alarm_handler
alarm when the regulator's valve is slow to
get match for an interval.
Behaviours: sbroker_meter.
Sets a SASL alarm_handler
alarm when the regulator's valve is slow to
get match for an interval. Once the valve becomes fast for an interval the
alarm is cleared.
sregulator_underload_meter
can be used in a sregulator
. Its argument is
of the form:
{Target :: integer(), Interval :: pos_integer(), AlarmId :: any()}
Target
is the target relative time of the valve in milliseconds. The
meter will set the alarm AlarmId
in alarm_handler
if the relative time of
the valve is above the target for Interval
milliseconds. Once set
if the relative time is below Target
for Interval
milliseconds the alarm
is cleared. The description of the alarm is {valve_slow, Pid}
where
Pid
is the pid()
of the process.
sregulator
because a sregulator_valve
will remain open when processes that should be available are not sending
requests and can not do anything to correct this. Whereas a sbroker
can
not distinguish between one queue receiving too many requests or the other
too few. In either situation the congested sbroker_queue
would drop
requests to correct the imbalance, causing a congestion alarm to be cleared
very quickly.Generated by EDoc, Sep 29 2016, 17:17:28.