MaxTenuringThreshold available in ParNewGC?

[Li Li]

hi all
   I have an application that generating many large objects and then
discard them. I found that full gc can free memory from 70% to 40%.
   I want to let this objects in young generation longer. I found
-XX:MaxTenuringThreshold and -XX:PretenureSizeThreshold.
   But I found a blog that says MaxTenuringThreshold is not used in
ParNewGC.
And I use ParNewGC+CMS. I tried to set MaxTenuringThreshold=10, but it
seems no difference.
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