magento-test/app/code/Magento/ImportExport/etc/config.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
    <default>
        <general>
            <file>
                <importexport_local_valid_paths>
                    <available>
                        <export_xml>var/export/*/*.xml</export_xml>
                        <export_csv>var/export/*/*.csv</export_csv>
                        <import_xml>var/import/*/*.xml</import_xml>
                        <import_csv>var/import/*/*.csv</import_csv>
                    </available>
                </importexport_local_valid_paths>
                <bunch_size>100</bunch_size>
                <import_images_base_dir>var/import/images</import_images_base_dir>
            </file>
        </general>
        <import>
            <format_v1>
                <page_size>5000</page_size>
            </format_v1>
            <format_v2>
                <page_size>10000</page_size>
                <bunch_size>100</bunch_size>
            </format_v2>
        </import>
    </default>
</config>