Chris Earle 2d8a140ed8 Add file descriptor details to cat/nodes
cat/nodes currently does not report any details related to file descriptors. This adds the current number in use, the maximum number available as well as their ratio (percentage) to cat/nodes as hidden-by-default metrics. In addition, this also adds current heap usage (as a non-percentage of ts max) and ram usage (as a non-percerntage of its max) to allow tools to provide more granularity.

Closes #7652
2014-10-15 10:18:41 -05:00
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