How to enable notify-keyspace-events on Redis

Issue

I would like to use Redis Notification feature, but I get an error message "(error) ERR unknown command 'config'".

Resolution

You can enable and config Redis to use keyspace notifications via the CLI. For example,

heroku redis:keyspace-notifications REDIS_URL -c 'AKE' -a your-app-name

where the string following -c is used to set the config options. In the above example, 'AKE' means enabling keyspace notifications for all events except for key miss events.

You can run heroku redis:keyspace-notifications --help to see descriptions of all the config options. These are the same config options as shown in the official open-source Redis docs. See Heroku CLI Commands for more info.

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