We no longer ship the Sigar library for operating system dependent statistics, as it no longer seems to be maintained. Instead, we rely on the statistics provided by the JVM. This has resulted in a number of changes to the node info, and node stats responses:
network.*has been removed from nodes info and nodes stats.
fs.*.disk*have been removed from nodes stats.
os.*has been removed from nodes stats, except for
os.swap.totalhave been removed from nodes info.
process.mem.sharehave been removed from node stats.
id_cache metric from nodes stats, indices stats and cluster stats
apis. This metric has also been removed from the shards cat, indices cat and
nodes cat apis. Parent/child memory is now reported under fielddata, because
it has internally been using fielddata for a while now.
To just see how much parent/child related field data is taking, the
fielddata_fields option can be used on the stats apis. Indices stats
The total time spent running percolator queries is now called
The cluster state API doesn’t return the
routing_nodes section anymore when
routing_table is requested. The newly introduced
routing_nodes flag can be
used separately to control whether
routing_nodes should be returned.
The deprecated index status API has been removed.
Queue lengths are now reported as basic numeric so they can easily processed by code. Before we used a human
readable format. For example, a queue with 1,000 items is now reported as
1000 instead of