New plugins proposed

[gakhov]

There are 2 more plugins we use in production in our company;

• elasticsearch plugin for query execution time monitoring.
  • ElasticSearch (http://www.elasticsearch.org/) has a good API, so I just do HTTP query "get all" and parse its execution time from the response (note, that ES can cache the query, but that is not a problem since if we have general slowness, then even cached queries are slow)
• elasticsearch plugins for garbage collections monitoring.
• elasticsearch plugin for monitoring open http connection to elasticsearch node.
• elasticsearch plugin for monitoring open files by elasticsearch.
• elasticsearch plugin for monitoring JVM memory pools (young and old generations).
• elasticsearch plugin for monitoring OS memory (free memory, actual free memory, used memory, actual used memory, swap used, swap free).
• storm topology processed items plugin
  • Storm (https://github.com/nathanmarz/storm) doesn't have API, so the only way to be informed that's going on, is to parse data from it's web interface.