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Overview
Comment:Fix typos the source to webpages html files. (CVS 703)
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SHA1: 61bb3af7405aa7b54f3e5519537ea483879eed39
User & Date: drh 2002-08-06 12:05:00.000
Context
2002-08-11
20:10
Fix for ticket #9: Add the ability to read little-endian database files from a big-endian machine and vice versa. (CVS 704) (check-in: ce4b943bf6 user: drh tags: trunk)
2002-08-06
12:05
Fix typos the source to webpages html files. (CVS 703) (check-in: 61bb3af740 user: drh tags: trunk)
2002-08-04
00:52
Fix for ticket #131: When a SELECT contains a GROUP BY clause it cannot use an index for sorting. It has to sort as a separate operation after the GROUP BY is complete. (CVS 702) (check-in: 18745c67ac user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to www/arch.tcl. 
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#
# Run this Tcl script to generate the sqlite.html file.
#
set rcsid {$Id: arch.tcl,v 1.7 2001/11/24 13:23:05 drh Exp $}

puts {<html>
<head>
  <title>Architecture of SQLite</title>
</head>
<body bgcolor=white>
<h1 align=center>




|








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#
# Run this Tcl script to generate the sqlite.html file.
#
set rcsid {$Id: arch.tcl,v 1.8 2002/08/06 12:05:00 drh Exp $}

puts {<html>
<head>
  <title>Architecture of SQLite</title>
</head>
<body bgcolor=white>
<h1 align=center>
︙︙
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<b>btree.h</b>.
</p>

<h2>Page Cache</h2>

<p>The B-tree module requests information from the disk in 1024 byte
chunks.  The page cache is reponsible for reading, writing, and
caching these chunks at the behest of the B-tree module.
The page cache also provides the rollback and atomic commit abstraction
and takes care of reader/writer locking of the database file.  The
B-tree driver requests particular pages from the page cache and notifies
the page cache when it wants to modify pages or commit or rollback
changes and the page cache handles all the messy details of making sure
the requests are handled quickly, safely, and efficiently.</p>

<p>The code to implement the page cache is contained in the single C
source file <b>pager.c</b>.  The interface to the page cache subsystem
is defined by the header file <b>pager.h</b>.
</p>

<h2>OS Interface</h2>

<p>
In order to provide portability between POSIX and Win32 operating systems,
SQLite uses an abstraction layer to interace with the operating system.
The <b>os.c</b> file contains about 20 routines used for opening and
closing files, deleting files, creating and deleting locks on files,
flushing the disk cache, and so forth.  Each of these functions contains
two implementations separated by #ifdefs: one for POSIX and the other
for Win32.  The interface to the OS abstraction layer is defined by
the <b>os.h</b> header file.
</p>








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<b>btree.h</b>.
</p>

<h2>Page Cache</h2>

<p>The B-tree module requests information from the disk in 1024 byte
chunks.  The page cache is reponsible for reading, writing, and
caching these chunks.
The page cache also provides the rollback and atomic commit abstraction
and takes care of reader/writer locking of the database file.  The
B-tree driver requests particular pages from the page cache and notifies
the page cache when it wants to modify pages or commit or rollback
changes and the page cache handles all the messy details of making sure
the requests are handled quickly, safely, and efficiently.</p>

<p>The code to implement the page cache is contained in the single C
source file <b>pager.c</b>.  The interface to the page cache subsystem
is defined by the header file <b>pager.h</b>.
</p>

<h2>OS Interface</h2>

<p>
In order to provide portability between POSIX and Win32 operating systems,
SQLite uses an abstraction layer to interface with the operating system.
The <b>os.c</b> file contains about 20 routines used for opening and
closing files, deleting files, creating and deleting locks on files,
flushing the disk cache, and so forth.  Each of these functions contains
two implementations separated by #ifdefs: one for POSIX and the other
for Win32.  The interface to the OS abstraction layer is defined by
the <b>os.h</b> header file.
</p>
︙︙
Changes to www/speed.tcl. 
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#
# Run this Tcl script to generate the speed.html file.
#
set rcsid {$Id: speed.tcl,v 1.6 2002/03/11 02:06:14 drh Exp $ }

puts {<html>
<head>
  <title>Database Speed Comparison: SQLite versus PostgreSQL</title>
</head>
<body bgcolor=white>
<h1 align=center>




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#
# Run this Tcl script to generate the speed.html file.
#
set rcsid {$Id: speed.tcl,v 1.7 2002/08/06 12:05:01 drh Exp $ }

puts {<html>
<head>
  <title>Database Speed Comparison: SQLite versus PostgreSQL</title>
</head>
<body bgcolor=white>
<h1 align=center>
︙︙
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<tr><td>SQLite 2.4:</td><td align="right">&nbsp;&nbsp;&nbsp;6.137</td></tr>
<tr><td>SQLite 2.4 (nosync):</td><td align="right">&nbsp;&nbsp;&nbsp;6.112</td></tr>
</table>

<p>
This set of 100 queries uses string comparisons instead of
numerical comparisions.  As a result, the speed of SQLite is
compariable to are better then PostgreSQL and MySQL.
</p>

<h2>Test 5: Creating an index</h2>
<blockquote>
CREATE INDEX i2a ON t2(a);<br>CREATE INDEX i2b ON t2(b);
</blockquote><table border=0 cellpadding=0 cellspacing=0>
<tr><td>PostgreSQL:</td><td align="right">&nbsp;&nbsp;&nbsp;0.510</td></tr>








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<tr><td>SQLite 2.4:</td><td align="right">&nbsp;&nbsp;&nbsp;6.137</td></tr>
<tr><td>SQLite 2.4 (nosync):</td><td align="right">&nbsp;&nbsp;&nbsp;6.112</td></tr>
</table>

<p>
This set of 100 queries uses string comparisons instead of
numerical comparisions.  As a result, the speed of SQLite is
compariable to or better then PostgreSQL and MySQL.
</p>

<h2>Test 5: Creating an index</h2>
<blockquote>
CREATE INDEX i2a ON t2(a);<br>CREATE INDEX i2b ON t2(b);
</blockquote><table border=0 cellpadding=0 cellspacing=0>
<tr><td>PostgreSQL:</td><td align="right">&nbsp;&nbsp;&nbsp;0.510</td></tr>
︙︙