Douglas Tosi wrote:

> Hi!
>
> After reading this paper:
> http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_expert2
> (great stuff, thanks Ann!) I have a couple of questions.
>
> 1) What is the size of the Generic Page Header? I counted 16. Can you
> confirm this, please?

That's what I get counting on my fingers. You could look in
ods.h where page structures are defined. And that paper is
old - newer versions may have found uses for the eight bytes
looking for a purpose.

>
> 2) On the TIP, what is the size of the "next" field? As I understand
> this field is a pointer to another page. I assume it's 8 bytes.
> Correct?

4 bytes. Firebird databases are restricted to 2**32 pages per file,
which I once thought was absolutely retirement proof, given that pages
can be up to 16Kb. I'd better retire soon.


cheers,

Ann