1# 2008 August 29 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# This file is focused on testing the pcache module. 13# 14# $Id: pcache.test,v 1.2 2008/09/05 05:29:09 danielk1977 Exp $ 15 16set testdir [file dirname $argv0] 17source $testdir/tester.tcl 18 19 20# The pcache module limits the number of pages available to purgeable 21# caches to the sum of the 'cache_size' values for the set of open 22# caches. This block of tests, pcache-1.*, test that the library behaves 23# corrctly when it is forced to exceed this limit. 24# 25do_test pcache-1.1 { 26 db close 27 pcache_stats 28} {current 0 max 0 min 0 recyclable 0} 29 30do_test pcache-1.2 { 31 sqlite3 db test.db 32 execsql { 33 PRAGMA cache_size=10; 34 PRAGMA auto_vacuum=0; 35 } 36 pcache_stats 37} {current 1 max 10 min 10 recyclable 1} 38 39do_test pcache-1.3 { 40 execsql { 41 BEGIN; 42 CREATE TABLE t1(a, b, c); 43 CREATE TABLE t2(a, b, c); 44 CREATE TABLE t3(a, b, c); 45 CREATE TABLE t4(a, b, c); 46 CREATE TABLE t5(a, b, c); 47 } 48 pcache_stats 49} {current 6 max 10 min 10 recyclable 0} 50 51do_test pcache-1.4 { 52 execsql { 53 CREATE TABLE t6(a, b, c); 54 CREATE TABLE t7(a, b, c); 55 CREATE TABLE t8(a, b, c); 56 CREATE TABLE t9(a, b, c); 57 } 58 pcache_stats 59} {current 10 max 10 min 10 recyclable 0} 60 61do_test pcache-1.5 { 62 sqlite3 db2 test.db 63 execsql "PRAGMA cache_size=10" db2 64 pcache_stats 65} {current 11 max 20 min 20 recyclable 1} 66 67do_test pcache-1.6 { 68 execsql { 69 BEGIN; 70 SELECT * FROM sqlite_master; 71 } db2 72 pcache_stats 73} {current 11 max 20 min 20 recyclable 0} 74 75# At this point connection db2 has a read lock on the database file and a 76# single pinned page in its cache. Connection [db] is holding 10 dirty 77# pages. It cannot recycle them because of the read lock held by db2. 78# 79do_test pcache-1.6 { 80 execsql { 81 CREATE INDEX i1 ON t1(a, b); 82 CREATE INDEX i2 ON t2(a, b); 83 CREATE INDEX i3 ON t3(a, b); 84 CREATE INDEX i4 ON t4(a, b); 85 CREATE INDEX i5 ON t5(a, b); 86 CREATE INDEX i6 ON t6(a, b); 87 CREATE INDEX i7 ON t7(a, b); 88 CREATE INDEX i8 ON t8(a, b); 89 CREATE INDEX i9 ON t9(a, b); 90 } 91 pcache_stats 92} {current 20 max 20 min 20 recyclable 0} 93 94do_test pcache-1.7 { 95 execsql { 96 CREATE TABLE t10(a, b, c); 97 } 98 pcache_stats 99} {current 21 max 20 min 20 recyclable 0} 100 101# Rolling back the transaction held by db2 at this point releases a pinned 102# page. Because the number of allocated pages is greater than the 103# configured maximum, this page should be freed immediately instead of 104# recycled. 105# 106do_test pcache-1.8 { 107 execsql {ROLLBACK} db2 108 pcache_stats 109} {current 20 max 20 min 20 recyclable 0} 110 111do_test pcache-1.9 { 112 execsql COMMIT 113 pcache_stats 114} {current 20 max 20 min 20 recyclable 20} 115 116do_test pcache-1.10 { 117 db2 close 118 pcache_stats 119} {current 10 max 10 min 10 recyclable 10} 120 121do_test pcache-1.11 { 122 execsql { PRAGMA cache_size = 20 } 123 pcache_stats 124} {current 10 max 20 min 10 recyclable 10} 125 126do_test pcache-1.12 { 127 execsql { 128 SELECT * FROM t1 ORDER BY a; SELECT * FROM t1; 129 SELECT * FROM t2 ORDER BY a; SELECT * FROM t2; 130 SELECT * FROM t3 ORDER BY a; SELECT * FROM t3; 131 SELECT * FROM t4 ORDER BY a; SELECT * FROM t4; 132 SELECT * FROM t5 ORDER BY a; SELECT * FROM t5; 133 SELECT * FROM t6 ORDER BY a; SELECT * FROM t6; 134 SELECT * FROM t7 ORDER BY a; SELECT * FROM t7; 135 SELECT * FROM t8 ORDER BY a; SELECT * FROM t8; 136 SELECT * FROM t9 ORDER BY a; SELECT * FROM t9; 137 } 138 pcache_stats 139} {current 19 max 20 min 10 recyclable 19} 140 141do_test pcache-1.13 { 142 execsql { PRAGMA cache_size = 15 } 143 pcache_stats 144} {current 15 max 15 min 10 recyclable 15} 145 146finish_test 147 148