How to bulk re-index the whole site for core search? I have a website that has about 100,000 nodes.
In the core search page (admin/config/search/settings) it shows that:

There are 80801 items left to index.

It index 100 (or at most 500) nodes per cron run but it's useless.
I want to bulk index the whole site (all nodes) for core search.
How can I do that?
The Reindex and Batch indexing modules are created for this but there are only a few users use these modules and I couldn't be sure to use them. And also there is a module called Elysia Cron for modifying the cron per job but it's still useless for me because there are thousands of nodes to index.
(Note: I want to do this for core search not for other search solutions).
You can use the following drush command.

drush search-reindex --immediate --verbose