Proposal: MaxTenuringThreshold and age field size changes

Thomas Viessmann Thomas.Viessmann at Sun.COM
Wed May 28 23:44:49 PDT 2008


Just my two cents:

 > (out of curiosity: does anyone actually use -XX:+NeverTenure?)

No, I wasn't even aware of this flag.

 > If MTT is set by the user to a value > max age, we will actually set 
it to max age.

Agree. Still most customers use 32.

> how many people on the list missed the age-bit that vanished across the 
> 5u5->5u6 transition and wished the bit were back?

Actually most if not all customers missed that change. I always see
32 or 0. Nothing in between. Customers typically just enable or disable
survivor spaces and do not care about the 4 or 5 bit granularity of
MaxTenuringThreshold



-- 
--- 
mit freundlichen Gruessen / with kind regards


Thomas Viessmann

Global Sales and Services - Software Support Engineering

Sun Microsystems GmbH           Phone:  +49 (0)89 46008 2365 / x62365
Sonnenallee 1                   Mobile: +49 (0)174 300 5467
D-85551 Kirchheim-Heimstetten   Pager:  Thomas.Viessmann at sun.itechtool.com
Germany/Deutschland             mailto: Thomas.Viessmann at sun.com
http://www.sun.de 		

Amtsgericht Muenchen: HRB 161028
Geschaeftsfuehrer:  Thomas Schroeder, Wolfgang Engels, Dr. Roland Boemer
Vorsitzender des Aufsichtsrates: Martin Haering




More information about the hotspot-gc-dev mailing list