> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[email protected]] On Behalf Of Doug Henry > Sent: Monday, January 04, 2010 11:33 AM > To: [email protected] > Subject: Re: dead zone > > Here is an IBM document that answers many of the questions > raised in this > thread. > > Match 31-bit WebSphere Application Server performance with > new features in > 64-bit Java on System z > > http://www-03.ibm.com/servers/enable/site/education/wp/1d71a/1d71a.pdf > > Doug
Very interesting! Thanks for posting that URL. Using the "bar" for storage avoids out-of-memory errors in 31 bit Java and the overhead in 64 bit Java. The 31 bit Java pointer is 24 bytes, but 48 bytes (with some padding bytes) in 64 bit. So that reduces the storage overhead and page tables and TLB usage. At least, as best as I can tell. -- John McKown Systems Engineer IV IT Administrative Services Group HealthMarkets(r) 9151 Boulevard 26 * N. Richland Hills * TX 76010 (817) 255-3225 phone * (817)-961-6183 cell [email protected] * www.HealthMarkets.com Confidentiality Notice: This e-mail message may contain confidential or proprietary information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. HealthMarkets(r) is the brand name for products underwritten and issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake Life Insurance Company(r), Mid-West National Life Insurance Company of TennesseeSM and The MEGA Life and Health Insurance Company.SM ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
