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What happens if you run a read only query on a replica?
If such a query were to run for a long time, it would cause the read-only replica to be significantly out of sync with the primary replica. If a long-running query on a read-only replica causes this kind of blocking, it will be automatically terminated.
Why does secondary replica take longer to insert than primary?
So the increase in time for the acknowledgement of the secondary replica causes the primary replica to take longer on the insert. It is much better explained in the document though, under the ‘Impact on Primary Workload’ section.
Can a read only replica drop an extended event session?
An extended event session on a read-only replica that is based on a session definition from the primary replica can be started and stopped independently of the primary replica. When an extended event session is dropped on the primary replica, it is also dropped on all read-only replicas.
Are there read only replicas in azure database?
APPLIES TO: Azure SQL Database Azure SQL Managed Instance As part of High Availability architecture, each single database, elastic pool database, and managed instance in the Premium and Business Critical service tier is automatically provisioned with a primary read-write replica and several secondary read-only replicas.
How to enable read only access to a secondary replica?
Read-only access to a readable secondary replica When using the bcp Utility or sqlcmd Utility , you can specify read-only access to any secondary replica that is enabled for read-only access by specifying the -K ReadOnly switch.
Can a listener be redirected to a primary replica?
The Listener Name will always redirect to the primary replica unless we configure a read-only routing list. A read-only routing list is a list of all Availability Group Replicas that are configured to accept read-only workloads.
How are read only replicas used in hyperscale?
Hyperscale supports multiple read-only replicas. When connected to a read-only replica, Dynamic Management Views (DMVs) reflect the state of the replica, and can be queried for monitoring and troubleshooting purposes. The database engine provides multiple views to expose a wide variety of monitoring data.