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Always On Health Dashboard
by BF (Senior MSSQL Operations - Enterprise, Cloud, Strategy)
2021-01-23







Always On Health Dashboard:


SET NOCOUNT ON;

DECLARE @AGname NVARCHAR(128);
SET @AGname = NULL; --SET AGname for a specific AG for SET to NULL for ALL AG's
DECLARE @ReplicaRole CHAR(1) = 'P'; --A=ALL,=PRI,2=SEC

IF OBJECT_ID('TempDB..#tmpag_availability_groups') IS NOT NULL
DROP TABLE [#tmpag_availability_groups];

SELECT
*
INTO [#tmpag_availability_groups]
FROM [master].[sys].[availability_groups];

IF(@AGname IS NULL
OR EXISTS
(
SELECT
[Name]
FROM [#tmpag_availability_groups]
WHERE [Name] = @AGname
))
BEGIN

IF OBJECT_ID('TempDB..#tmpdbr_availability_replicas') IS NOT NULL
DROP TABLE [#tmpdbr_availability_replicas];

IF OBJECT_ID('TempDB..#tmpdbr_database_replica_cluster_states') IS NOT NULL
DROP TABLE [#tmpdbr_database_replica_cluster_states];

IF OBJECT_ID('TempDB..#tmpdbr_database_replica_states') IS NOT NULL
DROP TABLE [#tmpdbr_database_replica_states];

IF OBJECT_ID('TempDB..#tmpdbr_database_replica_states_primary_LCT') IS NOT NULL
DROP TABLE [#tmpdbr_database_replica_states_primary_LCT];

IF OBJECT_ID('TempDB..#tmpdbr_availability_replica_states') IS NOT NULL
DROP TABLE [#tmpdbr_availability_replica_states];

SELECT
[group_id],
[replica_id],
[replica_server_name],
[availability_mode],
[availability_mode_desc]
INTO [#tmpdbr_availability_replicas]
FROM [master].[sys].[availability_replicas];

SELECT
[replica_id],
[group_database_id],
[database_name],
[is_database_joined],
[is_failover_ready]
INTO [#tmpdbr_database_replica_cluster_states]
FROM [master].[sys].[dm_hadr_database_replica_cluster_states];

SELECT
*
INTO [#tmpdbr_database_replica_states]
FROM [master].[sys].[dm_hadr_database_replica_states];

SELECT
[replica_id],
[role],
[role_desc],
[is_local]
INTO [#tmpdbr_availability_replica_states]
FROM [master].[sys].[dm_hadr_availability_replica_states];

SELECT
[ars].[role],
[drs].[database_id],
[drs].[replica_id],
[drs].[last_commit_time]
INTO [#tmpdbr_database_replica_states_primary_LCT]
FROM [#tmpdbr_database_replica_states] AS [drs]
LEFT JOIN [#tmpdbr_availability_replica_states] [ars] ON [drs].[replica_id] = [ars].[replica_id]
WHERE [ars].[role] = 1;

SELECT
SERVERPROPERTY('MachineName') As 'MachineName',
SERVERPROPERTY('InstanceName') As 'InstanceName',
[AG].[name] AS [AvailabilityGroupName],
UPPER([dbcs].[database_name]) AS [AvailabilityDatabaseName],
[AR].[replica_server_name] AS [AvailabilityReplicaServerName],
ISNULL([arstates].[role_desc],3) AS [ReplicaRole],
ISNULL([dbr].[synchronization_state_desc],0) AS [SynchronizationState],
CASE ISNULL([dbcs].[is_failover_ready],0)
WHEN 0 Then 'NO'
WHEN 1 Then 'YES'
END AS [IsFailoverReady],
[AR].[availability_mode_desc] AS [AvailabilityMode],
ISNULL([dbr].[is_suspended],0) AS [IsSuspended],
ISNULL([dbr].[suspend_reason_desc],'-') AS [SuspendReason],
CASE [dbcs].[is_failover_ready]
WHEN 1
THEN 0
ELSE ISNULL(DATEDIFF([ss],[dbr].[last_commit_time],[dbrp].[last_commit_time]),0)
END AS [EstimatedDataLoss_(Seconds)],
ISNULL(CASE [dbr].[redo_rate]
WHEN 0
THEN-1
ELSE CAST([dbr].[redo_queue_size] AS FLOAT) / [dbr].[redo_rate]
END,-1) AS [EstimatedRecoveryTime_(Seconds)],
ISNULL([dbr].[last_received_time],0) AS [LastReceivedTime],
ISNULL([dbr].[last_redone_time],0) AS [LastRedoneTime],
ISNULL([dbr].[last_sent_time],0) AS [LastSentTime],
ISNULL([dbr].[log_send_queue_size],-1) AS [LogSendQueueSize],
ISNULL([dbr].[log_send_rate],-1) AS [LogSendRate_KB/S],
ISNULL([dbr].[redo_queue_size],-1) AS [RedoQueueSize_KB],
ISNULL([dbr].[redo_rate],-1) AS [RedoRate_KB/S],
ISNULL(CASE [dbr].[log_send_rate]
WHEN 0
THEN-1
ELSE CAST([dbr].[log_send_queue_size] AS FLOAT) / [dbr].[log_send_rate]
END,-1) AS [SynchronizationPerformance],
ISNULL([dbr].[filestream_send_rate],-1) AS [FileStreamSendRate],
ISNULL([dbcs].[is_database_joined],0) AS [IsJoined],
[arstates].[is_local] AS [IsLocal],
ISNULL([dbr].[last_commit_lsn],0) AS [LastCommitLSN],
ISNULL([dbr].[last_commit_time],0) AS [LastCommitTime],
ISNULL([dbr].[last_hardened_lsn],0) AS [LastHardenedLSN],
ISNULL([dbr].[last_hardened_time],0) AS [LastHardenedTime],
ISNULL([dbr].[last_received_lsn],0) AS [LastReceivedLSN],
ISNULL([dbr].[last_redone_lsn],0) AS [LastRedoneLSN]
FROM [#tmpag_availability_groups] AS [AG]
INNER JOIN [#tmpdbr_availability_replicas] AS [AR] ON [AR].[group_id] = [AG].[group_id]
INNER JOIN [#tmpdbr_database_replica_cluster_states] AS [dbcs] ON [dbcs].[replica_id] = [AR].[replica_id]
LEFT OUTER JOIN [#tmpdbr_database_replica_states] AS [dbr] ON [dbcs].[replica_id] = [dbr].[replica_id]
AND [dbcs].[group_database_id] = [dbr].[group_database_id]
LEFT OUTER JOIN [#tmpdbr_database_replica_states_primary_LCT] AS [dbrp] ON [dbr].[database_id] = [dbrp].[database_id]
INNER JOIN [#tmpdbr_availability_replica_states] AS [arstates] ON [arstates].[replica_id] = [AR].[replica_id]
WHERE
[AG].[name] = ISNULL(@AGname,[AG].[name])
AND
(ISNULL([arstates].[role_desc],3) LIKE
CASE @ReplicaRole
WHEN NULL THEN NULL
WHEN 'P' THEN '%PRIMARY%'
WHEN 'S' THEN '%SECONDARY%'
ELSE '%%'
END)
ORDER BY [AvailabilityReplicaServerName] ASC,
[AvailabilityDatabaseName] ASC;

END;
ELSE
BEGIN
RAISERROR('Invalid AG name supplied, please correct and try again',12,0);
END;