What is latency in replication?
Replication latency is the amount of time it takes for a transaction that occurs in the primary database to be applied to the replicate database. The time includes Replication Agent processing, Replication Server processing, and network usage.
What is mysql latency?
From 1 to 64 clients the query response time (latency) is constant around 50 microseconds. It then grows to 70 microseconds for 128 clients, 140 microseconds for 256 clients, and 300 microseconds for 512 clients.
How is transactional latency related to transactional replication?
See the replicated transactions, it is more than 11 million, meaning there are over 11 million commands waiting to be delivered to the distribution database. In other words, they are still in the Transaction Log (T-Log) of the publisher database. So in this particular case, the latency is mainly between the publisher and the distributor.
How long does transactional replication take in SQL Server?
Monitoring SQL Server Transactional Replication. It is necessary to implement a latency report to monitor and alert if latency is above a certain threshold that you define. It could be 5 minutes, 10 minutes or even a few seconds depending on your environment and service level agreement (SLA) with the users.
How to measure latency and validate connections in SQL Server?
Applies to: SQL Server (all supported versions) Azure SQL Managed Instance This topic describes how to measure latency and validate connections for transactional replication in SQL Server by using Replication Monitor, Transact-SQL, or Replication Management Objects (RMO).
What does continuous mean in transactional replication function?
-Continuous – Specifies whether the agent tries to poll replicated transactions continually. If specified, the agent polls replicated transactions from the source at polling intervals even if there are no transactions pending. -HistoryVerboseLevel [ 0| 1| 2] – Specifies the amount of history logged during a log reader operation.