blocks.meter
Instrumentation for block stores to measure data flows, call latencies, and other metrics.
The logic in this namespace is built around the notion of a metric event and
an associated recording function on the store which the events are passed
to. Each event has at least a namespaced :type keyword, a :label
associated with the store, and a numeric :value.
Events may contain other information like the block id or method name as well, and it is up to the receiver to interpret them.
Instrumentation for block stores to measure data flows, call latencies, and other metrics. The logic in this namespace is built around the notion of a _metric event_ and an associated _recording function_ on the store which the events are passed to. Each event has at least a namespaced `:type` keyword, a `:label` associated with the store, and a numeric `:value`. Events may contain other information like the block id or method name as well, and it is up to the receiver to interpret them.
*io-report-period*clj
Record incremental IO metrics every N seconds.
Record incremental IO metrics every N seconds.
measure-methodcljmacro
(measure-method store method-kw attrs & body)Measure the end-to-end elapsed time for a block store method. Returns the
result of calling body-fn after measurement if the store has metering
enabled.
Measure the end-to-end elapsed time for a block store method. Returns the result of calling `body-fn` after measurement if the store has metering enabled.
measure-method*clj
(measure-method* store method-kw attrs body-fn)Internal helper for measure-method.
Internal helper for `measure-method`.
metered-blockclj
(metered-block store metric-type block)Wrap the block with a lazy constructor for a metered input stream which will report metrics for the given type. If the store does not have a recorder, the block will be returned unchanged.
Wrap the block with a lazy constructor for a metered input stream which will report metrics for the given type. If the store does not have a recorder, the block will be returned unchanged.
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