Site performance , cache not working properly I am using the Performance Logging Module. Above screenshot, one strange thing I noticed that Insert Cache_bootstrap on every page. When you go to any page (both admin theme and frontend theme) Insert cache and then delete cache is running. It  means that cache is set and destroyed in each page and actually no cache is occurring. How can I further elaborate it? To diagnose that issue because currently I am working on performance of the site. 



I am also using New Relic for performance check. It also shows that database load is high.

and my.cnf information.
Slide #85 from my performance presentation talks about max packet size in MySQL, you need to increase that value; SET GLOBAL max_allowed_packet=33554432; or change it inside of the configuration file https://dev.mysql.com/doc/refman/5.7/en/packet-too-large.html