class TxMetricsHistogram(BaseMetrics):
"""
A histogram measures the statistical distribution of values in a stream
of data. In addition to minimum, maximum, mean, etc., it also measures
median, 75th, 90th, 95th, 98th, 99th, and 99.9th percentiles.
"""
def __init__(self, appname, name, redis, timeout, unique_pid):
super(TxMetricsHistogram, self).__init__(appname, name, redis, timeout, unique_pid)
self._list_name = "retrics:histogram:%s:%s" % (self._appname, self._name)
self._e = Enum([])
@defer.inlineCallbacks
def update(self, val):
assert(type(val) is int or type(val) is float)
yield self._redis.lpush(self._list_name, val)
self._load_list()
def percentile(self, p):
"""
Percentile of the Histogram list
"""
assert(type(p) is float)
return self._e.percentile(p)
def standard_deviation(self):
"""
standard deviation of the Histogram list
"""
return self._e.standard_deviation()
def median(self):
"""
Median (50% Percentile) of the Histogram list
"""
return self._e.median()
def mean(self):
"""
Mean of the Histogram list
"""
return self._e.mean()
@defer.inlineCallbacks
def _load_list(self):
l = yield self._redis.lrange(self._list_name, 0, -1)
l = map(lambda x: float(x), l) #oh god why
self._e.reload(l)
@defer.inlineCallbacks
def reset(self):
yield self._redis.delete(self._list_name)
self._e = Enum([])
@defer.inlineCallbacks
def clear(self):
yield self.reset()
def clear(self):
self._redis.delete(self._list_name)
self._e = Enum([])
def reset(self):
self._redis.delete(self._list_name)
self._e = Enum(self._load_list())
def __init__(self, appname, name, redis, timeout):
super(RetricsHistogram, self).__init__(appname, name, redis, timeout)
self._list_name = "retrics:histogram:%s:%s" % (self._appname, self._name)
self._e = Enum(self._load_list())
def reset(self):
yield self._redis.delete(self._list_name)
self._e = Enum([])
def __init__(self, appname, name, redis, timeout, unique_pid):
super(TxMetricsHistogram, self).__init__(appname, name, redis, timeout, unique_pid)
self._list_name = "retrics:histogram:%s:%s" % (self._appname, self._name)
self._e = Enum([])
