When i try to rebuild the search, i get the page the refreshes

All posts up to post id 1300 have now been indexed, of which 823 posts were within this step.
The current rate of indexing is approximately 31.6 posts per second.
Indexing in progress…

the 1300 will change from 1200-1600 , i got around 70K posts on my website and i give it 5 hours to see if it would do anything and it just keep on running.