commit | a842f3bc662ccd35aed5214dc6b34e4796aad553 | [log] [tgz] |
---|---|---|
author | ILYA Khlopotov <iilyak@ca.ibm.com> | Thu Jul 23 13:09:35 2015 -0700 |
committer | ILYA Khlopotov <iilyak@ca.ibm.com> | Thu Jul 23 13:09:35 2015 -0700 |
tree | 7030616270b38467a10b3bc4f7c3e33ae20a8031 | |
parent | c4039dd69001b6302af54287cf928b61978c674a [diff] |
Use `chttpd:qs` instead of `couch_httpd:qs`
couch_stats is a simple statistics collection app for Erlang applications. Its core API is a thin wrapper around a stat storage library (currently Folsom,) but abstracting over that library provides several benefits:
All references to stat storage are in one place, so it's easy to swap the module out.
Some common patterns, such as tying a process's lifetime to a counter value, are straightforward to support.
Configuration can be managed in a single place - for example, it's much easier to ensure that all histogram metrics use a 10-second sliding window if those metrics are instantiated/configured centrally.
[atom()]
.counter
, gauge
, or histogram
.If you don‘t add your metric to a description file, your metric will be accessible via couch_stats:sample/1
, but it won’t be read by the stats collector and therefore won't be available to HTTP _stats
requests, etc.
Tell couch_stats to use your description file via application configuration.
Instrument your code with the helper functions in couch_stats.erl
.