These are the docs for the Metabase master branch. Some features documented here may not yet be available in the latest release. Check out the docs for the latest version, Metabase v0.55.
Troubleshooting notifications
Metabase is failing to send notifications like alerts or dashboard subscriptions.
Root cause:
When long running queries get stuck in the queue, they can block all other queries from running.
Steps to take:
- Increase the notification thread pool size with the
MB_NOTIFICATION_THREAD_POOL_SIZEenvironment variable and reboot the server.
For example, you can set the thread pool size to 10 by setting the environment variable:
MB_NOTIFICATION_THREAD_POOL_SIZE=10.
Note: remember that Metabase won’t pick up old failed tasks so you will see the effect of this change in the next notification period.
Read docs for other versions of Metabase.