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[Matt Fischer <matt@xxxxxxxxxxxxxxx>]

Public bug reported:

When enabled_emulation is enabled, the performance of Keystone suffers
greatly. I see a approx 4x slower result when it is enabled.  I
discussed this some in my blog post
(http://www.mattfischer.com/blog/?p=561) and was asked to file a bug by
Yuriy. Here are some results. Each query had about 20 results, but I've
removed them since it has private emails and what not.

enabled_emulation off:

root@j1:~# time keystone user-list
+--------------+--------------+---------+---------------------------+
|      id      |     name     | enabled |           email           |
+--------------+--------------+---------+---------------------------+
|    admin     |    admin     |   True  |                           |
...
+--------------+--------------+---------+---------------------------+

real	0m2.767s
user	0m0.380s
sys	0m0.284s


enabled_emulation on:

root@j1:~# time keystone user-list
+--------------+--------------+---------+---------------------------+
|      id      |     name     | enabled |           email           |
+--------------+--------------+---------+---------------------------+
|    admin     |    admin     |   True  |                           |
...
+--------------+--------------+---------+---------------------------+

real	0m9.099s
user	0m0.508s
sys	0m0.084s

Similar results happen for tenant enabled emulation.

My LDAP box is a Free IPA server running on CentOS if that matters.

I'm running Keystone 2013.2.2-0ubuntu1~cloud0

** Affects: keystone
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1299033

Title:
  enabled_emulation greatly reduces keystone performance

Status in OpenStack Identity (Keystone):
  New

Bug description:
  When enabled_emulation is enabled, the performance of Keystone suffers
  greatly. I see a approx 4x slower result when it is enabled.  I
  discussed this some in my blog post
  (http://www.mattfischer.com/blog/?p=561) and was asked to file a bug
  by Yuriy. Here are some results. Each query had about 20 results, but
  I've removed them since it has private emails and what not.

  enabled_emulation off:

  root@j1:~# time keystone user-list
  +--------------+--------------+---------+---------------------------+
  |      id      |     name     | enabled |           email           |
  +--------------+--------------+---------+---------------------------+
  |    admin     |    admin     |   True  |                           |
  ...
  +--------------+--------------+---------+---------------------------+

  real	0m2.767s
  user	0m0.380s
  sys	0m0.284s

  
  enabled_emulation on:

  root@j1:~# time keystone user-list
  +--------------+--------------+---------+---------------------------+
  |      id      |     name     | enabled |           email           |
  +--------------+--------------+---------+---------------------------+
  |    admin     |    admin     |   True  |                           |
  ...
  +--------------+--------------+---------+---------------------------+

  real	0m9.099s
  user	0m0.508s
  sys	0m0.084s

  Similar results happen for tenant enabled emulation.

  My LDAP box is a Free IPA server running on CentOS if that matters.

  I'm running Keystone 2013.2.2-0ubuntu1~cloud0

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