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Diffstat (limited to 'source/rainerscript/functions/rs-percentile_observe.rst')
| -rw-r--r-- | source/rainerscript/functions/rs-percentile_observe.rst | 33 |
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diff --git a/source/rainerscript/functions/rs-percentile_observe.rst b/source/rainerscript/functions/rs-percentile_observe.rst new file mode 100644 index 0000000..40bc81f --- /dev/null +++ b/source/rainerscript/functions/rs-percentile_observe.rst @@ -0,0 +1,33 @@ +******************** +percentile_observe() +******************** + +Purpose +======= + +percentile_observe(bucket_name_literal_string, stats_name_literal_string, value) + +Adds an observation, identified by the ``bucket_name_literal_string`` +and ``stats_name_literal_string``, to the observation set. + +Periodically, on an **impstats** reporting interval, percentile and summary metrics are generated +based on the statistics collected. + +Except for special circumstances (such as memory allocation failing etc), +observe calls may fail due to stat-name cardinality being under-estimated. +Bucket is configured to support a maximum cardinality (to prevent abuse) +and it rejects observe-operation if it encounters a new(previously unseen) +stat-name(``str``) when full. + +**Read more about it here** :doc:`Percentile Stats<../../configuration/percentile_stats>` + + +Example +======= + +In the following example, the ``$msg_count`` value is being recorded as a ``msg_per_host`` statistic in the ``host_statistics`` bucket. + + +.. code-block:: none + + percentile_observe("host_statistics", "msg_per_host", $msg_count) |