Hi Analytics, Next Tuesday, Dec 15, between 10:00 and 12:00 UTC EventLogging's database m4-master will be down for maintenance. Impact of the outage: - Events generated during the mentioned time window will wait until the outage is over to be inserted in the m4-master database. These events and the ones generated immediately after the outage can take a couple hours to catch up and be inserted. Everything else should work as normal during the outage: - Events can be sent normally to EventLogging server, they'll be buffered in Kafka. - Events will be written to the logs, and forwarded to other systems normally. The only process that will stop is the mysql-consumer. - Queries to analytics-store can be executed normally. The outage is local to m4-master and does not affect replicas. Feel free to ask any questions you have on this. Cheers! -- *Marcel Ruiz Forns* Analytics Developer Wikimedia Foundation