sl@0: # 2008 August 29
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: #
sl@0: # This file is focused on testing the pcache module.
sl@0: #
sl@0: # $Id: pcache.test,v 1.2 2008/09/05 05:29:09 danielk1977 Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: 
sl@0: # The pcache module limits the number of pages available to purgeable
sl@0: # caches to the sum of the 'cache_size' values for the set of open
sl@0: # caches. This block of tests, pcache-1.*, test that the library behaves
sl@0: # corrctly when it is forced to exceed this limit.
sl@0: #
sl@0: do_test pcache-1.1 {
sl@0:   db close
sl@0:   pcache_stats
sl@0: } {current 0 max 0 min 0 recyclable 0}
sl@0: 
sl@0: do_test pcache-1.2 {
sl@0:   sqlite3 db test.db
sl@0:   execsql {
sl@0:     PRAGMA cache_size=10;
sl@0:     PRAGMA auto_vacuum=0;
sl@0:   }
sl@0:   pcache_stats
sl@0: } {current 1 max 10 min 10 recyclable 1}
sl@0: 
sl@0: do_test pcache-1.3 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     CREATE TABLE t1(a, b, c);
sl@0:     CREATE TABLE t2(a, b, c);
sl@0:     CREATE TABLE t3(a, b, c);
sl@0:     CREATE TABLE t4(a, b, c);
sl@0:     CREATE TABLE t5(a, b, c);
sl@0:   }
sl@0:   pcache_stats
sl@0: } {current 6 max 10 min 10 recyclable 0}
sl@0: 
sl@0: do_test pcache-1.4 {
sl@0:   execsql {
sl@0:     CREATE TABLE t6(a, b, c);
sl@0:     CREATE TABLE t7(a, b, c);
sl@0:     CREATE TABLE t8(a, b, c);
sl@0:     CREATE TABLE t9(a, b, c);
sl@0:   }
sl@0:   pcache_stats
sl@0: } {current 10 max 10 min 10 recyclable 0}
sl@0: 
sl@0: do_test pcache-1.5 {
sl@0:   sqlite3 db2 test.db
sl@0:   execsql "PRAGMA cache_size=10" db2
sl@0:   pcache_stats
sl@0: } {current 11 max 20 min 20 recyclable 1}
sl@0: 
sl@0: do_test pcache-1.6 {
sl@0:   execsql {
sl@0:     BEGIN;
sl@0:     SELECT * FROM sqlite_master;
sl@0:   } db2
sl@0:   pcache_stats
sl@0: } {current 11 max 20 min 20 recyclable 0}
sl@0: 
sl@0: # At this point connection db2 has a read lock on the database file and a 
sl@0: # single pinned page in its cache. Connection [db] is holding 10 dirty 
sl@0: # pages. It cannot recycle them because of the read lock held by db2.
sl@0: #
sl@0: do_test pcache-1.6 {
sl@0:   execsql {
sl@0:     CREATE INDEX i1 ON t1(a, b);
sl@0:     CREATE INDEX i2 ON t2(a, b);
sl@0:     CREATE INDEX i3 ON t3(a, b);
sl@0:     CREATE INDEX i4 ON t4(a, b);
sl@0:     CREATE INDEX i5 ON t5(a, b);
sl@0:     CREATE INDEX i6 ON t6(a, b);
sl@0:     CREATE INDEX i7 ON t7(a, b);
sl@0:     CREATE INDEX i8 ON t8(a, b);
sl@0:     CREATE INDEX i9 ON t9(a, b);
sl@0:   } 
sl@0:   pcache_stats
sl@0: } {current 20 max 20 min 20 recyclable 0}
sl@0: 
sl@0: do_test pcache-1.7 {
sl@0:   execsql {
sl@0:     CREATE TABLE t10(a, b, c);
sl@0:   } 
sl@0:   pcache_stats
sl@0: } {current 21 max 20 min 20 recyclable 0}
sl@0: 
sl@0: # Rolling back the transaction held by db2 at this point releases a pinned
sl@0: # page. Because the number of allocated pages is greater than the 
sl@0: # configured maximum, this page should be freed immediately instead of
sl@0: # recycled.
sl@0: #
sl@0: do_test pcache-1.8 {
sl@0:   execsql {ROLLBACK} db2
sl@0:   pcache_stats
sl@0: } {current 20 max 20 min 20 recyclable 0}
sl@0: 
sl@0: do_test pcache-1.9 {
sl@0:   execsql COMMIT
sl@0:   pcache_stats
sl@0: } {current 20 max 20 min 20 recyclable 20}
sl@0: 
sl@0: do_test pcache-1.10 {
sl@0:   db2 close
sl@0:   pcache_stats
sl@0: } {current 10 max 10 min 10 recyclable 10}
sl@0: 
sl@0: do_test pcache-1.11 {
sl@0:   execsql { PRAGMA cache_size = 20 }
sl@0:   pcache_stats
sl@0: } {current 10 max 20 min 10 recyclable 10}
sl@0: 
sl@0: do_test pcache-1.12 {
sl@0:   execsql { 
sl@0:     SELECT * FROM t1 ORDER BY a; SELECT * FROM t1;
sl@0:     SELECT * FROM t2 ORDER BY a; SELECT * FROM t2;
sl@0:     SELECT * FROM t3 ORDER BY a; SELECT * FROM t3;
sl@0:     SELECT * FROM t4 ORDER BY a; SELECT * FROM t4;
sl@0:     SELECT * FROM t5 ORDER BY a; SELECT * FROM t5;
sl@0:     SELECT * FROM t6 ORDER BY a; SELECT * FROM t6;
sl@0:     SELECT * FROM t7 ORDER BY a; SELECT * FROM t7;
sl@0:     SELECT * FROM t8 ORDER BY a; SELECT * FROM t8;
sl@0:     SELECT * FROM t9 ORDER BY a; SELECT * FROM t9;
sl@0:   }
sl@0:   pcache_stats
sl@0: } {current 19 max 20 min 10 recyclable 19}
sl@0: 
sl@0: do_test pcache-1.13 {
sl@0:   execsql { PRAGMA cache_size = 15 }
sl@0:   pcache_stats
sl@0: } {current 15 max 15 min 10 recyclable 15}
sl@0: 
sl@0: finish_test
sl@0: