epriestley b5f7e9eec6 Reverse meaning of task priority column ... Summary: Ref T6615. Mixing ASC and DESC ordering on a multipart key makes it dramatically less effective (or perhaps totally ineffective). Reverse the meaning of the `priority` column so it goes in the same direction as the `id` column (both ascending, lower values execute sooner). Test Plan: - Queued 1.2M tasks with `bin/worker flood`. - Processed ~1 task/second with `bin/phd debug taskmaster` before patch. - Applied patch, took ~5 seconds for ~1.2M rows. - Processed ~100-200 tasks/second with `bin/phd debug taskmaster` after patch. - "Next in Queue" query on daemon page dropped from 1.5s to <1ms. Reviewers: btrahan Reviewed By: btrahan Subscribers: aklapper, 20after4, epriestley Maniphest Tasks: T6615 Differential Revision: https://secure.phabricator.com/D10895		2014-11-24 11:10:35 -08:00
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20141123.taskpriority.1.sql	Reverse meaning of task priority column	2014-11-24 11:10:35 -08:00
20141123.taskpriority.2.sql	Reverse meaning of task priority column	2014-11-24 11:10:35 -08:00