Solaris Tunable Parameters Reference Manual
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New or Changed Parameters in the Solaris 9 Releases

The following sections describe new or changed parameters in the Solaris 9 releases.


This parameter is new in the Solaris 9 12/02 release. For information, see ip_policy_mask.

Removal of sun4d Support

The sun4d platform is not supported in the Solaris 9 release. The following parameters were modified to reflect the removal of sun4d support:

  • max_nprocs

  • maxphys

  • noexec_user_stack

Unsupported or Obsolete Parameters

priority_paging and cachefree are Not Supported

The priority_paging and cachefree tunable parameters are not supported in the Solaris 9 release. They have been replaced with an enhanced file system caching architecture that implements paging policies similar to priority paging, but are always enabled. Attempts to set these parameters in the /etc/system file result in boot-time warnings such as:

sorry, variable 'priority_paging' is not defined in the 'kernel'
sorry, variable 'cachefree' is not defined in the 'kernel'     

The SUNWcsr packages that contain the /etc/system file have been modified so that the inclusion of the priority_paging or cachefree tunable parameters are prohibited. If you upgrade to the Solaris 9 release or add the SUNWcsr packages and your /etc/system file includes the priority_paging or cachefree parameters, the following occurs:

  1. This message is displayed if the priority_paging or cachefree parameters are set in the /etc/system file:

    /etc/system has been modified since it contains references to priority 
    paging tunables. Please review the changed file.
  2. Comments are inserted in the /etc/system file before any line that sets priority_paging or cachefree. For example, if priority_paging is set to 1, the following lines are inserted before the line with the priority_paging value:

*NOTE: As of Solaris 9, priority paging is unnecessary and has been removed.
* Since references to priority paging-related tunables will now result in 
* boot-time warnings, the assignment below has been commented out. For more 
* details,see the Solaris 9 Release Notes,or the "Solaris Tunable Parameters
* Reference Manual".
System V Shared Memory

The following parameters are obsolete:

  • shmsys:shminfo_shmmin

  • shmsys:shminfo_shmseg

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