[tahoe-lafs-trac-stream] [tahoe-lafs] #1392: if you have fewer than 1000 measurements, return None (meaning "I don't know") when asked for the 99.9% percentile.

[tahoe-lafs]

#1392: if you have fewer than 1000 measurements, return None (meaning "I don't
know") when asked for the 99.9% percentile.
-------------------------------+---------------------------
     Reporter:  arch_o_median  |      Owner:  arch_o_median
         Type:  defect         |     Status:  closed
     Priority:  minor          |  Milestone:  undecided
    Component:  code-storage   |    Version:  1.8.2
   Resolution:  fixed          |   Keywords:  reviewed
Launchpad Bug:                 |
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Changes (by wilcoxjg@…):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 In [5047/trunk]:
 {{{
 #!CommitTicketReference repository="trunk" revision="5047"
 server.py:  get_latencies now reports percentiles _only_ if there are
 sufficient observations for the interpretation of the percentile to be
 unambiguous.
 interfaces.py:  modified the return type of RIStatsProvider.get_stats to
 allow for None as a return value
 NEWS.rst, stats.py: documentation of change to get_latencies
 stats.rst: now documents percentile modification in get_latencies
 test_storage.py:  test_latencies now expects None in output categories
 that contain too few samples for the associated percentile to be
 unambiguously reported.
 fixes #1392
 }}}

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1392#comment:24>
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