gitlab-org--gitlab-foss/changelogs/unreleased/sh-optimize-merge-request-project-lookup.yml

---
title: Reduce SQL queries needed to load open merge requests
merge_request: 22709
author:
type: performance
Reduce SQL queries needed to load open merge requests The SQL queries and memory allocation in MergeRequests::RefreshService is dominated by queries for Project and Route loads. On staging, the absence of an inverse relationship caused Rails to make over 1100 extraneous SQL queries for the www-gitlab-com repository. Relates to https://gitlab.com/gitlab-org/gitlab-ce/issues/49703 2018-10-30 19:41:49 -04:00			`---`
			`title: Reduce SQL queries needed to load open merge requests`
			`merge_request: 22709`
			`author:`
			`type: performance`