Software diagram of the <a href="https://wikitech.wikimedia.org/wiki/Performance/Runbook/Arc_Lamp_service" class="extiw" title="wikitech:Performance/Runbook/Arc Lamp service">Arc Lamp</a> service as of December 2019, which collects stack traces from MediaWiki PHP on live web servers, and periodically generates trace logs and flame graphs.
<a href="//commons.wikimedia.org/wiki/User:Krinkle" title="User:Krinkle">Timo Tijhof</a>
2019-12-21
<span class="int-own-work" lang="en">Own work</span>