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add 1%,10% percentiles to the storage server latency output

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This commit is contained in:
Brian Warner 2008-07-11 21:34:36 -07:00
parent f303670265
commit bffe14ef3e
1 changed files with 6 additions and 4 deletions
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10
src/allmydata/storage.py
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@ -821,10 +821,10 @@ class StorageServer(service.MultiService, Referenceable):
def get_latencies(self):
"""Return a dict, indexed by category, that contains a dict of
latency numbers for each category. Each dict will contain the
following keys: mean, median, 90_percentile, 95_percentile,
99_percentile). If no samples have been collected for the given
category, then that category name will not be present in the return
value."""
following keys: mean, median, 1_percentile, 10_percentile,
90_percentile, 95_percentile, 99_percentile, 999_percentile. If no
samples have been collected for the given category, then that
category name will not be present in the return value."""
# note that Amazon's Dynamo paper says they use 99.9% percentile.
output = {}
for category in self.latencies:
@ -835,6 +835,8 @@ class StorageServer(service.MultiService, Referenceable):
samples.sort()
count = len(samples)
stats["mean"] = sum(samples) / count
stats["1_percentile"] = samples[int(0.01 * count)]
stats["10_percentile"] = samples[int(0.1 * count)]
stats["median"] = samples[int(0.5 * count)]
stats["90_percentile"] = samples[int(0.9 * count)]
stats["95_percentile"] = samples[int(0.95 * count)]