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aggregate-metric-logger
Advanced tools
Readme
aggregate metrics in memory and log them every minute
Set METRIC_LOGGER_ENABLED
env variable to true
for aggregate-metric-logger to
start collecting and logging measuremnts.
To change the default aggregate-metric-logger
namespace used for logs, set
METRIC_LOGGER_NAMESPACE
to a custom value.
The package exposes similar logging methods as the @emartech/json-logger
package:
trace
, debug
, info
, warn
, error
and fatal
.
When these are called, it will aggregate logs with the same parameters withing a minute, add
an extra count
property to the logs and log them at the end of the minute with
@emartech/json-logger
.
const metrictLogger = require('aggregate-metric-logger')
metricLogger.warn('etwas-went-wrong', { customer_id: 11 });
metricLogger.warn('etwas-went-wrong', { customer_id: 11 });
// will aggrete these to a single warning log
If you want aggregate measuremts about something you need to simply call the measure
method
for each value:
const metrictLogger = require('aggregate-metric-logger')
metricLogger.measure('thing-to-measure', 14)
metricLogger.measure('thing-to-measure', 20)
Every minute metric logger will log min
, max
, sum
, count
and average
aggregated metrics
for each measured tags. (Uses @emartech/json-logger
behind the scenes for logging).
For duration measuremts, there are two convinience methods: start
, and stop
;
You start the measurement with start
, the counted value for aggregation will be the duration
between this start
and the matcing stop
call;
function exampleIOHeavyFunction() {
const measurementId = metricLogger.start('tag-for-the-measuement');
const result = db.findItems();
metricLogger.stop(measurementId);
return result;
}
If you want to group by additional parameters inside a tag, you can pass down these extra
params in an object to count
and start
as the last optional argument:
metricLogger.count('thing-to-count', 14, { customer_id: 12 });
const measurementId = metricLogger.start(
'tag-for-the-measuement',
{ event_type: 'nyul', account: 3 }
);
A separete log entry will be created for each seen value combinations seen in the extra params and these extra params will appended to the log entry.
Be very carefull when using extra params, and only include information you really need. If you include too many parameters, you could loose the advantage you gain by aggregating your logs with this package.
FAQs
aggregate metrics in memory for logging
The npm package aggregate-metric-logger receives a total of 1 weekly downloads. As such, aggregate-metric-logger popularity was classified as not popular.
We found that aggregate-metric-logger demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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