magento2 – What is max_messages proper value for running message queue using cron job?

I’m using Magento 2.4.1, and this is my message queue configuration in app/etc/env.php

'queue' => [
    'consumers_wait_for_messages' => 0
],
'cron_consumers_runner' => [
    'cron_run' => true,
    'max_messages' => 2,
    'single_thread' => true,
    'consumers-wait-for-messages' => 0,
    'consumers' => [
        'product_action_attribute.update',
        'product_action_attribute.website.update',
        'exportProcessor'
    ]
]

I set the max_messages to 2 , I don’t know if this is enough or gonna cause any trouble later