You are browsing a read-only backup copy of Wikitech. The live site can be found at

Incident documentation/2021-09-18 appserver latency

From Wikitech-static
< Incident documentation
Revision as of 19:13, 20 October 2021 by imported>Krinkle
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

document status: in-review


Slow database queries resulted in php-fpm worker exhaustion.

Impact: For about 10 minutes, backends were slow or unavailable for all wikis. This affected logged-in users, most bots/API queries, and some page views from unregistered users (pages that were recently edited or otherwise expired from the CDN cache).