# elasticsearch

This module monitors [Elasticsearch](https://www.elastic.co/products/elasticsearch) performance and health metrics.

It produces:

1.  **Search performance** charts:

    -   Number of queries, fetches
    -   Time spent on queries, fetches
    -   Query and fetch latency

2.  **Indexing performance** charts:

    -   Number of documents indexed, index refreshes, flushes
    -   Time spent on indexing, refreshing, flushing
    -   Indexing and flushing latency

3.  **Memory usage and garbace collection** charts:

    -   JVM heap currently in use, committed
    -   Count of garbage collections
    -   Time spent on garbage collections

4.  **Host metrics** charts:

    -   Available file descriptors in percent
    -   Opened HTTP connections
    -   Cluster communication transport metrics

5.  **Queues and rejections** charts:

    -   Number of queued/rejected threads in thread pool

6.  **Fielddata cache** charts:

    -   Fielddata cache size
    -   Fielddata evictions and circuit breaker tripped count

7.  **Cluster health API** charts:

    -   Cluster status
    -   Nodes and tasks statistics
    -   Shards statistics

8.  **Cluster stats API** charts:

    -   Nodes statistics
    -   Query cache statistics
    -   Docs statistics
    -   Store statistics
    -   Indices and shards statistics

9.  **Indices** charts (per index statistics, disabled by default):

    -   Docs count
    -   Store size
    -   Num of replicas
    -   Health status

## configuration

Sample:

```yaml
local:
  host               : 'ipaddress'    # Elasticsearch server ip address or hostname.
  port               : 'port'         # Port on which elasticsearch listens.
  node_status        :  yes/no        # Get metrics from "/_nodes/_local/stats". Enabled by default.
  cluster_health     :  yes/no        # Get metrics from "/_cluster/health". Enabled by default.
  cluster_stats      :  yes/no        # Get metrics from "'/_cluster/stats". Enabled by default.
  indices_stats      :  yes/no        # Get metrics from "/_cat/indices". Disabled by default.
```

If no configuration is given, module will try to connect to `http://127.0.0.1:9200`.

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