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# 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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