Special installation guidelines for Solaris systems
Several kernel-tunable parameters, such as Message Queue, Semaphore, and Shared Memory Parameters, can affect NetBackup performance. If you adjust these values, you may prevent your system performance from slowing down or even reaching a deadlock state.
More information about tunable parameters is available online.
Recommended NetBackup *NIX semaphore tuning values (Linux and Solaris)
Tuning Solaris 10 for NetBackup
Tuning Solaris 10 shared memory for NetBackup Media Server processes (bptm / bpdm)
http://www.veritas.com/docs/000034846
While this link refers to NetBackup 6.x, the information remains valid for NetBackup 7.x and NetBackup 8.x.