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 #***********************************************************************
12 # $Id: cache.test,v 1.4 2007/08/22 02:56:44 drh Exp $
14 set testdir [file dirname $argv0]
15 source $testdir/tester.tcl
17 ifcapable !pager_pragmas||!compound {
21 sqlite3_soft_heap_limit 0
23 proc pager_cache_size {db} {
24 set bt [btree_from_db $db]
26 array set stats [btree_pager_stats $bt]
31 if {[permutation] == ""} {
32 do_test cache-1.1 { pager_cache_size db } {0}
37 PRAGMA auto_vacuum=OFF;
38 CREATE TABLE abc(a, b, c);
39 INSERT INTO abc VALUES(1, 2, 3);
44 # At one point, repeatedly locking and unlocking the cache was causing
45 # a resource leak of one page per repetition. The page wasn't actually
46 # leaked, but would not be reused until the pager-cache was full (i.e.
47 # 2000 pages by default).
49 # This tests that once the pager-cache is initialized, it can be locked
50 # and unlocked repeatedly without internally allocating any new pages.
52 set cache_size [pager_cache_size db]
53 for {set ii 0} {$ii < 10} {incr ii} {
54 do_test cache-1.3.$ii {
55 execsql {SELECT * FROM abc}
60 #-------------------------------------------------------------------------
61 # This block of tests checks that it is possible to set the cache_size of a
62 # database to a small (< 10) value. More specifically:
64 # cache-2.1.*: Test that "PRAGMA cache_size" appears to work with small
66 # cache-2.2.*: Test that "PRAGMA main.cache_size" appears to work with
68 # cache-2.3.*: Test cache_size=1 correctly spills/flushes the cache.
69 # cache-2.4.*: Test cache_size=0 correctly spills/flushes the cache.
73 do_execsql_test cache-2.0 {
74 PRAGMA auto_vacuum=OFF;
75 PRAGMA journal_mode=DELETE;
76 CREATE TABLE t1(a, b);
77 CREATE TABLE t2(c, d);
78 INSERT INTO t1 VALUES('x', 'y');
79 INSERT INTO t2 VALUES('i', 'j');
82 for {set i 0} {$i < 20} {incr i} {
83 do_execsql_test cache-2.1.$i.1 "PRAGMA cache_size = $i"
84 do_execsql_test cache-2.1.$i.2 "PRAGMA cache_size" $i
85 do_execsql_test cache-2.1.$i.3 "SELECT * FROM t1" {x y}
86 do_execsql_test cache-2.1.$i.4 "PRAGMA cache_size" $i
88 for {set i 0} {$i < 20} {incr i} {
89 do_execsql_test cache-2.2.$i.1 "PRAGMA main.cache_size = $i"
90 do_execsql_test cache-2.2.$i.2 "PRAGMA main.cache_size" $i
91 do_execsql_test cache-2.2.$i.3 "SELECT * FROM t1" {x y}
92 do_execsql_test cache-2.2.$i.4 "PRAGMA main.cache_size" $i
95 # Tests for cache_size = 1.
97 do_execsql_test cache-2.3.1 {
98 PRAGMA cache_size = 1;
100 INSERT INTO t1 VALUES(1, 2);
102 } {main reserved temp closed}
103 do_test cache-2.3.2 { pager_cache_size db } 2
104 do_execsql_test cache-2.3.3 {
105 INSERT INTO t2 VALUES(1, 2);
107 } {main exclusive temp closed}
108 do_test cache-2.3.4 { pager_cache_size db } 2
109 do_execsql_test cache-2.3.5 COMMIT
110 do_test cache-2.3.6 { pager_cache_size db } 1
112 do_execsql_test cache-2.3.7 {
113 SELECT * FROM t1 UNION SELECT * FROM t2;
115 do_test cache-2.3.8 { pager_cache_size db } 1
117 # Tests for cache_size = 0.
119 do_execsql_test cache-2.4.1 {
120 PRAGMA cache_size = 0;
122 INSERT INTO t1 VALUES(1, 2);
124 } {main reserved temp closed}
125 do_test cache-2.4.2 { pager_cache_size db } 2
126 do_execsql_test cache-2.4.3 {
127 INSERT INTO t2 VALUES(1, 2);
129 } {main exclusive temp closed}
130 do_test cache-2.4.4 { pager_cache_size db } 2
131 do_execsql_test cache-2.4.5 COMMIT
133 do_test cache-2.4.6 { pager_cache_size db } 0
134 do_execsql_test cache-2.4.7 {
135 SELECT * FROM t1 UNION SELECT * FROM t2;
137 do_test cache-2.4.8 { pager_cache_size db } 0
139 sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)