Priority Paging and Related Kernel Tunables (priority_paging/cachefree)

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

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

If you upgrade to the Solaris 9 release or pkgadd the SUNWcsr packages, and your /etc/system file includes the priority_paging or cachefree parameters, the following occurs:

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

   NOTE: /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, this line is replaced with the following lines:

   * 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". * set priority_paging=1