Avilable plugins as of 4-14-2014 did not work with solr1.4. My plugin gathers same metrics as Pete Shima's plugins.
Differences are I used nokogiri and CSS selectors to parse the XML.

Allowing users to dynamically locate metrics and stats I feel work quite well in my plugin.
Add a new cpu_count metric with number of CPUs
fixed format issues per Travis ci instruction
Reduced length of line for readability
Merge pull request #549 from mac-flanker/master

Avilable plugins as of 4-14-2014 did not work with solr1.4. My plugin ga...
Merge pull request #560 from jaimegago/master

Add a new cpu_count metric with number of CPUs