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[Alexander Makarov <amakarov@xxxxxxxxxxxx>]

Public bug reported:

Current memcache lock's polling interval calculation locks execution for too long.
In concurrent environment when distributed locking is actively used the chance of 8 subsequent lock collisions is high enough to begin failing authorisation due to timeout.

** Affects: keystone
     Importance: Undecided
         Status: New


** Tags: performance

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https://bugs.launchpad.net/bugs/1395688

Title:
  Memcache distributed lock ruins HA

Status in OpenStack Identity (Keystone):
  New

Bug description:
  Current memcache lock's polling interval calculation locks execution for too long.
  In concurrent environment when distributed locking is actively used the chance of 8 subsequent lock collisions is high enough to begin failing authorisation due to timeout.

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