---
title: Telegraf Documentation
description: Telegraf plugin for aggregating metrics using Merge
url: https://docs.influxdata.com/telegraf/v1/aggregator-plugins/merge/
estimated_tokens: 922
product: Telegraf
version: v1
---

-   Telegraf v1.13.0+

# Merge Aggregator Plugin

This plugin merges metrics of the same series and timestamp into new metrics with the super-set of fields. A series here is defined by the metric name and the tag key-value set.

Use this plugin when fields are split over multiple metrics, with the same measurement, tag set and timestamp.

**Introduced in:** Telegraf v1.13.0 **Tags:** transformation **OS support:** all

## Global configuration options

Plugins support additional global and plugin configuration settings for tasks such as modifying metrics, tags, and fields, creating aliases, and configuring plugin ordering. See [CONFIGURATION.md](/telegraf/v1/configuration/#plugins) for more details.

## Configuration

```toml
# Merge metrics into multifield metrics by series key
[[aggregators.merge]]
  ## General Aggregator Arguments:
  ## The period on which to flush & clear the aggregator.
  # period = "30s"

  ## Precision to round the metric timestamp to
  ## This is useful for cases where metrics to merge arrive within a small
  ## interval and thus vary in timestamp. The timestamp of the resulting metric
  ## is also rounded.
  # round_timestamp_to = "1ns"

  ## If true, the original metric will be dropped by the
  ## aggregator and will not get sent to the output plugins.
  drop_original = true
```

## Example

```diff
- cpu,host=localhost usage_time=42 1567562620000000000
- cpu,host=localhost idle_time=42 1567562620000000000
+ cpu,host=localhost idle_time=42,usage_time=42 1567562620000000000

```

#### Related

-   [Configure plugins](/telegraf/v1/configure_plugins/)
-   [Merge Plugin Source](https://github.com/influxdata/telegraf/tree/v1.38.4/plugins/aggregators/merge/README.md)