Request for Review (xs) - 8151845: Comment in globals.hpp for MetaspaceSize is incorrect. (original) (raw)

kirk at kodewerk.com kirk at kodewerk.com
Tue Mar 15 17:59:08 UTC 2016

Hi Jon,

I very much like what you have written.

Kind regards, Kirk

On Mar 15, 2016, at 5:56 PM, Jon Masamitsu <jon.masamitsu at oracle.com> wrote:

https://bugs.openjdk.java.net/browse/JDK-8151845 Change the description for MetaspaceSize in globals.hpp thus _- "Initial size of Metaspaces (in bytes)") _ _+ "Initial threshold (in bytes) at which a garbage collection " _ _+ "is done to reduce Metaspace usage") _ Garbage collections will be done specifically to recover metadata (the GC finds dead classloaders and identifies metadata associated with the classloaders that is no longer used). Triggering a GC for metadata recovery is done if the amount of metadata in use exceeds a threshold that is dynamically adjusted (threshold is raised or lowered depending on the amount of Metaspace made available for new metadata allocations). MetaspaceSize is the initial threshold. http://cr.openjdk.java.net/~jmasa/8141845/webrev.00/ I am very open to suggestions for a better description. My apologies to Yasumasa Suenaga for not settling this issue when he raised it almost 2 years ago. http://mail.openjdk.java.net/pipermail/hotspot-gc-dev/2014-April/009916.html Jon

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