SMP + PostgreSQL in FreeBSD

Hi all,
  The FreeBSD 5.0 released recently. Some phrases from release notes:". . .   SMP support has been largely reworked, incorporating code from       BSD/OS 5.0. One of the main features of SMPng (``SMP Next Generation'')      is to allow more processes to run in kernel, without the need for       spin locks that can dramatically reduce the efficiency of multiple      processors   . . .".
  Reading this release notes I see only this great improvement vs 4.7 version,which can help for SQL server. On other hand FreeBSD 5.0 have totallyredesigned kernel, I m afraid to setup productional DB to it.  We had bought PC with 2xPIII, which will be dedicated PostgreSQL server.Old releases (4.7, for example) also supports SMP, but worse comparative withversion 5 as described in above mentioned release notes. Please say,if anybody test SMP in FreeBSD for PostgreSQL - really Postgres with v5.0 will "dramatically" increase SQL server performance? 

  Thanks a lot for any advance for this question.


--best regards,Ruslan A Dautkhanov