Reduce Database load caused by Jetpack

jetpack.php

<?php
// Jetpack custom cron schedule to reduce cron load
// Add it in your site-speicic plugin or the theme's functions.php
add_filter( 'jetpack_sync_incremental_sync_interval', function() { return 'hourly'; } );
add_filter( 'jetpack_sync_full_sync_interval', function() { return 'daily'; } );
add_filter( 'jetpack_sync_listener_should_load', '__return_false' );
add_filter( 'jetpack_sync_sender_should_load', '__return_false' );
add_filter( 'pre_option_jetpack_sync_settings_sync_via_cron', '__return_zero' );