The indices command provides a cross-section of each index. This information spans nodes.

% curl 'localhost:9200/_cat/indices/twi*?v'
health index    pri rep docs.count docs.deleted store.size pri.store.size
green  twitter    5   1      11434            0       64mb           32mb
green  twitter2   2   0       2030            0      5.8mb          5.8mb

We can tell quickly how many shards make up an index, the number of docs, deleted docs, primary store size, and total store size (all shards including replicas).

Note: docs.count includes the count of nested documents. So if you have a single document with 2 associated nested documents, the docs.count will show 3.

Primariesedit

The index stats by default will show them for all of an index’s shards, including replicas. A pri flag can be supplied to enable the view of relevant stats in the context of only the primaries.

Examplesedit

Which indices are yellow?

% curl localhost:9200/_cat/indices | grep ^yell
yellow wiki     2 1  6401 1115 151.4mb 151.4mb
yellow twitter  5 1 11434    0    32mb    32mb

What’s my largest index by disk usage not including replicas?

% curl 'localhost:9200/_cat/indices?bytes=b' | sort -rnk7
green wiki     2 0  6401 1115 158843725 158843725
green twitter  5 1 11434    0  67155614  33577857
green twitter2 2 0  2030    0   6125085   6125085

How many merge operations have the shards for the wiki completed?

% curl 'localhost:9200/_cat/indices/wiki?pri&v&h=health,index,prirep,docs.count,mt'
health index docs.count mt pri.mt
green  wiki        9646 16     16