Popular Search Terms Magento\Config\Model\Config\Source\Enabledisable Catalog Search Magento\CatalogSearch\Model\Adminhtml\System\Config\Backend\Engine If not specified, Default Search Engine will be used. Minimal Query Length validate-digits This value must be compatible with the corresponding setting in the configured search engine. Be aware: a low query length limit may cause the performance impact. Maximum Query Length validate-digits This value must be compatible with the corresponding setting in the configured search engine. Number of top search results to cache Number of popular search terms to be cached for faster response. Use “0” to cache all results after a term is searched for the second time. validate-digits Autocomplete Limit validate-digits Enable EAV Indexer Enable/Disable Product EAV indexer to improve indexation speed. Make sure that indexer is not used by 3rd party extensions. mysql Magento\Config\Model\Config\Source\Yesno