> > Isn't spinlock just a few ASM instructions?... on most platforms...
>
> If we change over to something that supports read vs write locking,
> it's probably going to be rather more than that ... right now, I'm
> pretty dissatisfied with the performance of our spinlocks under load.
We shouldn't use light locks everywhere. Updating/reading MyProc.xid
is very good place to use simple spinlocks... or even better mutexes.
Vadim