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*********
dyn_inc()
*********
Purpose
=======
dyn_inc(bucket_name_literal_string, str)
Increments counter identified by ``str`` in dyn-stats bucket identified
by ``bucket_name_literal_string``. Returns 0 when increment is successful,
any other return value indicates increment failed.
Counters updated here are reported by **impstats**.
Except for special circumstances (such as memory allocation failing etc),
increment may fail due to metric-name cardinality being under-estimated.
Bucket is configured to support a maximum cardinality (to prevent abuse)
and it rejects increment-operation if it encounters a new(previously unseen)
metric-name(``str``) when full.
**Read more about it here** :doc:`Dynamic Stats<../../configuration/dyn_stats>`
Example
=======
The following example shows the counter $hostname incremented in the bucket
msg_per_host.
.. code-block:: none
dyn_inc("msg_per_host", $hostname)
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