# memory

The `memory` buffer plugin provides a fast buffer implementation. It uses memory to store buffer chunks. When Fluentd is shut down, buffered logs that can't be written quickly are deleted.

## Example Config

```
<match pattern>
  buffer_type memory
</match>
```

Please see the [Config File](https://docs.fluentd.org/0.12/configuration/config-file) article for the basic structure and syntax of the configuration file.

## Parameters

### buffer\_type (required)

The value must be `memory`.

### buffer\_chunk\_limit

The size of each buffer chunk. The default is 8m. The suffixes "k" (KB), "m" (MB), and "g" (GB) can be used. Please see the [Buffer Plugin Overview](https://docs.fluentd.org/0.12/buffer) article for the basic buffer structure.

### buffer\_queue\_limit

The length limit of the chunk queue. Please see the [Buffer Plugin Overview](https://docs.fluentd.org/0.12/buffer) article for the basic buffer structure. The default limit is 64 chunks.

### flush\_interval

The interval between data flushes. The suffixes "s" (seconds), "m" (minutes), and "h" (hours) can be used

### flush\_at\_shutdown

If true, queued chunks are flushed at shutdown process. The default is `true`. If false, queued chunks are discarded unlike `buf_file`.

### retry\_wait

The interval between retries. The suffixes "s" (seconds), "m" (minutes), and "h" (hours) can be used.

If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is a open source project under [Cloud Native Computing Foundation (CNCF)](https://cncf.io/). All components are available under the Apache 2 License.