Hilft es hier, die Isolationsstufe auf RCSI (Read Committed Snapshot Isolation) zu ändern?
Dies ist keine einfache Änderung und bringt eine zusätzliche Tempdb-Strafe mit sich. Ich würde Ihnen nicht empfehlen , nur die Isolationsstufe auf RCSI zu ändern, ohne die Vorteile in Ihrer Umgebung ordnungsgemäß zu testen und zu sehen. Vertrauen Sie mir, dies ist ein Vorschlaghammer-Ansatz.
Wir sind kürzlich auf dasselbe Problem gestoßen
Bei wenigen an der Replikation beteiligten Tabellen werden umfangreiche Aktualisierungen durchgeführt, und der Protokollleser scannt lediglich das Transaktionsprotokoll
Im Folgenden habe ich das Problem behoben:
Artikel als BATCHED replizieren lassen (Diese Änderung ist dynamisch und erfordert keine Neuinitialisierung ) :
- Dies kann durch Klicken mit der rechten Maustaste auf Veröffentlichung -> Generieren von Skripten -> Überprüfen des
@statusWerts erfolgen. Jeder Wert unter 16 gibt an, dass die Replikation mit TSQL ==> NOT Batched erfolgt!
Selbst wenn 1 Artikel nicht auf BATCH eingestellt ist, wird keiner der Artikel BATCHED, wenn Änderungen am Abonnenten vorgenommen werden.
Verwenden Sie unter TSQL
EXEC sp_changearticle @publication = N'<pub name>' -- your publication Name
, @article = N'<article name>' -- your article Name
, @property = 'status'
, @value = 'parameters'
Erstellt einen nicht clusted Index für die Verteilungsdatenbank:
USE [distribution]
GO
CREATE NONCLUSTERED INDEX [nc_MSrepl_commands_DBA]
ON [dbo].[MSrepl_commands] ([publisher_database_id],[article_id],[xact_seqno])
INCLUDE ([type],[originator_id])
GO
Weitere Informationen zur Optimierung finden Sie unter Verbessern der Transaktionsreplikationsleistung, insbesondere unter Parameter des Verteilungsagenten und des Protokollleseragenten.
Unten ist das Skript, mit dem ich den T-Rep-Replikationsstatus finde:
USE [distribution]
-- Ref: http://www.sqlservercentral.com/blogs/basits-sql-server-tips/2012/07/25/t-sql-script-to-monitor-transactional-replication-status/
IF OBJECT_ID('Tempdb.dbo.#ReplStats') IS NOT NULL
DROP TABLE #ReplStats
CREATE TABLE [dbo].[#ReplStats](
[DistributionAgentName] [nvarchar](100) NOT NULL,
[DistributionAgentStartTime] [datetime] NOT NULL,
[DistributionAgentRunningDurationInSeconds] [int] NOT NULL,
[IsAgentRunning] [bit] NULL,
[ReplicationStatus] [varchar](14) NULL,
[LastSynchronized] [datetime] NOT NULL,
[Comments] [nvarchar](max) NOT NULL,
[Publisher] [sysname] NOT NULL,
[PublicationName] [sysname] NOT NULL,
[PublisherDB] [sysname] NOT NULL,
[Subscriber] [nvarchar](128) NULL,
[SubscriberDB] [sysname] NULL,
[SubscriptionType] [varchar](64) NULL,
[DistributionDB] [sysname] NULL,
[Article] [sysname] NOT NULL,
[UndelivCmdsInDistDB] [int] NULL,
[DelivCmdsInDistDB] [int] NULL,
[CurrentSessionDeliveryRate] [float] NOT NULL,
[CurrentSessionDeliveryLatency] [int] NOT NULL,
[TotalTransactionsDeliveredInCurrentSession] [int] NOT NULL,
[TotalCommandsDeliveredInCurrentSession] [int] NOT NULL,
[AverageCommandsDeliveredInCurrentSession] [int] NOT NULL,
[DeliveryRate] [float] NOT NULL,
[DeliveryLatency] [int] NOT NULL,
[TotalCommandsDeliveredSinceSubscriptionSetup] [int] NOT NULL,
[SequenceNumber] [varbinary](16) NULL,
[LastDistributerSync] [datetime] NULL,
[Retention] [int] NULL,
[WorstLatency] [int] NULL,
[BestLatency] [int] NULL,
[AverageLatency] [int] NULL,
[CurrentLatency] [int] NULL
) ON [PRIMARY]
INSERT INTO #ReplStats
SELECT da.[name] AS [DistributionAgentName]
,dh.[start_time] AS [DistributionAgentStartTime]
,dh.[duration] AS [DistributionAgentRunningDurationInSeconds]
,md.[isagentrunningnow] AS [IsAgentRunning]
,CASE md.[status]
WHEN 1 THEN '1 - Started'
WHEN 2 THEN '2 - Succeeded'
WHEN 3 THEN '3 - InProgress'
WHEN 4 THEN '4 - Idle'
WHEN 5 THEN '5 - Retrying'
WHEN 6 THEN '6 - Failed'
END AS [ReplicationStatus]
,dh.[time] AS [LastSynchronized]
,dh.[comments] AS [Comments]
,md.[publisher] AS [Publisher]
,da.[publication] AS [PublicationName]
,da.[publisher_db] AS [PublisherDB]
,CASE
WHEN da.[anonymous_subid] IS NOT NULL
THEN UPPER(da.[subscriber_name])
ELSE UPPER (s.[name]) END AS [Subscriber]
,da.[subscriber_db] AS [SubscriberDB]
,CASE da.[subscription_type]
WHEN '0' THEN 'Push'
WHEN '1' THEN 'Pull'
WHEN '2' THEN 'Anonymous'
ELSE CAST(da.[subscription_type] AS [varchar](64)) END AS [SubscriptionType]
,md.[distdb] AS [DistributionDB]
,ma.[article] AS [Article]
,ds.[UndelivCmdsInDistDB]
,ds.[DelivCmdsInDistDB]
,dh.[current_delivery_rate] AS [CurrentSessionDeliveryRate]
,dh.[current_delivery_latency] AS [CurrentSessionDeliveryLatency]
,dh.[delivered_transactions] AS [TotalTransactionsDeliveredInCurrentSession]
,dh.[delivered_commands] AS [TotalCommandsDeliveredInCurrentSession]
,dh.[average_commands] AS [AverageCommandsDeliveredInCurrentSession]
,dh.[delivery_rate] AS [DeliveryRate]
,dh.[delivery_latency] AS [DeliveryLatency]
,dh.[total_delivered_commands] AS [TotalCommandsDeliveredSinceSubscriptionSetup]
,dh.[xact_seqno] AS [SequenceNumber]
,md.[last_distsync] AS [LastDistributerSync]
,md.[retention] AS [Retention]
,md.[worst_latency] AS [WorstLatency]
,md.[best_latency] AS [BestLatency]
,md.[avg_latency] AS [AverageLatency]
,md.[cur_latency] AS [CurrentLatency]
FROM [distribution]..[MSdistribution_status] ds
INNER JOIN [distribution]..[MSdistribution_agents] da
ON da.[id] = ds.[agent_id]
INNER JOIN [distribution]..[MSArticles] ma
ON ma.publisher_id = da.publisher_id
AND ma.[article_id] = ds.[article_id]
INNER JOIN [distribution]..[MSreplication_monitordata] md
ON [md].[job_id] = da.[job_id]
INNER JOIN [distribution]..[MSdistribution_history] dh
ON [dh].[agent_id] = md.[agent_id]
AND md.[agent_type] = 3
INNER JOIN [master].[sys].[servers] s
ON s.[server_id] = da.[subscriber_id]
--Created WHEN your publication has the immediate_sync property set to true. This property dictates
--whether snapshot is available all the time for new subscriptions to be initialized.
--This affects the cleanup behavior of transactional replication. If this property is set to true,
--the transactions will be retained for max retention period instead of it getting cleaned up
--as soon as all the subscriptions got the change.
WHERE da.[subscriber_db] <> 'virtual'
AND da.[anonymous_subid] IS NULL
AND dh.[start_time] = (SELECT TOP 1 start_time
FROM [distribution]..[MSdistribution_history] a
JOIN [distribution]..[MSdistribution_agents] b
ON a.[agent_id] = b.[id] AND b.[subscriber_db] <> 'virtual'
WHERE [runstatus] <> 1
ORDER BY [start_time] DESC)
AND dh.[runstatus] <> 1
SELECT 'Transactional Replication Summary' AS [Comments];
SELECT [DistributionAgentName]
,[DistributionAgentStartTime]
,[DistributionAgentRunningDurationInSeconds]
,[IsAgentRunning]
,[ReplicationStatus]
,[LastSynchronized]
,[Comments]
,[Publisher]
,[PublicationName]
,[PublisherDB]
,[Subscriber]
,[SubscriberDB]
,[SubscriptionType]
,[DistributionDB]
,SUM([UndelivCmdsInDistDB]) AS [UndelivCmdsInDistDB]
,SUM([DelivCmdsInDistDB]) AS [DelivCmdsInDistDB]
,[CurrentSessionDeliveryRate]
,[CurrentSessionDeliveryLatency]
,[TotalTransactionsDeliveredInCurrentSession]
,[TotalCommandsDeliveredInCurrentSession]
,[AverageCommandsDeliveredInCurrentSession]
,[DeliveryRate]
,[DeliveryLatency]
,[TotalCommandsDeliveredSinceSubscriptionSetup]
,[SequenceNumber]
,[LastDistributerSync]
,[Retention]
,[WorstLatency]
,[BestLatency]
,[AverageLatency]
,[CurrentLatency]
FROM #ReplStats
GROUP BY [DistributionAgentName]
,[DistributionAgentStartTime]
,[DistributionAgentRunningDurationInSeconds]
,[IsAgentRunning]
,[ReplicationStatus]
,[LastSynchronized]
,[Comments]
,[Publisher]
,[PublicationName]
,[PublisherDB]
,[Subscriber]
,[SubscriberDB]
,[SubscriptionType]
,[DistributionDB]
,[CurrentSessionDeliveryRate]
,[CurrentSessionDeliveryLatency]
,[TotalTransactionsDeliveredInCurrentSession]
,[TotalCommandsDeliveredInCurrentSession]
,[AverageCommandsDeliveredInCurrentSession]
,[DeliveryRate]
,[DeliveryLatency]
,[TotalCommandsDeliveredSinceSubscriptionSetup]
,[SequenceNumber]
,[LastDistributerSync]
,[Retention]
,[WorstLatency]
,[BestLatency]
,[AverageLatency]
,[CurrentLatency]
SELECT 'Transactional Replication Summary Details' AS [Comments];
SELECT [Publisher]
,[PublicationName]
,[PublisherDB]
,[Article]
,[Subscriber]
,[SubscriberDB]
,[SubscriptionType]
,[DistributionDB]
,SUM([UndelivCmdsInDistDB]) AS [UndelivCmdsInDistDB]
,SUM([DelivCmdsInDistDB]) AS [DelivCmdsInDistDB]
FROM #ReplStats
GROUP BY [Publisher]
,[PublicationName]
,[PublisherDB]
,[Article]
,[Subscriber]
,[SubscriberDB]
,[SubscriptionType]
,[DistributionDB]