On 12/17/07, Decibel! <decibel(at)decibel(dot)org> wrote:
> Also, has anyone looked into adding a class of system calls that
> would actually tell us if the kernel issued physical IO? I find it
> hard to believe that other RDBMSes wouldn't like to have that info...
Non-blocking style interfaces can help here. On Windows, for instance,
a read returns data at the call site if it was satisfied by cache,
instead of invoking the asynchronous notification.