3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #*************************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus of this script is testing that the overflow-page related
13 # enhancements added after version 3.3.17 speed things up.
15 # $Id: speed3.test,v 1.6 2009/07/09 02:48:24 shane Exp $
18 #---------------------------------------------------------------------
21 # If auto-vacuum is enabled for the database, the following cases
22 # should show performance improvement with respect to 3.3.17.
24 # + When deleting rows that span overflow pages. This is faster
25 # because the overflow pages no longer need to be read before
26 # they can be moved to the free list (test cases speed3-1.X).
28 # + When reading a column value stored on an overflow page that
29 # is not the first overflow page for the row. The improvement
30 # in this case is because the overflow pages between the tree
31 # page and the overflow page containing the value do not have
32 # to be read (test cases speed3-2.X).
35 set testdir [file dirname $argv0]
36 source $testdir/tester.tcl
38 ifcapable !tclvar||!attach {
43 speed_trial_init speed1
45 # Set a uniform random seed
50 # The number_name procedure below converts its argment (an integer)
51 # into a string which is the English-language name for that number.
55 # puts [number_name 123] -> "one hundred twenty three"
57 set ones {zero one two three four five six seven eight nine
58 ten eleven twelve thirteen fourteen fifteen sixteen seventeen
60 set tens {{} ten twenty thirty forty fifty sixty seventy eighty ninety}
61 proc number_name {n} {
63 set txt "[number_name [expr {$n/1000}]] thousand"
64 set n [expr {$n%1000}]
69 append txt " [lindex $::ones [expr {$n/100}]] hundred"
73 append txt " [lindex $::tens [expr {$n/10}]]"
77 append txt " [lindex $::ones $n]"
79 set txt [string trim $txt]
80 if {$txt==""} {set txt zero}
84 proc populate_t1 {db} {
86 for {set ii 0} {$ii < $::NROW} {incr ii} {
87 set N [number_name $ii]
88 set repeats [expr {(10000/[string length $N])+1}]
89 set text [string range [string repeat $N $repeats] 0 10000]
90 $db eval {INSERT INTO main.t1 VALUES($ii, $text, $ii)}
92 $db eval {INSERT INTO aux.t1 SELECT * FROM main.t1}
99 array set stats1 [btree_pager_stats [btree_from_db db]]
100 array set stats2 [btree_pager_stats [btree_from_db db 2]]
102 # puts "1: [array get stats1]"
103 # puts "2: [array get stats2]"
104 puts "Incrvacuum: Read $stats1(read), wrote $stats1(write)"
105 puts "Normal : Read $stats2(read), wrote $stats2(write)"
108 proc speed3_reset_db {} {
112 PRAGMA main.cache_size = 200000;
113 PRAGMA main.auto_vacuum = 'incremental';
114 ATTACH 'test2.db' AS 'aux';
115 PRAGMA aux.auto_vacuum = 'none';
119 forcedelete test2.db test2.db-journal
122 # Set up a database in auto-vacuum mode and create a database schema.
126 CREATE TABLE main.t1(a INTEGER, b TEXT, c INTEGER);
129 SELECT name FROM sqlite_master ORDER BY 1;
134 CREATE TABLE aux.t1(a INTEGER, b TEXT, c INTEGER);
137 SELECT name FROM aux.sqlite_master ORDER BY 1;
143 SELECT count(*) FROM main.t1;
144 SELECT count(*) FROM aux.t1;
149 PRAGMA main.auto_vacuum;
150 PRAGMA aux.auto_vacuum;
154 # Delete all content in a table, one row at a time.
158 speed_trial speed3-1.incrvacuum $::NROW row {DELETE FROM main.t1 WHERE 1}
159 speed_trial speed3-1.normal $::NROW row {DELETE FROM aux.t1 WHERE 1}
162 # Select the "C" column (located at the far end of the overflow
163 # chain) from each table row.
165 #db eval {PRAGMA incremental_vacuum(500000)}
168 speed_trial speed3-2.incrvacuum $::NROW row {SELECT c FROM main.t1}
169 speed_trial speed3-2.normal $::NROW row {SELECT c FROM aux.t1}