Oracle Solaris Tunable Parameters Reference Manual

tsb_rss_factor (Solaris 10 Releases)

The when to change example text was changed to this:

For example, changing tsb_rss_factor to 256 (effectively, 50%) instead of 384 (effectively, 75%) might help eliminate virtual address conflicts in the TSB in some cases, but will use more kernel memory, particularly on a heavily loaded system.