High Cpu in 19c ||AIX

We are in situation where post upgrade to 19c , cpu utilization reaching 100%
It was upgraded from 11g 11204 to 19.9
On Aix7.2.

Application team runs certain batch jobs which spawns process and has huge logins , in awr login per sec is 150~

Is logins are heavy weight in 19c compared to 11g or any one faced any similar issue
We have applied certain patches for mga so sure that no issues with mga

Any suggestion/lead will be helpfull

Regards,
Krishna

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