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.


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