"help()"

    say $e->cat->help;

Returns the list of supported "cat" APIs

"aliases()"

    say $e->cat->aliases(
        name => 'name' | \@names    # optional
    );

Returns information about index aliases, optionally limited to the specified index/alias names.

Query string parameters: "h", "help", "local", "master_timeout", "v"

See the cat aliases docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-aliases.html> for more information.

"allocation()"

    say $e->cat->allocation(
        node_id => 'node' | \@nodes    # optional
    );

Provides a snapshot of how shards have located around the cluster and the state of disk usage.

Query string parameters: "bytes", "h", "help", "local", "master_timeout", "v"

See the cat allocation docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-allocation.html> for more information.

"count()"

    say $e->cat->count(
        index => 'index' | \@indices    # optional
    );

Provides quick access to the document count of the entire cluster, or individual indices.

Query string parameters: "h", "help", "local", "master_timeout", "v"

See the cat count docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-count.html> for more information.

"fielddata()"

    say $e->cat->fielddata(
        fields => 'field' | \@fields    # optional
    );

Shows the amount of memory used by each of the specified `fields` (or all fields) loaded into fielddata.

Query string parameters: "bytes", "h", "help", "local", "master_timeout", "v"

See the cat fielddata docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-fielddata.html> for more information.

"health()"

    say $e->cat->health();

Provides a snapshot of how shards have located around the cluster and the state of disk usage.

Query string parameters: "bytes", "h", "help", "local", "master_timeout", "ts", "v"

See the cat health docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-health.html> for more information.

"indices()"

    say $e->cat->indices(
        index => 'index' | \@indices    # optional
    );

Provides a summary of index size and health for the whole cluster or individual indices

Query string parameters: "bytes", "h", "help", "local", "master_timeout", "pri", "v"

See the cat indices docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-indices.html> for more information.

"master()"

    say $e->cat->master();

Displays the master’s node ID, bound IP address, and node name.

Query string parameters: "h", "help", "local", "master_timeout", "v"

See the cat master docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-master.html> for more information.

"nodes()"

    say $e->cat->nodes();

Provides a snapshot of all of the nodes in your cluster.

Query string parameters: "h", "help", "local", "master_timeout", "v"

See the cat nodes docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-nodes.html> for more information.

"pending_tasks()"

    say $e->cat->pending_tasks();

Returns any cluster-level tasks which are queued on the master.

Query string parameters: "local", "master_timeout", "h", "help", "v"

See the cat pending-tasks docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-pending-tasks.html> for more information.

"plugins()"

    say $e->cat->plugins();

Returns information about plugins installed on each node.

Query string parameters: "local", "master_timeout", "h", "help", "v"

See the cat plugins docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-plugins.html> for more information.

"recovery()"

    say $e->cat->recovery(
        index => 'index' | \@indices    # optional
    );

Provides a is a view of shard replication. It will show information anytime data from at least one shard is copying to a different node. It can also show up on cluster restarts. If your recovery process seems stuck, try it to see if there’s any movement using "recovery()".

Query string parameters: "bytes", "h", "help", "master_timeout", "v"

See the cat recovery docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-recovery.html> for more information.

"segments()"

    say $e->cat->segments(
        index => 'index' | \@indices    # optional
    );

Provides low level information about the segments in the shards of an index.

Query string parameters: "h", "help", "v"

See the cat shards docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-segments.html> for more information.

"shards()"

    say $e->cat->shards(
        index => 'index' | \@indices    # optional
    );

Provides a detailed view of what nodes contain which shards, the state and size of each shard.

Query string parameters: "h", "help", "local", "master_timeout", "v"

See the cat shards docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-shards.html> for more information.

"thread_pool()"

    say $e->cat->thread_pool(
        index => 'index' | \@indices    # optional
    );

Shows cluster wide thread pool statistics per node. By default the "active", "queue" and "rejected" statistics are returned for the "bulk", "index" and "search" thread pools.

Query string parameters: "full_id", "h", "help", "local", "master_timeout", "v"

See the cat thread_pool docs <http://www.elastic.co/guide/en/elasticsearch/reference/current/cat-thread-pool.html> for more information.