsn,
drs.last_sent_time, drs.last_received_lsn, drs.last_received_time, drs.last_hardened_lsn,
drs.last_hardened_time, drs.last_redone_lsn, drs.last_redone_time, drs.log_send_queue_size,
drs.log_send_rate, drs.redo_queue_size, drs.redo_rate, drs.filestream_send_rate,
drs.end_of_log_lsn, drs.last_commit_lsn, drs.last_commit_time, drs.database_state_desc
FROM sys.dm_hadr_database_replica_states AS drs WITH (NOLOCK)
INNER JOIN sys.availability_databases_cluster AS adc WITH (NOLOCK)
ON drs.group_id = adc.group_id
AND drs.group_database_id = adc.group_database_id
INNER JOIN sys.availability_groups AS ag WITH (NOLOCK)
ON ag.group_id = drs.group_id
INNER JOIN sys.availability_replicas AS ar WITH (NOLOCK)
ON drs.group_id = ar.group_id
AND drs.replica_id = ar.replica_id
ORDER BY ag.name, ar.replica_server_name, adc.[database_name] OPTION (RECOMPILE);
-- You will see no results if your instance is not using AlwaysOn AGs
-- SQL Server 2016 It Just Runs Faster: Always On Availability Groups Turbocharged
-- https://bit.ly/2dn1H6r
-- Hardware information from SQL Server 2022 (Query 18) (Hardware Info)
SELECT cpu_count AS [Logical CPU Count], scheduler_count,
(socket_count * cores_per_socket) AS [Physical Core Count],
socket_count AS [Socket Count], cores_per_socket, numa_node_count,
physical_memory_kb/1024 AS [Physical Memory (MB)],
max_workers_count AS [Max Workers Count],
affinity_type_desc AS [Affinity Type],
sqlserver_start_time AS [SQL Server Start Time],
DATEDIFF(hour, sqlserver_start_time, GETDATE()) AS [SQL Server Up Time (hrs)],
virtual_machine_type_desc AS [Virtual Machine Type],
softnuma_configuration_desc AS [Soft NUMA Configuration],
sql_memory_model_desc,
container_type_desc
FROM sys.dm_os_sys_info WITH (NOLOCK) OPTION (RECOMPILE);
------
-- Gives you some good basic hardware information about your database server
-- Note: virtual_machine_type_desc of HYPERVISOR does not automatically mean you are running SQL Server inside of a VM
-- It merely indicates that you have a hypervisor running on your host
-- sys.dm_os_sys_info (Transact-SQL)
-- https://bit.ly/2pczOYs
-- Soft NUMA configuration was a new column for SQL Server 2016
-- OFF = Soft-NUMA feature is OFF
-- ON = SQL Server automatically determines the NUMA node sizes for Soft-NUMA
-- MANUAL = Manually configured soft-NUMA
-- Configure SQL Server to Use Soft-NUMA (SQL Server)
-- https://bit.ly/2HTpKJt
-- sql_memory_model_desc values (Added in SQL Server 2016 SP1)
-- CONVENTIONAL
-- LOCK_PAGES
-- LARGE_PAGES
-- Get System Manufacturer and model number from SQL Server Error log (Query 19) (System Manufacturer)
EXEC sys.xp_readerrorlog 0, 1, N'Manufacturer';
------
-- This can help you determine the capabilities and capacities of your database server
-- Can also be used to confirm if you are running in a VM
-- This query might take a few seconds if you have not recycled your error log recently
-- This query will return no results if your error log has been recycled since the instance was started
-- Get BIOS date from Windows Registry (Query 20) (BIOS Date)
EXEC sys.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'HARDWARE\DESCRIPTION\System\BIOS', N'BiosReleaseDate';
------
-- Helps you understand whether the main system BIOS is up to date, and the possible age of the hardware
-- Not as useful for virtualization
-- Does not work on Linux
-- Get processor description from Windows Registry (Query 21) (Processor Description)
EXEC sys.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'HARDWARE\DESCRIPTION\System\CentralProcessor\0', N'ProcessorNameString';
------
-- Gives you the model number and rated clock speed of your processor(s)
-- Your processors may be running at less than the rated clock speed due
-- to the Windows Power Plan or hardware power management
-- Does not work on Linux
-- You can use CPU-Z to get your actual CPU core speed and a lot of other useful information
-- https://bit.ly/QhR6xF
-- You can learn more about processor selection for SQL Server by following this link
-- https://bit.ly/2F3aVlP
-- Get CPU vectorization level from SQL Server Error log (Query 22) (CPU Vectorization Level)
IF EXISTS (SELECT * WHERE CONVERT(VARCHAR(2), SERVERPROPERTY('ProductMajorVersion')) = '16')
BEGIN
-- Get CPU Description from Registry (only works on Windows)
DROP TABLE IF EXISTS #ProcessorDesc;
CREATE TABLE #ProcessorDesc
(RegValue NVARCHAR(50), RegKey NVARCHAR(100));
INSERT INTO #ProcessorDesc (RegValue, RegKey)
EXEC sys.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'HARDWARE\DESCRIPTION\System\CentralProcessor\0', N'ProcessorNameString';
DECLARE @ProcessorDesc NVARCHAR(100) = (SELECT RegKey FROM #ProcessorDesc);
-- Get CPU Vectorization Level from SQL Server Error Log
DROP TABLE IF EXISTS #CPUVectorizationLevel;
CREATE TABLE #CPUVectorizationLevel
(LogDateTime DATETIME, ProcessInfo NVARCHAR(12), LogText NVARCHAR(200));
INSERT INTO #CPUVectorizationLevel (LogDateTime, ProcessInfo, LogText)
EXEC sys.xp_readerrorlog 0, 1, N'CPU vectorization level';
DECLARE @CPUVectorizationLevel NVARCHAR(200) = (SELECT LogText FROM #CPUVectorizationLevel);
-- Get TF15097 Status
DROP TABLE IF EXISTS #TraceFlagStatus;
CREATE TABLE #TraceFlagStatus
(TraceFlag smallint, TFStatus tinyint, TFGlobal tinyint, TFSession tinyint);
INSERT INTO #TraceFlagStatus (TraceFlag, TFStatus, TFGlobal, TFSession)
EXEC ('DBCC TRACESTATUS (15097, -1) WITH NO_INFOMSGS');
DECLARE @TraceStatus tinyint = (SELECT TFStatus FROM #TraceFlagStatus);
-- Return relevant results
SELECT SERVERPROPERTY('ProductVersion') AS [Product Build], SERVERPROPERTY('Edition') AS [Edition],
@ProcessorDesc AS [Processor Description],
@CPUVectorizationLevel AS [CPU Vectorization Level], @TraceStatus AS [TF 15097 Status];
DROP TABLE IF EXISTS #ProcessorDesc;
DROP TABLE IF EXISTS #CPUVectorizationLevel;
DROP TABLE IF EXISTS #TraceFlagStatus;
END
------
-- Note: TF 15097 enables AVX-512 support for SQL Server 2022 (16.x) Preview and later (if your CPU supports it)
-- If you see AVX-512 in the CPU vectorization level results, you should consider enabling TF 15097
-- AVX-512 support only works in Enterprise Edition
-- Here are some CPU families that have good AVX-512 support:
-- Intel Ice Lake and later
-- AMD EYPC Genoa and later
-- Get information on location, time and size of any memory dumps from SQL Server (Query 23) (Memory Dump Info)
SELECT [filename], creation_time, size_in_bytes/1048576.0 AS [Size (MB)]
FROM sys.dm_server_memory_dumps WITH (NOLOCK)
ORDER BY creation_time DESC OPTION (RECOMPILE);
------
-- This will not return any rows if you have
-- not had any memory dumps (which is a good thing)
-- sys.dm_server_memory_dumps (Transact-SQL)
-- https://bit.ly/2elwWll
-- Look at Suspect Pages table (Query 24) (Suspect Pages)
SELECT DB_NAME(sp.database_id) AS [Database Name],
sp.[file_id], sp.page_id, sp.event_type,
sp.error_count, sp.last_update_date,
mf.name AS [Logical Name], mf.physical_name AS [File Path]
FROM msdb.dbo.suspect_pages AS sp WITH (NOLOCK)
INNER JOIN sys.master_files AS mf WITH (NOLOCK)
ON mf.database_id = sp.database_id
AND mf.file_id = sp.file_id
ORDER BY sp.database_id OPTION (RECOMPILE);
------
-- event_type value descriptions
-- 1 = 823 error caused by an operating system CRC error
-- or 824 error other than a bad checksum or a torn page (for example, a bad page ID)
-- 2 = Bad checksum
-- 3 = Torn page
-- 4 = Restored (The page was restored after it was marked bad)
-- 5 = Repaired (DBCC repaired the page)
-- 7 = Deallocated by DBCC
-- Ideally, this query returns no results. The table is limited to 1000 rows.
-- If you do get results here, you should do further investigation to determine the root cause
-- Manage the suspect_pages Table
-- https://bit.ly/2Fvr1c9
-- Read most recent entries from all SQL Server Error Logs (Query 25) (Error Log Entries)
DROP TABLE IF EXISTS #ErrorLogFiles;
CREATE TABLE #ErrorLogFiles
([Archive #] INT,[Date] NVARCHAR(25),[Log File Size (Byte)]INT)
INSERT INTO #ErrorLogFiles
([Archive #],[Date],[Log File Size (Byte)])
EXEC master.sys.xp_enumerrorlogs;
DROP TABLE IF EXISTS #SQLErrorLog_AllLogs;
CREATE TABLE #SQLErrorLog_AllLogs
(LogDate DATETIME ,ProcessInfo NVARCHAR(12), LogText NVARCHAR(4000))
DECLARE @i INT = 0;
DECLARE @sql NVARCHAR(200) = N'';
DECLARE @logCount INT = (SELECT COUNT(*) FROM #ErrorLogFiles);
WHILE (@i < @logCount)
BEGIN
IF(@i in (SELECT [Archive #] FROM #ErrorLogFiles))
BEGIN
SET @sql = N'INSERT INTO #SQLErrorLog_AllLogs (LogDate, ProcessInfo, LogText)
EXEC master.sys.sp_readerrorlog ' + CAST(@i AS NVARCHAR(2)) + N';'
EXEC master.sys.sp_executesql @sql;
END
SET @i += 1;
END
SELECT TOP(1000)LogDate, ProcessInfo, LogText
FROM #SQLErrorLog_AllLogs WITH (NOLOCK)
ORDER BY LogDate DESC OPTION (RECOMPILE);
DROP TABLE IF EXISTS #ErrorLogFiles;
DROP TABLE IF EXISTS #SQLErrorLog_AllLogs;
GO
------
-- Get number of data files in tempdb database (Query 26) (TempDB Data Files)
EXEC sys.xp_readerrorlog 0, 1, N'The tempdb database has';
------
-- Get the number of data files in the tempdb database
-- 4-8 data files that are all the same size is a good starting point
-- This query will return no results if your error log has been recycled since the instance was last started
-- Find unequal tempdb data initial file sizes (Query 27) (Tempdb Data File Sizes)
-- This query might take a few seconds depending on the size of your error log
EXEC sys.xp_readerrorlog 0, 1, N'The tempdb database data files are not configured with the same initial size';
------
-- You want this query to return no results
-- All of your tempdb data files should have the same initial size and autogrowth settings
-- This query will also return no results if your error log has been recycled since the instance was last started
-- KB3170020 - Informational messages added for tempdb configuration in the SQL Server error log in SQL Server 2012 and 2014
-- https://bit.ly/3IsR8jh
-- File names and paths for all user and system databases on instance (Query 28) (Database Filenames and Paths)
SELECT DB_NAME([database_id]) AS [Database Name],
[file_id], [name], physical_name, [type_desc], state_desc,
is_percent_growth, growth,
CONVERT(bigint, growth/128.0) AS [Growth in MB],
CONVERT(bigint, size/128.0) AS [Total Size in MB], max_size
FROM sys.master_files WITH (NOLOCK)
ORDER BY DB_NAME([database_id]), [file_id] OPTION (RECOMPILE);
------
-- Things to look at:
-- Are data files and log files on different drives?
-- Is everything on the C: drive?
-- Is tempdb on dedicated drives?
-- Is there only one tempdb data file?
-- Are all of the tempdb data files the same size?
-- Are there multiple data files for user databases?
-- Is percent growth enabled for any files (which is bad)?
-- Drive information for all fixed drives visible to the operating system (Query 29) (Fixed Drives)
SELECT fixed_drive_path, drive_type_desc,
CONVERT(DECIMAL(18,2), free_space_in_bytes/1073741824.0) AS [Available Space (GB)]
FROM sys.dm_os_enumerate_fixed_drives WITH (NOLOCK) OPTION (RECOMPILE);
------
-- This shows all of your drives, not just LUNs with SQL Server database files
-- New in SQL Server 2017
-- sys.dm_os_enumerate_fixed_drives (Transact-SQL)
-- https://bit.ly/2EZoHLj
-- Volume info for all LUNS that have database files on the current instance (Query 30) (Volume Info)
SELECT DISTINCT vs.volume_mount_point, vs.file_system_type, vs.logical_volume_name,
CONVERT(DECIMAL(18,2), vs.total_bytes/1073741824.0) AS [Total Size (GB)],
CONVERT(DECIMAL(18,2), vs.available_bytes/1073741824.0) AS [Available Size (GB)],
CONVERT(DECIMAL(18,2), vs.available_bytes * 1. / vs.total_bytes * 100.) AS [Space Free %],
vs.supports_compression, vs.is_compressed,
vs.supports_sparse_files, vs.supports_alternate_streams
FROM sys.master_files AS f WITH (NOLOCK)
CROSS APPLY sys.dm_os_volume_stats(f.database_id, f.[file_id]) AS vs
ORDER BY vs.volume_mount_point OPTION (RECOMPILE);
------
-- Shows you the total and free space on the LUNs where you have database files
-- Being low on free space can negatively affect performance
-- sys.dm_os_volume_stats (Transact-SQL)
-- https://bit.ly/2oBPNNr
-- Drive level latency information (Query 31) (Drive Level Latency)
SELECT tab.[Drive], tab.volume_mount_point AS [Volume Mount Point],
CASE
WHEN num_of_reads = 0 THEN 0
ELSE (io_stall_read_ms/num_of_reads)
END AS [Read Latency],
CASE
WHEN num_of_writes = 0 THEN 0
ELSE (io_stall_write_ms/num_of_writes)
END AS [Write Latency],
CASE
WHEN (num_of_reads = 0 AND num_of_writes = 0) THEN 0
ELSE (io_stall/(num_of_reads + num_of_writes))
END AS [Overall Latency],
CASE
WHEN num_of_reads = 0 THEN 0
ELSE (num_of_bytes_read/num_of_reads)
END AS [Avg Bytes/Read],
CASE
WHEN num_of_writes = 0 THEN 0
ELSE (num_of_bytes_written/num_of_writes)
END AS [Avg Bytes/Write],
CASE
WHEN (num_of_reads = 0 AND num_of_writes = 0) THEN 0
ELSE ((num_of_bytes_read + num_of_bytes_written)/(num_of_reads + num_of_writes))
END AS [Avg Bytes/Transfer]
FROM (SELECT LEFT(UPPER(mf.physical_name), 2) AS Drive, SUM(num_of_reads) AS num_of_reads,
SUM(io_stall_read_ms) AS io_stall_read_ms, SUM(num_of_writes) AS num_of_writes,
SUM(io_stall_write_ms) AS io_stall_write_ms, SUM(num_of_bytes_read) AS num_of_bytes_read,
SUM(num_of_bytes_written) AS num_of_bytes_written, SUM(io_stall) AS io_stall, vs.volume_mount_point
FROM sys.dm_io_virtual_file_stats(NULL, NULL) AS vfs
INNER JOIN sys.master_files AS mf WITH (NOLOCK)
ON vfs.database_id = mf.database_id AND vfs.file_id = mf.file_id
CROSS APPLY sys.dm_os_volume_stats(mf.database_id, mf.[file_id]) AS vs
GROUP BY LEFT(UPPER(mf.physical_name), 2), vs.volume_mount_point) AS tab
ORDER BY [Overall Latency] OPTION (RECOMPILE);
------
-- Shows you the drive-level latency for reads and writes, in milliseconds
-- Latency above 30-40ms is usually a problem
-- These latency numbers include all file activity against all SQL Server
-- database files on each drive since SQL Server was last started
-- sys.dm_io_virtual_file_stats (Transact-SQL)
-- https://bit.ly/3bRWUc0
-- sys.dm_os_volume_stats (Transact-SQL)
-- https://bit.ly/33thz2j
-- Calculates average latency per read, per write, and per total input/output for each database file (Query 32) (IO Latency by File)
SELECT DB_NAME(fs.database_id) AS [Database Name], CAST(fs.io_stall_read_ms/(1.0 + fs.num_of_reads) AS NUMERIC(10,1)) AS [avg_read_latency_ms],
CAST(fs.io_stall_write_ms/(1.0 + fs.num_of_writes) AS NUMERIC(10,1)) AS [avg_write_latency_ms],
CAST((fs.io_stall_read_ms + fs.io_stall_write_ms)/(1.0 + fs.num_of_reads + fs.num_of_writes) AS NUMERIC(10,1)) AS [avg_io_latency_ms],
CONVERT(DECIMAL(18,2), mf.size/128.0) AS [File Size (MB)], mf.physical_name, mf.type_desc, fs.io_stall_read_ms, fs.num_of_reads,
fs.io_stall_write_ms, fs.num_of_writes, fs.io_stall_read_ms + fs.io_stall_write_ms AS [io_stalls], fs.num_of_reads + fs.num_of_writes AS [total_io],
io_stall_queued_read_ms AS [Resource Governor Total Read IO Latency (ms)], io_stall_queued_write_ms AS [Resource Governor Total Write IO Latency (ms)]
FROM sys.dm_io_virtual_file_stats(null,null) AS fs
INNER JOIN sys.master_files AS mf WITH (NOLOCK)
ON fs.database_id = mf.database_id
AND fs.[file_id] = mf.[file_id]
ORDER BY avg_io_latency_ms DESC OPTION (RECOMPILE);
------
-- Helps determine which database files on the entire instance have the most I/O bottlenecks
-- This can help you decide whether certain LUNs are overloaded and whether you might
-- want to move some files to a different location or perhaps improve your I/O performance
-- These latency numbers include all file activity against each SQL Server
-- database file since SQL Server was last started
-- sys.dm_io_virtual_file_stats (Transact-SQL)
-- https://bit.ly/3bRWUc0
-- Look for I/O requests taking longer than 15 seconds in the six most recent SQL Server Error Logs (Query 33) (IO Warnings)
DROP TABLE IF EXISTS #IOWarningResults;
CREATE TABLE #IOWarningResults(LogDate datetime, ProcessInfo sysname, LogText nvarchar(1000));
INSERT INTO #IOWarningResults
EXEC xp_readerrorlog 0, 1, N'taking longer than 15 seconds';
INSERT INTO #IOWarningResults
EXEC xp_readerrorlog 1, 1, N'taking longer than 15 seconds';
INSERT INTO #IOWarningResults
EXEC xp_readerrorlog 2, 1, N'taking longer than 15 seconds';
INSERT INTO #IOWarningResults
EXEC xp_readerrorlog 3, 1, N'taking longer than 15 seconds';
INSERT INTO #IOWarningResults
EXEC xp_readerrorlog 4, 1, N'taking longer than 15 seconds';
INSERT INTO #IOWarningResults
EXEC xp_readerrorlog 5, 1, N'taking longer than 15 seconds';
SELECT LogDate, ProcessInfo, LogText
FROM #IOWarningResults
ORDER BY LogDate DESC;
DROP TABLE IF EXISTS #IOWarningResults;
------
-- Finding 15 second I/O warnings in the SQL Server Error Log is useful evidence of
-- poor I/O performance (which might have many different causes)
-- Look to see if you see any patterns in the results (same files, same drives, same time of day, etc.)
-- Diagnostics in SQL Server help detect stalled and stuck I/O operations
-- https://bit.ly/2qtaw73
-- Resource Governor Resource Pool information (Query 34) (RG Resource Pools)
SELECT pool_id, [Name], statistics_start_time,
min_memory_percent, max_memory_percent,
max_memory_kb/1024 AS [max_memory_mb],
used_memory_kb/1024 AS [used_memory_mb],
target_memory_kb/1024 AS [target_memory_mb],
min_iops_per_volume, max_iops_per_volume
FROM sys.dm_resource_governor_resource_pools WITH (NOLOCK)
OPTION (RECOMPILE);
------
-- sys.dm_resource_governor_resource_pools (Transact-SQL)
-- https://bit.ly/2MVU0Vy
-- Recovery model, log reuse wait description, log file size, log usage size (Query 35) (Database Properties)
-- and compatibility level for all databases on instance
SELECT db.[name] AS [Database Name], SUSER_SNAME(db.owner_sid) AS [Database Owner],
db.[compatibility_level] AS [DB Compatibility Level],
db.recovery_model_desc AS [Recovery Model],
db.log_reuse_wait_desc AS [Log Reuse Wait Description],
CONVERT(DECIMAL(18,2), ds.cntr_value/1024.0) AS [Total Data File Size on Disk (MB)],
CONVERT(DECIMAL(18,2), ls.cntr_value/1024.0) AS [Total Log File Size on Disk (MB)],
CONVERT(DECIMAL(18,2), lu.cntr_value/1024.0) AS [Log File Used (MB)],
CAST(CAST(lu.cntr_value AS FLOAT) / CAST(ls.cntr_value AS FLOAT)AS DECIMAL(18,2)) * 100 AS [Log Used %],
db.page_verify_option_desc AS [Page Verify Option], db.user_access_desc, db.state_desc, db.containment_desc,
db.is_mixed_page_allocation_on,
db.is_auto_create_stats_on, db.is_auto_update_stats_on, db.is_auto_update_stats_async_on, db.is_parameterization_forced,
db.snapshot_isolation_state_desc, db.is_read_committed_snapshot_on, db.is_auto_close_on, db.is_auto_shrink_on,
db.target_recovery_time_in_seconds, db.is_cdc_enabled, db.is_published, db.is_distributor, db.is_sync_with_backup,
db.group_database_id, db.replica_id, db.is_memory_optimized_enabled, db.is_memory_optimized_elevate_to_snapshot_on,
db.delayed_durability_desc, db.is_query_store_on,
db.is_temporal_history_retention_enabled, db.is_accelerated_database_recovery_on,
db.is_data_retention_enabled, db.is_ledger_on, db.is_change_feed_enabled,
db.is_master_key_encrypted_by_server, db.is_encrypted, de.encryption_state, de.percent_complete, de.key_algorithm, de.key_length
FROM sys.databases AS db WITH (NOLOCK)
LEFT OUTER JOIN sys.dm_os_performance_counters AS lu WITH (NOLOCK)
ON db.name = lu.instance_name
LEFT OUTER JOIN sys.dm_os_performance_counters AS ls WITH (NOLOCK)
ON db.name = ls.instance_name
LEFT OUTER JOIN sys.dm_os_performance_counters AS ds WITH (NOLOCK)
ON db.name = ds.instance_name
LEFT OUTER JOIN sys.dm_database_encryption_keys AS de WITH (NOLOCK)
ON db.database_id = de.database_id
WHERE lu.counter_name LIKE N'Log File(s) Used Size (KB)%'
AND ls.counter_name LIKE N'Log File(s) Size (KB)%'
AND ds.counter_name LIKE N'Data File(s) Size (KB)%'
AND ls.cntr_value > 0
ORDER BY db.[name] OPTION (RECOMPILE);
------
-- sys.databases (Transact-SQL)
-- https://bit.ly/2G5wqaX
-- sys.dm_os_performance_counters (Transact-SQL)
-- https://bit.ly/3kEO2JR
-- sys.dm_database_encryption_keys (Transact-SQL)
-- https://bit.ly/3mE7kkx
-- Things to look at:
-- How many databases are on the instance?
-- What recovery models are they using?
-- What is the log reuse wait description?
-- How full are the transaction logs?
-- What compatibility level are the databases on?
-- What is the Page Verify Option? (should be CHECKSUM)
-- Is Auto Update Statistics Asynchronously enabled?
-- What is target_recovery_time_in_seconds? (should be 60 for user databases)
-- Is Delayed Durability enabled?
-- Make sure auto_shrink and auto_close are not enabled!
-- is_mixed_page_allocation_on is a new property for SQL Server 2016. Equivalent to TF 1118 for a user database
-- SQL Server 2016: Changes in default behavior for autogrow and allocations for tempdb and user databases
-- https://bit.ly/2evRZSR
-- A non-zero value for target_recovery_time_in_seconds means that indirect checkpoint is enabled
-- If the setting has a zero value it indicates that automatic checkpoint is enabled
-- Changes in SQL Server 2016 Checkpoint Behavior
-- https://bit.ly/2pdggk3
-- Missing Indexes for all databases by Index Advantage (Query 36) (Missing Indexes All Databases)
SELECT CONVERT(decimal(18,2), migs.user_seeks * migs.avg_total_user_cost * (migs.avg_user_impact * 0.01)) AS [index_advantage],
CONVERT(nvarchar(25), migs.last_user_seek, 20) AS [last_user_seek],
mid.[statement] AS [Database.Schema.Table],
COUNT(1) OVER(PARTITION BY mid.[statement]) AS [missing_indexes_for_table],
COUNT(1) OVER(PARTITION BY mid.[statement], mid.equality_columns) AS [similar_missing_indexes_for_table],
mid.equality_columns, mid.inequality_columns, mid.included_columns, migs.user_seeks,
CONVERT(decimal(18,2), migs.avg_total_user_cost) AS [avg_total_user_,cost], migs.avg_user_impact,
REPLACE(REPLACE(LEFT(st.[text], 255), CHAR(10),''), CHAR(13),'') AS [Short Query Text]
FROM sys.dm_db_missing_index_groups AS mig WITH (NOLOCK)