On 12/27/06 3:16 AM, "Gavin Sherry" <[EMAIL PROTECTED]> wrote:
> On Wed, 27 Dec 2006, Heikki Linnakangas wrote:
>
>> Jie Zhang wrote:
>>> The "bitmap data segment" sounds good in terms of space. The problem is that
>>> one bitmap is likely to occupy more pages than before, which may hurt the
>>> query performance.
>>
>> We could have segments of say 1/5 of page. When a bitmap grows larger
>> than that, the bitmap would be moved to a page of its own. That way we
>> wouldn't get unnecessary fragmentation with large bitmaps, but small
>> bitmaps would be stored efficiently.
>
> Yes.
I see. This sounds good. I will think more about this.
Thanks,
Jie
---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PROTECTED] so that your
message can get through to the mailing list cleanly
