How to improve merge replication in SQL Server?

How to improve merge replication in SQL Server?

Occasionally re-index merge replication system tables. As part of maintenance for merge replication, occasionally check the growth of the system tables associated with merge replication: MSmerge_contents, MSmerge_genhistory, and MSmerge_tombstone, MSmerge_current_partition_mappings]

What does parallel uploaddownload do in SQL Server?

SQL Server 2005 (9.x) introduced a new Merge Agent parameter: –ParallelUploadDownload. Setting this parameter allows the Merge Agent to process in parallel the changes uploaded to the Publisher and those downloaded to the Subscriber.

How does replication optimize performance for partition sharing?

Replication can optimize performance for data that is not shared between partitions or subscriptions. For more information, see Parameterized Row Filters. Do not create complex join filter hierarchies. Join filters with five or more tables can significantly impact performance during merge processing.

How does synchronization affect the performance of a merge agent?

When synchronization occurs, the Merge Agent might need to read and transfer the entire data row from a Publisher or Subscriber. If the row contains columns that use LOBs, this process can require additional memory allocation and negatively impact performance even though these columns may not have been updated.

When to avoid precomputed partitions in merge agent?

Avoid executing batches with lots of changes when you use precomputed partitions. When the Merge Agent is run after you run a batch that contains lots of data changes, the agent tries to divide the large batch into smaller batches. During this time, other Merge Agent processes may be blocked.

Why is my replication agent not logging progress?

The replication agent has not logged a progress message in 10 minutes. This might indicate an unresponsive agent or high system activity. Verify that records are being replicated to the destination and that connections to the Subscriber, Publisher, and Distributor are still active.

How to create replication in SQL Server management studio?

Now let us create SQL Server merge replication and add these tables to the merge publication. Login to server using SQL Server Management studio -> Navigate to the SQL Server replication folder -> click on Local publications -> right click -> click on New Publication. Please refer to the below image.

What happens when you replicate a table in SQL Server?

He was under the assumption that adding a table to merge replication will simply replicate all the objects that were created on top of the table. Triggers, Indexes, constraints and foreign keys created on a table show different behavior while applying snapshot and after applying snapshot.

How to improve merge performance in SQL Server?

We recommend that if you are generating join filters of five or more tables that you consider other solutions: Avoid filtering tables that are primarily lookup tables, smaller tables, and tables that are not subject to change. Make those tables part of the publication in their entirety.