We usually reindex everithing every hour and once a day reindex fail and put the website unusable (ALL BLANK PAGES).
We have a db that allow max 30 connections and WE CAN'T INCREASE THAT VALUE.
Thi is log error
We have the same website duplicated in another server with less power and the reindex work perfectly every hour.
We are currently using Magento ver. 2.3.5-p1
Thanks for the answare