RELEASE NOTES: JDK 19.0.1

G1 Remembered set memory footprint regression after JDK-8286115

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.

Update Timezone Data to 2022c

This version includes changes from 2022b that merged multiple regions that have the same timestamp data post-1970 into a single time zone database. All time zone IDs remain the same but the merged time zones will point to a shared zone database.

As a result, pre-1970 data may not be compatible with earlier JDK versions. The affected zones are `Antarctica/Vostok, Asia/Brunei, Asia/Kuala_Lumpur, Atlantic/Reykjavik, Europe/Amsterdam, Europe/Copenhagen, Europe/Luxembourg, Europe/Monaco, Europe/Oslo, Europe/Stockholm, Indian/Christmas, Indian/Cocos, Indian/Kerguelen, Indian/Mahe, Indian/Reunion, Pacific/Chuuk, Pacific/Funafuti, Pacific/Majuro, Pacific/Pohnpei, Pacific/Wake, Pacific/Wallis, Arctic/Longyearbyen, Atlantic/Jan_Mayen, Iceland, Pacific/Ponape, Pacific/Truk, and Pacific/Yap`.

For more details, refer to the announcement of 2022b