Recently we migrated from ES-5.1 to ES7.4 and the CPU usage too high in ES7.4 compared to ES5.1
With a given load the max. cpu usage of 5.1 is in between 0% to 10%.
However the performance and max. cpu usage of 7.4 is in between 20% to 100%.
The cluster configuration of 7.4 is exactly same as 5.1 and same queries being used.
Please find the hot threads output for ES7.4
When there is no load
When there is usual load