Sun Java System Web Server 6.1 2005Q4 SP5 Release Notes

64-bit Support on Solaris 10 (SPARC)

As of Sun Java System Web Server 6.1 SP5, a new 64-bit Solaris SPARC release is introduced to complement the existing 32-bit Solaris SPARC release. Sun encourages administrators to continue to deploy the 32-bit release of Sun Java System Web Server. The 64-bit release may be of use in certain memory-intensive deployments as it enables administrators to configure a larger file cache and Java heap than the 32-bit release. However, existing plug-ins are not compatible with the 64-bit release; these plug-ins will need to be recompiled for the 64-bit release by the plug-in vendor. Java web applications that use native, non-Java libraries will also need to be recompiled.

The 64-bit release is compatible with 64-bit Solaris kernels on UltraSPARC processors. The 64-bit release cannot be used on x86 processors or with 32-bit Solaris kernels. The 32-bit release continues to be compatible with both 32-bit and 64-bit Solaris kernels.

Note that the 64-bit and 32-bit releases of Sun Java System Web Server are packaged and distributed separately. It is not possible to upgrade an existing 32-bit Sun Java System Web Server installation to a 64-bit installation. It is possible to distinguish the 32-bit and 64-bit releases by the version string that is displayed in the installer, at server startup, and in the server errors log as follows:


Version String 


Sun ONE Web Server 6.1SP5 


Sun ONE Web Server 6.1SP5 (64-Bit)