Hello!

Yesterday around 21:43 UTC we experienced a slowdown of Elasticsearch. In short, one of our elasticsearch server went crazy with its garbage collector and had to be restarted.

You can find more details in the incident report [1] or the corresponding Phabricator task [2].

Thank you all for your understanding!

Guillaume

[1] https://wikitech.wikimedia.org/wiki/Incident_documentation/20160509-CirrusSe... [2] https://phabricator.wikimedia.org/T134829