Re: [Firebird-devel] FB 2.1 64bit and memory usage ??

[Alex P. <pes...@ma...>]

On Tuesday 24 July 2007 20:12, Leyne, Sean wrote:
> Alex,
>
> > > Disk sectors have been 512 bytes for the last 20 years and likely
>
> for
>
> > > many more.  Accordingly, our disk accesses will always be on sector
> > > boundaries.
> >
> > Sean, problem is that not all of our buffers are 512 bytes aligned
>
> now.
>
> Which buffers?
>

for example, this one:

static bool raw_devices_validate_database (
...
    char header[MIN_PAGE_SIZE];
...
    const ssize_t bytes = read (desc, header, sizeof(header));

I don't say it's impossible to make all of them aligned, but it was not done 
yet.

> The only buffers which need to be aligned would be those that would be
> written to disk AND where the file was opened with the special flag.

And read from disk to, me thinks?

> I was expecting that only the database file would be opened with the
> flag.

Yes, certainly.