keystone/releasenotes/notes/bug-1524030-ccff6b0ec9d1cbf2.yaml
“Richard 9e84371461 Improve check_token validation performance
This patch improves check_token validation performance by only pulling
revocation events based on the token issued_at value, taking advantage
of the table index. In this way, only a subset of relevant events will
be returned for validation.

Benchmarks can be seen at [1], but included here as well:

Time per Request for Old Method
-------------------------------
10 revokes at 7.908
100 revokes at 18.224
1,000 revokes at 110.155
10,000 revokes at 1998.220

Time per Request New Method
---------------------------
10 revokes at 17.636ms,
100 revokes at 17.279ms,
1,000 revokes at 17.370,
10,000 revokes w/all revokes issued before token at 17.263 (best case)
10,000 revokes w/all revokes after token creation 44.934ms (worst case)

[1] https://gist.github.com/csrichard1/4b7b8527ee5a6565a84956cff33cf29b

Change-Id: I9c2f067d870d542ec5909eaf8b24ded07b75f433
Partial-Bug: 1524030
2016-10-13 15:39:54 +00:00

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---
fixes:
- >
[`bug 1524030 <https://bugs.launchpad.net/keystone/+bug/1524030>`_]
During token validation we've reduced the number of revocation events
returned, only returning a subset of events relevant to the token. Thus,
improving overall token validation performance.
other:
- >
The revoke backend driver interface has changed. We've added a token
parameter to the ``list_events`` method in order to improve performance by
reducing the number of revocation events returned during token validation.