---
layout: default
title: Bounded blocking
parent: Buffers
grand_parent: Pipelines
nav_order: 50
# Bounded blocking
## Overview
The default buffer. Memory-based.
Option | Required | Type | Description
:--- | :--- | :--- | :---
buffer_size | No | Integer | The maximum number of records the buffer accepts. Default is `12800`.
batch_size | No | Integer | The maximum number of records the buffer drains after each read. Default is `200`.
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## Metrics
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