Upgrade procedure performance issues

Bug #1772988 reported by Romain LE DISEZ on 2018-05-23
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OpenStack Identity (keystone)

Bug Description

1. Some upgrade procedures work on each projects/users rows, one by one. This is really slower than working on batches of rows.

2. Some upgrade procedures work on all rows in a single requests. This does not work with Galera because of max transaction size (https://www.percona.com/blog/2015/10/26/how-big-can-your-galera-transactions-be/)

See https://etherpad.openstack.org/p/YVR-rocky-keystone-feedback

Fix proposed to branch: master
Review: https://review.openstack.org/570247

Changed in keystone:
assignee: nobody → Romain LE DISEZ (rledisez)
status: New → In Progress
Changed in keystone:
importance: Undecided → Medium
tags: added: sql
tags: added: performance
Changed in keystone:
milestone: none → rocky-rc1

Change abandoned by Romain LE DISEZ (<email address hidden>) on branch: master
Review: https://review.opendev.org/570247
Reason: Outdated. It was for Keystone 11.

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