AryaWu/sqlite

1# 2007 March 242#3# The author disclaims copyright to this source code.  In place of4# 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 14set testdir [file dirname $argv0]15source $testdir/tester.tcl16 17ifcapable !pager_pragmas||!compound {18  finish_test19  return20}21sqlite3_soft_heap_limit 022 23proc pager_cache_size {db} {24  set bt [btree_from_db $db]25  db_enter $db26  array set stats [btree_pager_stats $bt]27  db_leave $db28  return $stats(page)29}30 31if {[permutation] == ""} { 32  do_test cache-1.1 { pager_cache_size db } {0}33}34 35do_test cache-1.2 {36  execsql {37    PRAGMA auto_vacuum=OFF;38    CREATE TABLE abc(a, b, c);39    INSERT INTO abc VALUES(1, 2, 3);40  }41  pager_cache_size db42} {2}43 44# At one point, repeatedly locking and unlocking the cache was causing45# a resource leak of one page per repetition. The page wasn't actually46# leaked, but would not be reused until the pager-cache was full (i.e. 47# 2000 pages by default).48#49# This tests that once the pager-cache is initialized, it can be locked50# and unlocked repeatedly without internally allocating any new pages.51#52set cache_size [pager_cache_size db]53for {set ii 0} {$ii < 10} {incr ii} {54  do_test cache-1.3.$ii {55    execsql {SELECT * FROM abc}56    pager_cache_size db57  } $::cache_size58}59 60#-------------------------------------------------------------------------61# This block of tests checks that it is possible to set the cache_size of a62# database to a small (< 10) value. More specifically:63#64#   cache-2.1.*: Test that "PRAGMA cache_size" appears to work with small 65#                values.66#   cache-2.2.*: Test that "PRAGMA main.cache_size" appears to work with 67#                small values.68#   cache-2.3.*: Test cache_size=1 correctly spills/flushes the cache. 69#   cache-2.4.*: Test cache_size=0 correctly spills/flushes the cache. 70#71#72db_delete_and_reopen73do_execsql_test cache-2.0 {74  PRAGMA auto_vacuum=OFF;75  PRAGMA journal_mode=DELETE;76  CREATE TABLE t1(a, b);77  CREATE TABLE t2(c, d);78  INSERT INTO t1 VALUES('x', 'y');79  INSERT INTO t2 VALUES('i', 'j');80} {delete}81 82for {set i 0} {$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" $i85  do_execsql_test cache-2.1.$i.3 "SELECT * FROM t1" {x y}86  do_execsql_test cache-2.1.$i.4 "PRAGMA cache_size" $i87}88for {set i 0} {$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" $i91  do_execsql_test cache-2.2.$i.3 "SELECT * FROM t1" {x y}92  do_execsql_test cache-2.2.$i.4 "PRAGMA main.cache_size" $i93}94 95# Tests for cache_size = 1.96#97do_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}103do_test cache-2.3.2 { pager_cache_size db } 2104do_execsql_test cache-2.3.3 {105    INSERT INTO t2 VALUES(1, 2);106    PRAGMA lock_status;107} {main exclusive temp closed}108do_test cache-2.3.4 { pager_cache_size db } 2109do_execsql_test cache-2.3.5 COMMIT110do_test cache-2.3.6 { pager_cache_size db } 1111 112do_execsql_test cache-2.3.7 {113  SELECT * FROM t1 UNION SELECT * FROM t2;114} {1 2 i j x y}115do_test cache-2.3.8 { pager_cache_size db } 1116 117# Tests for cache_size = 0.118#119do_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}125do_test cache-2.4.2 { pager_cache_size db } 2126do_execsql_test cache-2.4.3 {127    INSERT INTO t2 VALUES(1, 2);128    PRAGMA lock_status;129} {main exclusive temp closed}130do_test cache-2.4.4 { pager_cache_size db } 2131do_execsql_test cache-2.4.5 COMMIT132 133do_test cache-2.4.6 { pager_cache_size db } 0134do_execsql_test cache-2.4.7 {135  SELECT * FROM t1 UNION SELECT * FROM t2;136} {1 2 i j x y}137do_test cache-2.4.8 { pager_cache_size db } 0138 139sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)140finish_test141