# elasticsearch

This module monitors 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

## configuration

Sample:

```yaml
local:
  host               : 'ipaddress'    # Elasticsearch server ip address or hostname
  port               : 'port'         # Port on which elasticsearch listens
  cluster_health     :  True/False    # Calls to cluster health elasticsearch API. Enabled by default.
  cluster_stats      :  True/False    # Calls to cluster stats elasticsearch API. Enabled by default.
```

If no configuration is given, module will fail to run.

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