[mysqld]
max_allowed_packet=32M
query_cache_size=128M
join_buffer_size=4M
tmp_table_size=92M
max_heap_table_size=92M
sort_buffer_size=4M
https://github.com/thinktandem/migrate_booster
$config['migrate_booster.settings']['modules'] = [
'admin_toolbar_tools',
'autosave_form',
'pathauto',
'search_api',
'search_api_solr',
'xmlsitemap',
];