NAME

       "IO::Async::Metrics" - report metrics about "IO::Async" to "Metrics::Any"

DESCRIPTION

       This module contains the implementation of metrics-reporting code from "IO::Async" to
       provide information about its operation into Metrics::Any.

METRICS

       The following metrics are reported:

   io_async_forks
       A counter giving the number of times that fork(2) has been called by the IO::Async::Loop.

   io_async_notifiers
       A gauge giving the number of IO::Async::Notifiers currently registered with the Loop.

   io_async_processing
       A time distribution giving the amount of time spent processing IO events. This time does
       not include the time spent blocking on the underlying kernel system call to wait for IO
       events, but only the time spent in userland afterwards to handle them.

   io_async_resolver_lookups
       A labelled counter giving the number of attempted lookups by the IO::Async::Resolver.

       This metric has one label, "type", containing the type of lookup; e.g. "getaddrinfo".

   io_async_resolver_failures
       A labelled counter giving the number of Resolver lookups that failed. This is labelled as
       for "io_async_resolver_lookups".

   io_async_stream_read
       A counter giving the number of bytes read by IO::Async::Stream instances.  Note that for
       SSL connections, this will only be able to count bytes of plaintext, not ciphertext, and
       thus will be a slight under-estimate in this case.

   io_async_stream_written
       A counter giving the number of bytes written by Stream instances. Note again for SSL
       connections this will only be able to count bytes of plaintext.

AUTHOR

       Paul Evans <leonerd@leonerd.org.uk>