Is there such thing as an Availability Group failover trigger?
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Is there such thing as a trigger for Availability Group failovers?
I want a certain action to happen when an AG fails over. Specifically, I want to turn on a database setting (turning on RCSI). I want to do this on a failover in order to minimize disruption to 24/7 workloads and scheduled maintenance windows are hard to come by.
I know that sp_procoption can be used to mark procedures as startup procedures.
This seems like it could work for failover clusters, but not for Availability Groups.
I did consider adding an alert (sp_add_alert) on message_id=26069 in order to respond to failover actions with a sql agent job. But this seems less direct and in practice it seems slow
sql-server
asked yesterday
Michael J SwartMichael J Swart
1,07551229
|
show 2 more comments
Is there such thing as a trigger for Availability Group failovers?
I want a certain action to happen when an AG fails over. Specifically, I want to turn on a database setting (turning on RCSI). I want to do this on a failover in order to minimize disruption to 24/7 workloads and scheduled maintenance windows are hard to come by.
I know that sp_procoption can be used to mark procedures as startup procedures.
This seems like it could work for failover clusters, but not for Availability Groups.
I did consider adding an alert (sp_add_alert) on message_id=26069 in order to respond to failover actions with a sql agent job. But this seems less direct and in practice it seems slow
sql-server
asked yesterday
Michael J SwartMichael J Swart
1,07551229
Is this a common thing others would want? Or is it just me?
– Michael J Swart
yesterday
Hmm, what’s the advantage of not having RCSI enabled on the secondary by default? Is it because of the additional versioning information? (If so I Wonder if this is actually a bad thing to not have slots for versioning in your existing rows)?
– eckes
yesterday
You can’t have different RCSI settings on primary and secondary. Any queries that read on the secondary node run under Snapshot isolation any way.
– Michael J Swart
yesterday
If you cannot have different settings I don’t understand what the trigger should do?
– eckes
yesterday
I wanted to change the setting during a failover. The timing was the important part. The change in the RCSI setting takes a small outage, so does the failover. I wanted one to happen at the same time as the other.
– Michael J Swart
yesterday
|
show 2 more comments
Is there such thing as a trigger for Availability Group failovers?
I want a certain action to happen when an AG fails over. Specifically, I want to turn on a database setting (turning on RCSI). I want to do this on a failover in order to minimize disruption to 24/7 workloads and scheduled maintenance windows are hard to come by.
I know that sp_procoption can be used to mark procedures as startup procedures.
This seems like it could work for failover clusters, but not for Availability Groups.
I did consider adding an alert (sp_add_alert) on message_id=26069 in order to respond to failover actions with a sql agent job. But this seems less direct and in practice it seems slow
sql-server
asked yesterday
Michael J SwartMichael J Swart
1,07551229
Is there such thing as a trigger for Availability Group failovers?
I want a certain action to happen when an AG fails over. Specifically, I want to turn on a database setting (turning on RCSI). I want to do this on a failover in order to minimize disruption to 24/7 workloads and scheduled maintenance windows are hard to come by.
I know that sp_procoption can be used to mark procedures as startup procedures.
This seems like it could work for failover clusters, but not for Availability Groups.
I did consider adding an alert (sp_add_alert) on message_id=26069 in order to respond to failover actions with a sql agent job. But this seems less direct and in practice it seems slow
sql-server
sql-server
asked yesterday
Michael J SwartMichael J Swart
1,07551229
asked yesterday
Michael J SwartMichael J Swart
1,07551229
asked yesterday
Michael J SwartMichael J Swart
1,07551229
asked yesterday
Michael J SwartMichael J Swart
1,07551229
asked yesterday
Michael J SwartMichael J Swart
1,07551229
1,07551229
Is this a common thing others would want? Or is it just me?
– Michael J Swart
yesterday
Hmm, what’s the advantage of not having RCSI enabled on the secondary by default? Is it because of the additional versioning information? (If so I Wonder if this is actually a bad thing to not have slots for versioning in your existing rows)?
– eckes
yesterday
You can’t have different RCSI settings on primary and secondary. Any queries that read on the secondary node run under Snapshot isolation any way.
– Michael J Swart
yesterday
If you cannot have different settings I don’t understand what the trigger should do?
– eckes
yesterday
I wanted to change the setting during a failover. The timing was the important part. The change in the RCSI setting takes a small outage, so does the failover. I wanted one to happen at the same time as the other.
– Michael J Swart
yesterday
|
show 2 more comments
Is this a common thing others would want? Or is it just me?
– Michael J Swart
yesterday
Hmm, what’s the advantage of not having RCSI enabled on the secondary by default? Is it because of the additional versioning information? (If so I Wonder if this is actually a bad thing to not have slots for versioning in your existing rows)?
– eckes
yesterday
You can’t have different RCSI settings on primary and secondary. Any queries that read on the secondary node run under Snapshot isolation any way.
– Michael J Swart
yesterday
If you cannot have different settings I don’t understand what the trigger should do?
– eckes
yesterday
I wanted to change the setting during a failover. The timing was the important part. The change in the RCSI setting takes a small outage, so does the failover. I wanted one to happen at the same time as the other.
– Michael J Swart
yesterday
Is this a common thing others would want? Or is it just me?
– Michael J Swart
yesterday
Is this a common thing others would want? Or is it just me?
– Michael J Swart
yesterday
Hmm, what’s the advantage of not having RCSI enabled on the secondary by default? Is it because of the additional versioning information? (If so I Wonder if this is actually a bad thing to not have slots for versioning in your existing rows)?
– eckes
yesterday
Hmm, what’s the advantage of not having RCSI enabled on the secondary by default? Is it because of the additional versioning information? (If so I Wonder if this is actually a bad thing to not have slots for versioning in your existing rows)?
– eckes
yesterday
You can’t have different RCSI settings on primary and secondary. Any queries that read on the secondary node run under Snapshot isolation any way.
– Michael J Swart
yesterday
You can’t have different RCSI settings on primary and secondary. Any queries that read on the secondary node run under Snapshot isolation any way.
– Michael J Swart
yesterday
If you cannot have different settings I don’t understand what the trigger should do?
– eckes
yesterday
If you cannot have different settings I don’t understand what the trigger should do?
– eckes
yesterday
I wanted to change the setting during a failover. The timing was the important part. The change in the RCSI setting takes a small outage, so does the failover. I wanted one to happen at the same time as the other.
– Michael J Swart
yesterday
I wanted to change the setting during a failover. The timing was the important part. The change in the RCSI setting takes a small outage, so does the failover. I wanted one to happen at the same time as the other.
– Michael J Swart
yesterday
|
show 2 more comments
2 Answers
2
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oldest
votes
No. Triggers are not at an instance or AG level. You'd need to base something on the failover event or better yet, as part of a SQL Server Agent job, just check to see if that replica is the primary and then do (or not do) something.
answered yesterday
Allan HirtAllan Hirt
742
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Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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I've done things like this before, but all I found available was the alerts. There's actually 2 different alerts, one that fires for each database in the AG, and another that fires when the entire AG fails over. So you have some flexibility.
answered yesterday
Bob PusateriBob Pusateri
49926
add a comment |
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2 Answers
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2 Answers
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No. Triggers are not at an instance or AG level. You'd need to base something on the failover event or better yet, as part of a SQL Server Agent job, just check to see if that replica is the primary and then do (or not do) something.
answered yesterday
Allan HirtAllan Hirt
742
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
No. Triggers are not at an instance or AG level. You'd need to base something on the failover event or better yet, as part of a SQL Server Agent job, just check to see if that replica is the primary and then do (or not do) something.
answered yesterday
Allan HirtAllan Hirt
742
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
No. Triggers are not at an instance or AG level. You'd need to base something on the failover event or better yet, as part of a SQL Server Agent job, just check to see if that replica is the primary and then do (or not do) something.
answered yesterday
Allan HirtAllan Hirt
742
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
No. Triggers are not at an instance or AG level. You'd need to base something on the failover event or better yet, as part of a SQL Server Agent job, just check to see if that replica is the primary and then do (or not do) something.
answered yesterday
Allan HirtAllan Hirt
742
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited yesterday
answered yesterday
Allan HirtAllan Hirt
742
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered yesterday
Allan HirtAllan Hirt
742
answered yesterday
Allan HirtAllan Hirt
742
742
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Allan Hirt is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
I've done things like this before, but all I found available was the alerts. There's actually 2 different alerts, one that fires for each database in the AG, and another that fires when the entire AG fails over. So you have some flexibility.
answered yesterday
Bob PusateriBob Pusateri
49926
add a comment |
I've done things like this before, but all I found available was the alerts. There's actually 2 different alerts, one that fires for each database in the AG, and another that fires when the entire AG fails over. So you have some flexibility.
answered yesterday
Bob PusateriBob Pusateri
49926
add a comment |
I've done things like this before, but all I found available was the alerts. There's actually 2 different alerts, one that fires for each database in the AG, and another that fires when the entire AG fails over. So you have some flexibility.
answered yesterday
Bob PusateriBob Pusateri
49926
I've done things like this before, but all I found available was the alerts. There's actually 2 different alerts, one that fires for each database in the AG, and another that fires when the entire AG fails over. So you have some flexibility.
answered yesterday
Bob PusateriBob Pusateri
49926
answered yesterday
Bob PusateriBob Pusateri
49926
answered yesterday
Bob PusateriBob Pusateri
49926
answered yesterday
Bob PusateriBob Pusateri
49926
49926
add a comment |
add a comment |
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Is this a common thing others would want? Or is it just me?
– Michael J Swart
yesterday
Hmm, what’s the advantage of not having RCSI enabled on the secondary by default? Is it because of the additional versioning information? (If so I Wonder if this is actually a bad thing to not have slots for versioning in your existing rows)?
– eckes
yesterday
You can’t have different RCSI settings on primary and secondary. Any queries that read on the secondary node run under Snapshot isolation any way.
– Michael J Swart
yesterday
If you cannot have different settings I don’t understand what the trigger should do?
– eckes
yesterday
I wanted to change the setting during a failover. The timing was the important part. The change in the RCSI setting takes a small outage, so does the failover. I wanted one to happen at the same time as the other.
– Michael J Swart
yesterday