Category: DBA Utilities

Always On Availability Group, DBA Utilities, SQL

Handy Troubleshooting T-SQL queries for Always On Availability Groups in SQL Server
Today, as part of a database migration from (one server to another server), wanted to check few things related to Always On Availability Groups to make sure all are intact. I am sharing those troubleshooting queries prepared for my verification with this blog post, hope this helps you as well.

How to identify available AGs to the server as Primary replica?

SELECT Groups.[Name] AS [AGname], [Primary_recovery_health_desc],[synchronization_health_desc],
automated_backup_preference_desc,dtc_support,db_failover,is_distributed, count(AGDatabases.database_name) [# Databases]
FROM sys.dm_hadr_availability_group_states States
INNER JOIN master.sys.availability_groups Groups ON States.group_id = Groups.group_id
INNER JOIN sys.availability_databases_cluster AGDatabases ON Groups.group_id = AGDatabases.group_id
WHERE primary_replica = @@Servername
Group by Groups.[Name] , [Primary_recovery_health_desc],[synchronization_health_desc],
automated_backup_preference_desc,dtc_support,db_failover,is_distributed

How to identify available AGs to the server as Secondary replica?

SELECT Groups.[Name] AS [AGname], [secondary_recovery_health_desc],[synchronization_health_desc],
automated_backup_preference_desc,dtc_support,db_failover,is_distributed
FROM sys.dm_hadr_availability_group_states States
INNER JOIN master.sys.availability_groups Groups ON States.group_id = Groups.group_id
WHERE primary_replica != @@Servername

How to identify AG – Databases distribution of a Primary replica?

SELECT
Groups.[Name] AS AGname,
AGD.database_name AS Databasename
FROM sys.dm_hadr_availability_group_states States
INNER JOIN master.sys.availability_groups Groups ON States.group_id = Groups.group_id
INNER JOIN sys.availability_databases_cluster AGD ON Groups.group_id = AGD.group_id
WHERE primary_replica = @@Servername
ORDER BY AGname ASC, Databasename ASC;

How to identify AG – Databases distribution of a Secondary replica?

SELECT
Groups.[Name] AS AGname,
AGD.database_name AS Databasename
FROM sys.dm_hadr_availability_group_states States
INNER JOIN master.sys.availability_groups Groups ON States.group_id = Groups.group_id
INNER JOIN sys.availability_databases_cluster AGD ON Groups.group_id = AGD.group_id
WHERE primary_replica != @@Servername
ORDER BY AGname ASC, Databasename ASC;

A quick health check of your AG

SELECT DISTINCT
Groups.name AS AGname,
AGReplicas.replica_server_name,
AGStates.role_desc,
AGStates.synchronization_health_desc,
ISNULL(AGReplicaStates.suspend_reason_desc,'N/A') AS suspend_reason_desc
FROM sys.availability_groups Groups
INNER JOIN sys.dm_hadr_availability_replica_states as AGStates ON AGStates.group_id = Groups.group_id
INNER JOIN sys.availability_replicas as AGReplicas ON AGStates.replica_id = AGReplicas.replica_id
INNER JOIN sys.dm_hadr_database_replica_states as AGReplicaStates ON AGReplicas.replica_id = AGReplicaStates.replica_id
Order by Groups.name

A quick health check of your AG – DAG


SELECT 
   ag.[name] AS [AG Name], 
   ag.is_distributed, 
   ar.replica_server_name AS [Underlying AG], 
   ars.role_desc AS [Role], 
   ars.synchronization_health_desc AS [Sync Status]
FROM  sys.availability_groups AS ag
INNER JOIN sys.availability_replicas AS ar 
   ON  ag.group_id = ar.group_id        
INNER JOIN sys.dm_hadr_availability_replica_states AS ars       
   ON  ar.replica_id = ars.replica_id

A quick health check of your AG – DB 

select DB_NAME(database_id),* from sys.dm_hadr_database_replica_states 
where synchronization_health_desc != 'HEALTHY'

In addition, SSMS provides a good dashboard to understand the Always On Availability Group and health status as below. I would highly recommend to refer for more details.

I’d like to grow my readership. If you enjoyed this blog post, please share it with your friends!

DBA Utilities, SCRIPT GALLERY, SQL

SQL Server Inventory Queries – SQL Server Databases

Here is a T-SQL script used for inventory purpose on your SQL Server Databases.

Tested in: SQL Server 2016/SQL Server 2017

Script:

drop table if exists #SQLDatabaseInventory;
create table #SQLDatabaseInventory(
  ServerName varchar(128) default @@servername
, database_id bigint
, DBName varchar(128) default db_name()
, DBOwner varchar(128)
, CreateDate datetime2
, RecoveryModel varchar(12) 
, StateDesc varchar(60)
, CompatibilityLevel int
, DataFileSizeMB int
, LogFileSizeMB int
, DataUsageMB int
, IndexUsageMB int
, SizeMB decimal(17,2)
, Collation varchar(60)
, UserCount int
, RoleCount int
, TableCount int
, SPCount int
, UDFCount int
, ViewCount int
, DMLTriggerCount int
, IsCaseSensitive bit
, IsTrustWorthy bit
, LastFullBackupDate datetime2
, LastDiffBackupDate datetime2
, LastLogBackupDate datetime2
, IsTracked sql_variant);

insert into #SQLDatabaseInventory(database_id,DBName, DBOwner, CreateDate, RecoveryModel, StateDesc, CompatibilityLevel, IsCaseSensitive
, IsTrustWorthy, Collation, LastFullBackupDate, LastDiffBackupDate, LastLogBackupDate, IsTracked)
select database_id,name, suser_sname(owner_sid), create_date, recovery_model_desc, state_desc,compatibility_level
, IsCaseSensitive=CAST(CHARINDEX(N'_CS_', collation_name) AS bit), is_trustworthy_on, Collation_Name
, t.LastFullBackup, t.LastDiffBackup, t.LastLogBackup
, Case when is_cdc_enabled = 1 Then 'CDC' else '' End 
from master.sys.databases db
outer apply( SELECT
MAX(CASE WHEN b.type = 'D' THEN b.backup_finish_date END) AS LastFullBackup,
MAX(CASE WHEN b.type = 'I' THEN b.backup_finish_date END) AS LastDiffBackup,
MAX(CASE WHEN b.type = 'L' THEN b.backup_finish_date END) AS LastLogBackup
FROM msdb.dbo.backupset b 
where b.database_name = db.name
) t;

EXEC master.dbo.sp_msforeachdb'use [?]
update t set SizeMB=(select sum(size)/128. from dbo.sysfiles)
, DataUsageMB=x.DataUsageMB, IndexUsageMB=x.IndexUsageMB
   , DataFileSizeMB = u.DBSize, LogFileSizeMB = u.LogSize 
   , TableCount=y.TC, UDFCount=y.UC, SPCount = y.SC, ViewCount=y.VC
   , DMLTriggerCount=y.DC
   , UserCount = z.UC, RoleCount = z.RC
from #SQLDatabaseInventory t
   outer apply (
   SELECT SUM(case when df.type in (0,2,4) then df.size else 0 end)/128
   , SUM(case when df.type in (1,3) then df.size else 0 end)/128 
   FROM sys.database_files df 
   ) u(DBSize, LogSize)
   outer apply(select  DataUsageMB=sum(
    CASE
    When it.internal_type IN (202,204,207,211,212,213,214,215,216,221,222,236) Then 0
    When a.type <> 1 and p.index_id < 2 Then a.used_pages
    When p.index_id < 2 Then a.data_pages
    Else 0
    END)/128,
IndexUsageMB=(sum(a.used_pages)-sum(
    CASE
    When it.internal_type IN (202,204,207,211,212,213,214,215,216,221,222,236) Then 0
    When a.type < > 1 and p.index_id < 2 Then a.used_pages
    When p.index_id < 2 Then a.data_pages
    Else 0
    END
    ))/128
    from sys.partitions p join sys.allocation_units a on p.partition_id = a.container_id
    left join sys.internal_tables it on p.object_id = it.object_id
   ) x
   outer apply 
   ( select SC=Sum(case Type when ''P'' then 1 else 0 end)
    , DC=Sum(case Type when ''TR'' then 1 else 0 end)
    , TC=Sum(case Type when ''U'' then 1 end)
    , UC= sum(case when Type in (''TF'', ''IF'', ''FN'') then 1 else 0 end)
    , VC=Sum(case Type when ''V'' then 1 else 0 end)
    from sys.objects where object_id > 1024
    and type in (''U'',''P'',''TR'',''V'',''TF'',''IF'',''FN'')
   ) y
   outer apply 
   ( select UC = sum(case when [Type] in (''G'',''S'',''U'') then 1 else 0 end)
      , RC = sum(case when Type = ''R'' then 1 else 0 end)
      from sys.database_principals
      where principal_id > 4
   ) z where t.DBName=db_name();
'
SELECT A.*,
Case when is_parameterization_forced = 1 then 'ON' ELSE 'OFF' END is_parameterization_forced,
Case when is_query_store_on = 1 Then 'ON' ELSE 'OFF' End is_query_store_on,
Case When is_broker_enabled = 1 Then 'ON' ELSE 'OFF' End is_broker_enabled,log_reuse_wait_desc,
Case when is_read_only = 1 Then 'READ-ONLY' Else 'ALL' End is_read_only,
Case When is_auto_close_on = 1 Then 'Enabled' Else 'Disabled' End is_auto_close_on,
Case When is_auto_shrink_on = 1 Then 'Enabled' Else 'Disabled' End is_auto_shrink_on,
Case When is_auto_update_stats_on  = 1 Then 'Enabled' Else 'Disabed' End is_auto_update_stats_on
FROM #SQLDatabaseInventory A
inner join sys.databases B
On B.database_id = A.database_id

I would really love to hear from you what else you would like to see to this list?

See Also:

https://sqlzealots.com/2020/04/26/sql-server-inventory-queries-sql-server-instances/

I’d like to grow my readership. If you enjoyed this blog post, please share it with your friends!

 

DBA Utilities, SCRIPT GALLERY, SQL

SQL Server Inventory Queries – SQL Server Instances
Here is a T-SQL script used for inventory purpose on your SQL Server Instances.

Tested in: SQL Server 2016/SQL Server 2017

Script:

drop table if exists #t;
 
create table #t(
  ServerName varchar(128) default @@servername,
  ServerEdition sql_variant default serverproperty('edition'),
  ServerVersion sql_variant default @@version,
  ProductVersion sql_variant default serverproperty('productversion'),
  ProductLevel sql_variant default serverproperty('ProductLevel'),
  ServerCollation sql_variant default serverproperty('collation'),
  MachineName sql_variant default serverproperty('ComputerNamePhysicalNetBIOS'),
  DefaultDataPath sql_variant default serverproperty('InstanceDefaultDataPath'),
  DefaultLogPath sql_variant default serverproperty('InstanceDefaultLogPath'),
  IsClustered sql_variant default serverproperty('IsClustered'),
  IsFullTextInstalled sql_variant default serverproperty('IsFullTextInstalled'),
  IsIntegratedSecurityOnly sql_variant default CASE SERVERPROPERTY('IsIntegratedSecurityOnly')   
							WHEN 1 THEN 'Windows Authentication'   
							WHEN 0 THEN 'Windows and SQL Server Authentication'   
							END,
  cpu_count int,
  hyperthread_ratio int,
  Physical_Memory_GB Bigint,
  max_workers_count Bigint,
  sqlserver_start_time datetime,
  cores_per_socket bigint,
  numa_node_count bigint,
  --Configuration Details
  [Ad Hoc Distributed Queries] sql_variant,[xp_cmdshell] sql_variant,
  [optimize for ad hoc workloads] sql_variant,[backup compression default] sql_variant,
  [blofcked process threshold (s)] sql_variant,[default trace enabled] sql_variant,
  [clr enabled] sql_variant,[max server memory (MB)]sql_variant,
  [min server memory (MB)] sql_variant,[max degree of parallelism] sql_variant,
  [cost threshold for parallelism] sql_variant,[max text repl size (B)] sql_variant,
  [show advanced options] sql_variant
);

insert into #t(cpu_count,hyperthread_ratio,Physical_Memory_GB,max_workers_count,sqlserver_start_time,cores_per_socket,numa_node_count,
[Ad Hoc Distributed Queries],[xp_cmdshell],[optimize for ad hoc workloads],[backup compression default]
    ,[blofcked process threshold (s)],[default trace enabled],[clr enabled],[max server memory (MB)],[min server memory (MB)]
    ,[max degree of parallelism],[cost threshold for parallelism],[max text repl size (B)],[show advanced options])
 
select cpu_count,hyperthread_ratio,((Physical_Memory_kb/1024.0)/1024.0),max_workers_count,
sqlserver_start_time,cores_per_socket,numa_node_count,
B.*
from sys.dm_os_sys_info A
outer apply ( Select Max([Ad Hoc Distributed Queries]) [Ad Hoc Distributed Queries],
        Max([xp_cmdshell]) [xp_cmdshell] ,
        Max([optimize for ad hoc workloads]) [optimize for ad hoc workloads],
        Max([backup compression default]) [backup compression default],
        Max([blofcked process threshold (s)]) [blocked process threshold (s)],
        Max([default trace enabled]) [default trace enabled],
        Max([clr enabled]) [clr enabled],
        Max([max server memory (MB)]) [max server memory (MB)],
        Max([min server memory (MB)]) [min server memory (MB)],
        Max([max degree of parallelism]) [max degree of parallelism],
        Max([cost threshold for parallelism])[cost threshold for parallelism],
        Max([max text repl size (B)]) [max text repl size (B)],
        Max([show advanced options]) [show advanced options]
 From sys.configurations 
 PIVOT (MAX(Value_in_use) for Name in([Ad Hoc Distributed Queries],[xp_cmdshell],[optimize for ad hoc workloads],[backup compression default]
    ,[blofcked process threshold (s)],[default trace enabled],[clr enabled],[max server memory (MB)],[min server memory (MB)]
    ,[max degree of parallelism],[cost threshold for parallelism],[max text repl size (B)],[show advanced options])) as PVT) B
 
Select * From #t

I would really love to hear from you what else you would like to see to this list?

See Also:

https://sqlzealots.com/2020/04/26/sql-server-inventory-queries-sql-server-databases/

I’d like to grow my readership. If you enjoyed this blog post, please share it with your friends!

DBA Utilities, SQL

How to change mdf and ldf files path to instance default path in SQL Server

Here is a code snippet to change the mdf and ldf file path of an existing database to instance default path in SQL Server.
If you want to move to fixed path, then you can change the script as required.

Assumptions:
1. The script is mainly written for SQL Server 2016, for other version, please change as required.
2. The script will not execute or change the path automatically. It just prints the statements to execute. The user can validate the scripts and do the action as required. This is to prevent any unexpected events.


--Print 'Collect Default Data & Log information'
declare @DefLOG nvarchar(512)
declare @DefDATA nvarchar(512)

--Prepare the SQL statements for remapping
if (Cast(SERVERPROPERTY('Productmajorversion') as varchar(2))='13')
Begin

Set @DefLog = Cast( Serverproperty('InstanceDefaultLogPath') as varchar(512))
Set @DefDATA = Cast( Serverproperty('InstanceDefaultDataPath') as varchar(512))

--Print 'Move all datafiles'
declare cur_move cursor for
select --DB_NAME(dbid),name,filename, reverse(SUBSTRING(reverse(filename),1,CHARINDEX('\',reverse(filename))-1)),
'ALTER DATABASE ['+DB_NAME(dbid)+'] MODIFY FILE ( NAME = '''+name+''' , FILENAME = '''+@DefDATA+reverse(SUBSTRING(reverse(filename),1,CHARINDEX('\',reverse(filename))-1))+''' )'
from sys.sysaltfiles where dbid <32000
and groupid=1 and dbid>5 and charindex(@DefDATA,filename)=0
union all
select --DB_NAME(dbid),name,filename, reverse(SUBSTRING(reverse(filename),1,CHARINDEX('\',reverse(filename))-1)),
'ALTER DATABASE ['+DB_NAME(dbid)+'] MODIFY FILE ( NAME = '''+name+''' , FILENAME = '''+@DefLOG+reverse(SUBSTRING(reverse(filename),1,CHARINDEX('\',reverse(filename))-1))+''' )'
from sys.sysaltfiles where dbid <32000 and charindex(@DefDATA,filename)=0
and groupid=0 and dbid>5

declare @move varchar(max)
open cur_move
fetch next from cur_move into @move

while @@fetch_status=0
begin

print @move
--Exec (@move)

fetch next from cur_move into @move
end
close cur_move
deallocate cur_move

End
Else
Begin
Select 'This script supports SQL Server 2016 or later! For older version, you need to below to identify the default path, otherwise all are same.'
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultLog', @DefLOG OUTPUT
exec master.dbo.xp_instance_regread N'HKEY_LOCAL_MACHINE', N'Software\Microsoft\MSSQLServer\MSSQLServer', N'DefaultData', @DefDATA OUTPUT
return;
End
DBA Utilities, SCRIPT GALLERY, SQL

Cleanup of Load Runner Test data from SQL Server

Here is a script to purge the Load test data from your load runner database. This would be handy at times like running of disk space or performance issues related to load runner etc.


--Provide your Load runner database name
USE <<Loadrunner DBName>>
Create proc SQLZealot_CleanupTestData  (@DeleteDateUpto Datetime)
with encryption
as
Begin

	If not exists(Select 1 From sys.tables where name = 'TempTobeDeletedLoadRecords')
		Select LoadtestrunID into TempTobeDeletedLoadRecords from Loadtestrun (nolock) where StartTime < @DeleteDateUpto

	Declare @LoadtestrunID bigint
	While exists(Select 1 From TempTobeDeletedLoadRecords )
	Begin
		Set @LoadtestrunID = (Select Top 1 Loadtestrunid from TempTobeDeletedLoadRecords ORder by 1 asc)
		Exec Prc_DeleteLoadTestRun @Loadtestrunid
		Delete TempTobeDeletedLoadRecords Where Loadtestrunid = @LoadtestrunID
	End

	Drop Table TempTobeDeletedLoadRecords

End