Each version of Solaris Change some default parameters in Solaris kernel
Those changes, should be documented in the release note, but AFAIK is not..
They are documented in the document Solaris Tuunable Parameters Reference Manual
Here let’s discuss few of them on Appendix
Range 1 to 2048 to: Range 1 to 2048, based on physical memory without any setting in the /etc/system file. 1 to 4096, if set in the /etc/system file.
Default 1024 to: Default 65,536
Limit on the number of shared memory segments that any one process can attach.
Default 1,048,576 to:Default 8,388,608
Range 1 to 0 (unlimited) to Range 0 (unlimited) to MAXINT
Range 1 millisecond to 20 seconds to: Range 1 millisecond to 2 hours
Default 16384 to Default 49,152
Default 24576 to Default 49,152