---
id: 7e0d897c-0d9a-4e4e-9227-865d592763bc
---
# High query load on ElasticSearch service
---

This incident type typically occurs when the number of queries currently in progress on an ElasticSearch service is high, leading to an increased query load. This can result in slower query response times and reduced system performance. It is important to investigate and resolve this issue to ensure optimal performance of the ElasticSearch service.

### Parameters
```shell
# Environment Variables

export NODE_NAME="PLACEHOLDER"

export INDEX_NAME="PLACEHOLDER"
```

## Debug

### Check if ElasticSearch service is running
```shell
systemctl status elasticsearch.service
```

### Check if ElasticSearch is listening on the correct port
```shell
netstat -tuln | grep 9200
```

### Check ElasticSearch query load
```shell
curl -X GET "http://localhost:9200}/_cat/thread_pool?v"
```

### Check ElasticSearch query performance
```shell
curl -X GET "http://localhost:9200/_cat/indices?v"
```

### Check ElasticSearch query logs
```shell
tail -n 100 /var/log/elasticsearch/${NODE_NAME}.log
```

### Check ElasticSearch cluster state
```shell
curl -X GET "http://localhost:9200/_cluster/state?pretty"
```

## Repair

### Stop ElasticSearch service
```shell
sudo systemctl stop elasticsearch
```

### Edit ElasticSearch configuration file to update number of shards and replicas
```shell
sed -i "s/number_of_shards: .*/number_of_shards: $NUM_SHARDS/g" $ES_CONFIG_FILE

sed -i "s/number_of_replicas: .*/number_of_replicas: $NUM_REPLICAS/g" $ES_CONFIG_FILE
```

### Start ElasticSearch service
```shell
sudo systemctl start elasticsearch
```

### Optimize the index
```shell
curl -XPOST 'http://localhost:9200/${INDEX_NAME}/_optimize?max_num_segments=1'
```


This incident type typically occurs when the number of queries currently in progress on an ElasticSearch service is high, leading to an increased query load. This can result in slower query response times and reduced system performance. It is important to investigate and resolve this issue to ensure optimal performance of the ElasticSearch service.


```shell
# Environment Variables

export NODE_NAME="PLACEHOLDER"

export INDEX_NAME="PLACEHOLDER"
```


### Check if ElasticSearch service is running

```shell
systemctl status elasticsearch.service
```

### Check if ElasticSearch is listening on the correct port

```shell
netstat -tuln | grep 9200
```

### Check ElasticSearch query load

```shell
curl -X GET "http://localhost:9200}/_cat/thread_pool?v"
```

### Check ElasticSearch query performance

```shell
curl -X GET "http://localhost:9200/_cat/indices?v"
```

### Check ElasticSearch query logs

```shell
tail -n 100 /var/log/elasticsearch/${NODE_NAME}.log
```

### Check ElasticSearch cluster state

```shell
curl -X GET "http://localhost:9200/_cluster/state?pretty"
```


### Stop ElasticSearch service

```shell
sudo systemctl stop elasticsearch
```

### Edit ElasticSearch configuration file to update number of shards and replicas

```shell
sed -i "s/number_of_shards: .*/number_of_shards: $NUM_SHARDS/g" $ES_CONFIG_FILE

sed -i "s/number_of_replicas: .*/number_of_replicas: $NUM_REPLICAS/g" $ES_CONFIG_FILE
```

### Start ElasticSearch service

```shell
sudo systemctl start elasticsearch
```

### Optimize the index

```shell
curl -XPOST 'http://localhost:9200/${INDEX_NAME}/_optimize?max_num_segments=1'
```


High query load on ElasticSearch service

Overview

Parameters

Debug

Check if ElasticSearch service is running

Check if ElasticSearch is listening on the correct port

Check ElasticSearch query load

Check ElasticSearch query performance

Check ElasticSearch query logs

Check ElasticSearch cluster state

Repair

Stop ElasticSearch service

Edit ElasticSearch configuration file to update number of shards and replicas

Start ElasticSearch service

Optimize the index

Learn more

Related Runbooks

Increase of the errors/second rate for Tomcat server

Postgresql high rate statement timeout incident.

Higher than usual 5xx Errors for NGINX

High error rate on NGINX incident

Product

Resources

Support

Company