/trunk/test/cache.test |
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# 2007 March 24 |
# |
# The author disclaims copyright to this source code. In place of |
# a legal notice, here is a blessing: |
# |
# May you do good and not evil. |
# May you find forgiveness for yourself and forgive others. |
# May you share freely, never taking more than you give. |
# |
#*********************************************************************** |
# |
# $Id: cache.test,v 1.4 2007/08/22 02:56:44 drh Exp $ |
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set testdir [file dirname $argv0] |
source $testdir/tester.tcl |
|
ifcapable {!pager_pragmas} { |
finish_test |
return |
} |
sqlite3_soft_heap_limit 0 |
|
proc pager_cache_size {db} { |
set bt [btree_from_db $db] |
db_enter $db |
array set stats [btree_pager_stats $bt] |
db_leave $db |
return $stats(page) |
} |
|
if {[permutation] == ""} { |
do_test cache-1.1 { pager_cache_size db } {0} |
} |
|
do_test cache-1.2 { |
execsql { |
PRAGMA auto_vacuum=OFF; |
CREATE TABLE abc(a, b, c); |
INSERT INTO abc VALUES(1, 2, 3); |
} |
pager_cache_size db |
} {2} |
|
# At one point, repeatedly locking and unlocking the cache was causing |
# a resource leak of one page per repetition. The page wasn't actually |
# leaked, but would not be reused until the pager-cache was full (i.e. |
# 2000 pages by default). |
# |
# This tests that once the pager-cache is initialised, it can be locked |
# and unlocked repeatedly without internally allocating any new pages. |
# |
set cache_size [pager_cache_size db] |
for {set ii 0} {$ii < 10} {incr ii} { |
do_test cache-1.3.$ii { |
execsql {SELECT * FROM abc} |
pager_cache_size db |
} $::cache_size |
} |
|
#------------------------------------------------------------------------- |
# This block of tests checks that it is possible to set the cache_size of a |
# database to a small (< 10) value. More specifically: |
# |
# cache-2.1.*: Test that "PRAGMA cache_size" appears to work with small |
# values. |
# cache-2.2.*: Test that "PRAGMA main.cache_size" appears to work with |
# small values. |
# cache-2.3.*: Test cache_size=1 correctly spills/flushes the cache. |
# cache-2.4.*: Test cache_size=0 correctly spills/flushes the cache. |
# |
# |
db_delete_and_reopen |
do_execsql_test cache-2.0 { |
PRAGMA auto_vacuum=OFF; |
PRAGMA journal_mode=DELETE; |
CREATE TABLE t1(a, b); |
CREATE TABLE t2(c, d); |
INSERT INTO t1 VALUES('x', 'y'); |
INSERT INTO t2 VALUES('i', 'j'); |
} {delete} |
|
for {set i 0} {$i < 20} {incr i} { |
do_execsql_test cache-2.1.$i.1 "PRAGMA cache_size = $i" |
do_execsql_test cache-2.1.$i.2 "PRAGMA cache_size" $i |
do_execsql_test cache-2.1.$i.3 "SELECT * FROM t1" {x y} |
do_execsql_test cache-2.1.$i.4 "PRAGMA cache_size" $i |
} |
for {set i 0} {$i < 20} {incr i} { |
do_execsql_test cache-2.2.$i.1 "PRAGMA main.cache_size = $i" |
do_execsql_test cache-2.2.$i.2 "PRAGMA main.cache_size" $i |
do_execsql_test cache-2.2.$i.3 "SELECT * FROM t1" {x y} |
do_execsql_test cache-2.2.$i.4 "PRAGMA main.cache_size" $i |
} |
|
# Tests for cache_size = 1. |
# |
do_execsql_test cache-2.3.1 { |
PRAGMA cache_size = 1; |
BEGIN; |
INSERT INTO t1 VALUES(1, 2); |
PRAGMA lock_status; |
} {main reserved temp closed} |
do_test cache-2.3.2 { pager_cache_size db } 2 |
do_execsql_test cache-2.3.3 { |
INSERT INTO t2 VALUES(1, 2); |
PRAGMA lock_status; |
} {main exclusive temp closed} |
do_test cache-2.3.4 { pager_cache_size db } 2 |
do_execsql_test cache-2.3.5 COMMIT |
do_test cache-2.3.6 { pager_cache_size db } 1 |
|
do_execsql_test cache-2.3.7 { |
SELECT * FROM t1 UNION SELECT * FROM t2; |
} {1 2 i j x y} |
do_test cache-2.3.8 { pager_cache_size db } 1 |
|
# Tests for cache_size = 0. |
# |
do_execsql_test cache-2.4.1 { |
PRAGMA cache_size = 0; |
BEGIN; |
INSERT INTO t1 VALUES(1, 2); |
PRAGMA lock_status; |
} {main reserved temp closed} |
do_test cache-2.4.2 { pager_cache_size db } 2 |
do_execsql_test cache-2.4.3 { |
INSERT INTO t2 VALUES(1, 2); |
PRAGMA lock_status; |
} {main exclusive temp closed} |
do_test cache-2.4.4 { pager_cache_size db } 2 |
do_execsql_test cache-2.4.5 COMMIT |
|
do_test cache-2.4.6 { pager_cache_size db } 0 |
do_execsql_test cache-2.4.7 { |
SELECT * FROM t1 UNION SELECT * FROM t2; |
} {1 2 i j x y} |
do_test cache-2.4.8 { pager_cache_size db } 0 |
|
sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit) |
finish_test |