Posts are not getting indexed

I have about 600,000 custom post type entries on my Japanese language sites. It's actually a dictionary site, and those 600,000 posts are dictionary entries and example sentences. A week ago, I found out that this plugin would work for such a large and complex dataset, so I installed it. I have four custom post types, and my requirement is to show four sets of related posts (from each post type) on each single entry. So, I wrote code like this:

function custom_yarpp_related_posts() {
ob_start();
?>
View Kanji Strokes

'kvg-info', 'limit' => 5, 'template' => 'list', 'order' => 'score DESC', )); ?> Related Kanji

'kanji-entry', 'limit' => 5, 'template' => 'list', 'order' => 'score DESC', )); ?> Related Words

'dictionary-entry', 'limit' => 5, 'template' => 'list', 'order' => 'score DESC', )); ?> Related Sentences

'example-sentence', 'limit' => 5, 'template' => 'list', 'order' => 'score DESC', )); ?>
<?php
return ob_get_clean();
}

function custom_yarpp_related_output($args) {
ob_start();
yarpp_related($args);
return ob_get_clean();
}

add_shortcode('custom_yarpp_related_posts', 'custom_yarpp_related_posts');

This way, I am showing related posts on each entry of my site. Also, I have set the indexing rate to the fastest in the Shareaholic settings, and the match threshold in the YARPP settings is set to 1.

But the problems I am facing are:

The Content Library section of Shareaholic is empty, so I am unable to see my indexed posts.
It's been about a week, and there are not enough related posts showing. Is this because not all posts are indexed yet? As there is nothing showing in the Content Library, I am unable to figure out what's wrong with it.
If all posts are not indexed yet, is it normal, and will they be indexed gradually? Is there any way to make it faster?
After adding the shortcode on the single page, the loading speed has become too slow. Is there anything I am missing?
Hoping for a very quick response. Thank you.