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