oracle and vpar

[Duncan Edmonstone]

Supported yes... good idea? that depends...

The thing about vPars is that any 'floating' processor (i.e. a processor that can be moved from one vPar to another) is unable to carry out any IO operations. This is due to the fact that the current version of HP-UX does not support migration of IO interrupts off a running processor. This functionality is coming to vPars some time next year, but as things stand, any floating processors will not do any IO for you.

What does this mean? Well what it means in practice is you *need* to benchmark your database performance both with and without floating processors to get a good feel for performance - could be your parcticular IO profile will not be impacted by this issue, or it could be it severely reduces your throughput - you MUST test before deploying in a vPar config.

Just my $0.02 worth

Duncan