Periodic maintenance

EDB performs periodic maintenance to ensure stability and security of your clusters. We perform minor version upgrades and patch updates as part of this periodic maintenance. You're notified in the BigAnimal portal prior to maintenance occurring. Details are available on the BigAnimal status page. You can subscribe to get these updates in a feed by selecting Subscribe to Updates on the status page.

EDB reserves the right to upgrade customers to the latest minor version without prior notice in an extraordinary circumstance. You can't configure minor versions.

In some cases these updates might terminate existing network connections to your clusters. If that happens, the outage is typically less than 30 seconds. Be sure your applications are configured to automatically reconnect when connections are interrupted. Most modern database libraries do this by default.

Connectivity issues after an automatic upgrade

Most connectivity issues correct themselves when you reopen the connection after waiting for a minimum of five seconds. Our recommendation is to:

• Wait five seconds before your first attempt.
• For the next attempt, increase the wait by doubling the previous wait time. Keep trying this approach until you reach a maximum wait time of 60 seconds.

We also recommend that you set a maximum number of attempts to reopen the connection before your application reports that it can't reconnect.

When an active connection that's currently executing a command is interrupted, you might need to take extra action when reopening the connection. (For read-only transactions that were in progress, you can reopen the connection without any extra steps.) For a transaction that was writing to the database, you need to know whether the transaction was rolled back or whether it succeeded to determine whether you need to retry the transaction. If it was rolled back, you need to retry it. If it succeeded, you don't need to retry it. (It's possible for a transaction to succeed without sending you the commit acknowledgment from the database server, so you'll need to add some logic to be sure.)

Test your retry logic by creating an event that causes a brief downtime to see if it is handling these transactions correctly.

• On this page
• Connectivity issues after an automatic upgrade