Magerun
Quick Tip: Run multiple specific indexers
To reindex all indexers we have the index:reindex:all command.
In some cases it’s only needed to reindex only some indexers.
Since version 1.75.0 you can specify the indexer by code if you run pass index codes direct as argument:
$ n98-magerun.phar index:reindex catalog_product_attribute,tag_summary