indices command provides a cross-section of each index. This
information spans nodes.
% curl 'localhost:9200/_cat/indices/twi*?v' health status index pri rep docs.count docs.deleted store.size pri.store.size green open twitter 5 1 11434 0 64mb 32mb green open twitter2 2 0 2030 0 5.8mb 5.8mb
We can tell quickly how many shards make up an index, the number of docs at the Lucene level, including hidden docs (e.g., from nested types), deleted docs, primary store size, and total store size (all shards including replicas). All these exposed metrics come directly from Lucene APIs.
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.
Which indices are yellow?
% curl localhost:9200/_cat/indices | grep ^yell yellow open wiki 2 1 6401 1115 151.4mb 151.4mb yellow open 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 -rnk8 green open wiki 2 0 6401 1115 158843725 158843725 green open twitter 5 1 11434 0 67155614 33577857 green open twitter2 2 0 2030 0 6125085 6125085
How many merge operations have the shards for the
% 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
How much memory is used per index?
% curl 'localhost:9200/_cat/indices?v&h=i,tm' i tm wiki 8.1gb test 30.5kb user 1.9mb