Performance issue found : Upgade elasticsearch 7.8 to 7.17

Hi Team,

We are facing major performance issue after upgrade elasticsearch from 7.8 to 7.17 by rolling method.

Our Query hits elasticsearch using java rest api(7.2.1).

Perfomance degrade form 20ms to 300ms.

I need to to know is any major change in bakend at time of upgradtion related performance ,data ,etc.

Do we need to any parmater/configuration modification required after upgradation from 7.8 to 7.17 from


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