1 # 2007 March 24 2 # 3 # The author disclaims copyright to this source code. In place of 4 # a legal notice, here is a blessing: 5 # 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. 9 # 10 #*********************************************************************** 11 # 12 # $Id: cache.test,v 1.4 2007/08/22 02:56:44 drh Exp $ 13 14 set testdir [file dirname $argv0] 15 source $testdir/tester.tcl 16 17 ifcapable {!pager_pragmas} { 18 finish_test 19 return 20 } 21 sqlite3_soft_heap_limit 0 22 23 proc pager_cache_size {db} { 24 set bt [btree_from_db $db] 25 db_enter $db 26 array set stats [btree_pager_stats $bt] 27 db_leave $db 28 return $stats(page) 29 } 30 31 if {[permutation] == ""} { 32 do_test cache-1.1 { pager_cache_size db } {0} 33 } 34 35 do_test cache-1.2 { 36 execsql { 37 PRAGMA auto_vacuum=OFF; 38 CREATE TABLE abc(a, b, c); 39 INSERT INTO abc VALUES(1, 2, 3); 40 } 41 pager_cache_size db 42 } {2} 43 44 # At one point, repeatedly locking and unlocking the cache was causing 45 # a resource leak of one page per repetition. The page wasn't actually 46 # leaked, but would not be reused until the pager-cache was full (i.e. 47 # 2000 pages by default). 48 # 49 # This tests that once the pager-cache is initialised, it can be locked 50 # and unlocked repeatedly without internally allocating any new pages. 51 # 52 set cache_size [pager_cache_size db] 53 for {set ii 0} {$ii < 10} {incr ii} { 54 do_test cache-1.3.$ii { 55 execsql {SELECT * FROM abc} 56 pager_cache_size db 57 } $::cache_size 58 } 59 60 #------------------------------------------------------------------------- 61 # This block of tests checks that it is possible to set the cache_size of a 62 # database to a small (< 10) value. More specifically: 63 # 64 # cache-2.1.*: Test that "PRAGMA cache_size" appears to work with small 65 # values. 66 # cache-2.2.*: Test that "PRAGMA main.cache_size" appears to work with 67 # small values. 68 # cache-2.3.*: Test cache_size=1 correctly spills/flushes the cache. 69 # cache-2.4.*: Test cache_size=0 correctly spills/flushes the cache. 70 # 71 # 72 db_delete_and_reopen 73 do_execsql_test cache-2.0 { 74 PRAGMA auto_vacuum=OFF; 75 PRAGMA journal_mode=DELETE; 76 CREATE TABLE t1(a, b); 77 CREATE TABLE t2(c, d); 78 INSERT INTO t1 VALUES('x', 'y'); 79 INSERT INTO t2 VALUES('i', 'j'); 80 } {delete} 81 82 for {set i 0} {$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" $i 87 } 88 for {set i 0} {$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 93 } 94 95 # Tests for cache_size = 1. 96 # 97 do_execsql_test cache-2.3.1 { 98 PRAGMA cache_size = 1; 99 BEGIN; 100 INSERT INTO t1 VALUES(1, 2); 101 PRAGMA lock_status; 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); 106 PRAGMA lock_status; 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 } 1 111 112 do_execsql_test cache-2.3.7 { 113 SELECT * FROM t1 UNION SELECT * FROM t2; 114 } {1 2 i j x y} 115 do_test cache-2.3.8 { pager_cache_size db } 1 116 117 # Tests for cache_size = 0. 118 # 119 do_execsql_test cache-2.4.1 { 120 PRAGMA cache_size = 0; 121 BEGIN; 122 INSERT INTO t1 VALUES(1, 2); 123 PRAGMA lock_status; 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); 128 PRAGMA lock_status; 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 132 133 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; 136 } {1 2 i j x y} 137 do_test cache-2.4.8 { pager_cache_size db } 0 138 139 sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit) 140 finish_test 141
