High memory consumption after migrating to jdk 17 from jdk 8

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I recently migration an application from jdk-8 + tomcat 7 to jdk-17 + tomcat 9. After migration I see application is using around 7 GB of memory which was earlier around 5 - 5.5 GB. Heap size is not increasing its max 3 GB. I already analysed JFR, JVM native memory, GC logs but no luck. Any suggestion where/what should I be looking at/for to find the cause of it? Thanks !

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