| # 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 $ |
| |
| 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 |