james ni wrote:
> As in the example that I provided, there are 4 cells in a single btree
> page. So there must be some mechanism to determine hoe many keys that
> one cell can own.

One key per cell:
| Within an interior b-tree page, each key and the pointer to its
| immediate left are combined into a structure called a "cell". The
| right-most pointer is held separately.

> I want to know exactly the very value and just how to change the value
> to a larger one, for example, 256, 512, or even larger.

Keys (and values) can have arbitrary size, so to change how many can fit
into a page, make them smaller.  :)


Regards,
Clemens
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