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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 $
- set testdir [file dirname $argv0]
- source $testdir/tester.tcl
- ifcapable !pager_pragmas||!compound {
- 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 $stats(page)
- }
- if {[permutation] == ""} {
- do_test cache-1.1 { pager_cache_size db } {0}
- }
- do_test cache-1.2 {
- execsql {
- PRAGMA auto_vacuum=OFF;
- CREATE TABLE abc(a, b, c);
- INSERT INTO abc VALUES(1, 2, 3);
- }
- pager_cache_size db
- } {2}
- # At one point, repeatedly locking and unlocking the cache was causing
- # a resource leak of one page per repetition. The page wasn't actually
- # leaked, but would not be reused until the pager-cache was full (i.e.
- # 2000 pages by default).
- #
- # This tests that once the pager-cache is initialized, it can be locked
- # and unlocked repeatedly without internally allocating any new pages.
- #
- set cache_size [pager_cache_size db]
- for {set ii 0} {$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
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