[Java SE] GC is Extremely Slow Due to System Swap Activity
(Doc ID 1262554.1)
Last updated on OCTOBER 21, 2019
Applies to:Java Platform, Standard Edition - Version 1.4.2 and later
Information in this document applies to any platform.
Garbage Collection (GC) takes a very long time to complete. During this time any application threads are all paused and the application seems to hang. If the Java option -XX:+PrintGCDetails is used to report the GC activity, a very long "real" time will be reported, while "user" and "sys" times are much smaller:
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