JDK-8286115 changed ergonomic sizing of a component of the remembered sets in G1. This change causes increased native memory usage of the Hotspot VM for applications that create large remembered sets with the G1 collector.

In an internal benchmark total GC component native memory usage rose by almost 10% (from 1.2GB to 1.3GB).

This issue can be worked around by passing double the value of `G1RemSetArrayOfCardsEntries` as printed by running the application with `-XX:+PrintFlagsFinal -XX:+UnlockExperimentalVMOptions` to your application.

E.g. pass `-XX:+UnlockExperimentalVMOptions -XX:G1RemSetArrayOfCardsEntries=128` if a previous run showed a value of `64` for `G1RemSetArrayOfCardsEntries` in the output of `-XX:+PrintFlagsFinal`.

This issue has been addressed in JDK 19.0.1 or later.