Solaris 9 Tuning parameters change
By hstsao on Jul 13, 2004
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
maxusersRange 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.
rlim_fd_maxDefault 1024 to: Default 65,536
Limit on the number of shared memory segments that any one process can attach.
shmsys:shminfo_shmmaxDefault 1,048,576 to:Default 8,388,608
sq_max_sizeRange 1 to 0 (unlimited) to Range 0 (unlimited) to MAXINT
tcp_rexmit_interval_maxRange 1 millisecond to 20 seconds to: Range 1 millisecond to 2 hours
tcp_xmit_hiwatDefault 16384 to Default 49,152
Default 24576 to Default 49,152