﻿---
title: Hadoop metrics
description: The Hadoop system records a set of metric counters for each job that it runs. elasticsearch-hadoop extends on that and provides metrics about its activity...
url: https://www.elastic.co/elastic/docs-builder/docs/2652/reference/elasticsearch-hadoop/hadoop-metrics
products:
  - Elasticsearch
  - Elasticsearch for Apache Hadoop
---

# Hadoop metrics
The Hadoop system records a set of metric counters for each job that it runs. elasticsearch-hadoop extends on that and provides metrics about its activity for each job run by leveraging the Hadoop [Counters](http://hadoop.apache.org/docs/r3.3.1/api/org/apache/hadoop/mapred/Counters.html) infrastructure. During each run, elasticsearch-hadoop sends statistics from each task instance, as it is running, which get aggregated by the Map/Reduce infrastructure and are available through the standard Hadoop APIs.
elasticsearch-hadoop provides the following counters, available under `org.elasticsearch.hadoop.mr.Counter` enum:

| Counter name               | Purpose                                                                         |
|----------------------------|---------------------------------------------------------------------------------|
| Data focused               |                                                                                 |
| BYTES_SENT                 | Total number of data/communication bytes sent over the network to Elasticsearch |
| BYTES_ACCEPTED             | Data/Documents accepted by Elasticsearch in bytes                               |
| BYTES_RETRIED              | Data/Documents rejected by Elasticsearch in bytes                               |
| BYTES_RECEIVED             | Data/Documents received from Elasticsearch in bytes                             |
| Document focused           |                                                                                 |
| DOCS_SENT                  | Number of docs sent over the network to Elasticsearch                           |
| DOCS_ACCEPTED              | Number of documents sent and accepted by Elasticsearch                          |
| DOCS_RETRIED               | Number of documents sent but rejected by Elasticsearch                          |
| DOCS_RECEIVED              | Number of documents received from Elasticsearch                                 |
| Network focused            |                                                                                 |
| BULK_TOTAL                 | Number of bulk requests made to Elasticsearch                                   |
| BULK_RETRIES               | Number of bulk retries (caused by document rejections)                          |
| SCROLL_TOTAL               | Number of scroll pulled from Elasticsearch                                      |
| NODE_RETRIES               | Number of node fall backs (caused by network errors)                            |
| NET_RETRIES                | Number of network retries (caused by network errors)                            |
| Time focused               |                                                                                 |
| NET_TOTAL_TIME_MS          | Overall time (in ms) spent over the network                                     |
| BULK_TOTAL_TIME_MS         | Time (in ms) spent over the network by the bulk requests                        |
| BULK_RETRIES_TOTAL_TIME_MS | Time (in ms) spent over the network retrying bulk requests                      |
| SCROLL_TOTAL_TIME_MS       | Time (in ms) spent over the network reading the scroll requests                 |

One can use the counters programatically, depending on the API used, through [mapred](http://hadoop.apache.org/docs/r3.3.1/api/index.html?org/apache/hadoop/mapred/Counters.md) or [mapreduce](http://hadoop.apache.org/docs/r3.3.1/api/index.html?org/apache/hadoop/mapreduce/Counter.md). Whatever the choice, elasticsearch-hadoop performs automatic reports without any user intervention. In fact, when using elasticsearch-hadoop one will see the stats reported at the end of the job run, for example:
```bash
13:55:08,100  INFO main mapreduce.Job - Job job_local127738678_0013 completed successfully
13:55:08,101  INFO main mapreduce.Job - Counters: 35
...
Elasticsearch Hadoop Counters
    Bulk Retries=0
    Bulk Retries Total Time(ms)=0
    Bulk Total=20
    Bulk Total Time(ms)=518
    Bytes Accepted=159129
    Bytes Sent=159129
    Bytes Received=79921
    Bytes Retried=0
    Documents Accepted=993
    Documents Sent=993
    Documents Received=0
    Documents Retried=0
    Network Retries=0
    Network Total Time(ms)=937
    Node Retries=0
    Scroll Total=0
    Scroll Total Time(ms)=0
```