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Incident documentation/2021-09-26 appserver latency: Revision history

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8 April 2022

20 October 2021

  • curprev 19:2319:23, 20 October 2021imported>Krinkle 947 bytes +947 Created page with "{{irdoc|status=review}} ==Summary== Increased db load for enwiki (s1) resulted in slower responses, which in turn resulted in overall php-fpm worker limits being reached and thus affecting requests for all wikis. For requests above the limit, the error was "''upstream connect error or disconnect/reset before headers. reset reason: overflow''". '''Impact''': For about 15 minutes, backend appservers were slower or unable to respond for all wikis. This mainly affected logg..."