Hi,
Please use english language if possible, we cannot guarantee translating from spanish.
There is no upper limit of how many posts the plugin can index, it depends on the database only. We are regularly testing on tables with over 100 000 posts and 10 million keywords without issues. I suspect that there might be a size limit for your mysql tables, and adding new items is no longer possible.
The index size is reported to be 0, but it is actually not 0 – only the request that tries to get the size is not responding. The table must have grown so big, that the server is not able to request the table size.
If there is a table limit, row limit or anything else, I would recommend increasing that. It is also possible that there is some sort of table limit size if you are using a shared host provider, you might want to ask them, if it’s the case.
Since there are plenty of posts, I would recommend a few additional measures to decrease the index size greatly:
1. Indexing the content with that amount of posts is almost redundant, first I would recommend disabling that first: https://i.imgur.com/NS3J2ws.png
2. Increasing the keyword size to 4, because the most useful keywords are 4 or higher in lenght in your case: https://i.imgur.com/fBqbd05.png
It will help you decreasing the index table size greatly – however I still recommend checking table size limits, to make sure it’s not conflicting.