Here Explain how to handle reindex using command line in magento2. In root magento directory [sourcecode language="plain"]php bin/magento indexer:reindex[/sourcecode]   in root/bin directory [sourcecode language="plain"]php magento indexer:reindex[/sourcecode]   To get the index name to run index one by one first write below command to get info in magento root directory [sourcecode language="plain"]php bin/magento indexer:info[/sourcecode]   To run single reindexing command [sourcecode language="plain"]php bin/magento indexer:reindex indexer_name[/sourcecode]   indexer name which we received name from indexer:info   [JWD-Magento-Development]