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Overview
Comment:Use > instead of > in documentation.
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 4607eaf52f87231c1a2ae408f586533e444c4744
User & Date: drh 2016-05-09 23:12:17
Context
2016-05-16
15:41
Clarify wording in cintro.html. check-in: b9557433b1 user: drh tags: trunk
2016-05-09
23:12
Use > instead of > in documentation. check-in: 4607eaf52f user: drh tags: trunk
20:14
Fix a typo in the change log. check-in: 5100e74a66 user: drh tags: trunk
Changes
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Changes to pages/fileformat2.in.

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<ul>
<li>X is U-35 for table btree leaf pages or
    ((U-12)*64/255)-23 for index pages.
<li>M is always ((U-12)*32/255)-23.
<li>Let K be M+((P-M)%(U-4)).
<li>^If P&lt;=X then all P bytes of payload are stored directly on the 
    btree page without overflow.
<li>^If P>X and K&lt;=X then the first K bytes of P are stored on the 
    btree page and the remaining P-K bytes are stored on overflow pages.
<li>^If P>X and K>X then the first M bytes of P are stored on the
    btree page and the remaining P-M bytes are stored on overflow pages.
</ul>

<p>The overflow thresholds are designed to give a minimum fanout of
4 for index b-trees and to make sure enough of the payload
is on the b-tree page that the record header can usually be accessed
without consulting an overflow page.  In hindsight, the designers of







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<ul>
<li>X is U-35 for table btree leaf pages or
    ((U-12)*64/255)-23 for index pages.
<li>M is always ((U-12)*32/255)-23.
<li>Let K be M+((P-M)%(U-4)).
<li>^If P&lt;=X then all P bytes of payload are stored directly on the 
    btree page without overflow.
<li>^If P&gt;X and K&lt;=X then the first K bytes of P are stored on the 
    btree page and the remaining P-K bytes are stored on overflow pages.
<li>^If P&gt;X and K&gt;X then the first M bytes of P are stored on the
    btree page and the remaining P-M bytes are stored on overflow pages.
</ul>

<p>The overflow thresholds are designed to give a minimum fanout of
4 for index b-trees and to make sure enough of the payload
is on the b-tree page that the record header can usually be accessed
without consulting an overflow page.  In hindsight, the designers of