Does allocation performance vary by collector?

Matt Khan matt.khan at db.com
Tue Apr 13 10:52:09 PDT 2010


>> There are 2 typical lifetimes of these objects with about 75%
this should have read as "with about 75% surviving for <1s"

Cheers
Matt

hotspot-gc-dev-bounces at openjdk.java.net wrote on 13/04/2010 18:46:09:

> Hi
> 
> I have been revisiting our jvm configuration with the aim of reducing 
> pause times, it would be nice to be consistently down below 3ms all the 
> time. The allocation behaviour of the application in question involves a 

> small amount of static data on startup & then a steady stream of objects 

> that have a relatively short lifespan. There are 2 typical lifetimes of 
> these objects with about 75% while the remainder have a mean of maybe 
70s 
> but there is a quite a long tail to this so the typical lifetime is more 

> like <10s. There won't be many such objects alive at once but there are 
> quite a few passing through. The app runs on a 16 core opteron box 
running 
> Solaris 10 with 6u18.
> 



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