# 2008 August 29 # # 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. # #*********************************************************************** # # This file is focused on testing the pcache module. # # $Id: pcache.test,v 1.5 2009/05/08 06:52:48 danielk1977 Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # The pcache module limits the number of pages available to purgeable # caches to the sum of the 'cache_size' values for the set of open # caches. This block of tests, pcache-1.*, test that the library behaves # corrctly when it is forced to exceed this limit. # do_test pcache-1.1 { db close pcache_stats } {current 0 max 0 min 0 recyclable 0} do_test pcache-1.2 { sqlite3 db test.db execsql { PRAGMA cache_size=12; PRAGMA auto_vacuum=0; } pcache_stats } {current 1 max 12 min 10 recyclable 1} do_test pcache-1.3 { execsql { BEGIN; CREATE TABLE t1(a, b, c); CREATE TABLE t2(a, b, c); CREATE TABLE t3(a, b, c); CREATE TABLE t4(a, b, c); CREATE TABLE t5(a, b, c); } pcache_stats } {current 6 max 12 min 10 recyclable 0} do_test pcache-1.4 { execsql { CREATE TABLE t6(a, b, c); CREATE TABLE t7(a, b, c); CREATE TABLE t8(a, b, c); CREATE TABLE t9(a, b, c); } pcache_stats } {current 10 max 12 min 10 recyclable 0} do_test pcache-1.5 { sqlite3 db2 test.db execsql "PRAGMA cache_size=10" db2 pcache_stats } {current 11 max 22 min 20 recyclable 1} do_test pcache-1.6.1 { execsql { BEGIN; SELECT * FROM sqlite_master; } db2 pcache_stats } {current 11 max 22 min 20 recyclable 0} # At this point connection db2 has a read lock on the database file and a # single pinned page in its cache. Connection [db] is holding 10 dirty # pages. It cannot recycle them because of the read lock held by db2. # do_test pcache-1.6.2 { execsql { CREATE INDEX i1 ON t1(a, b); CREATE INDEX i2 ON t2(a, b); CREATE INDEX i3 ON t3(a, b); CREATE INDEX i4 ON t4(a, b); CREATE INDEX i5 ON t5(a, b); CREATE INDEX i6 ON t6(a, b); CREATE INDEX i7 ON t7(a, b); CREATE INDEX i8 ON t8(a, b); CREATE INDEX i9 ON t9(a, b); CREATE INDEX i10 ON t9(a, b); CREATE INDEX i11 ON t9(a, b); } pcache_stats } {current 23 max 22 min 20 recyclable 0} do_test pcache-1.7 { execsql { CREATE TABLE t10(a, b, c); } pcache_stats } {current 24 max 22 min 20 recyclable 0} # Rolling back the transaction held by db2 at this point releases a pinned # page. Because the number of allocated pages is greater than the # configured maximum, this page should be freed immediately instead of # recycled. # do_test pcache-1.8 { execsql {ROLLBACK} db2 pcache_stats } {current 23 max 22 min 20 recyclable 0} do_test pcache-1.9 { execsql COMMIT pcache_stats } {current 22 max 22 min 20 recyclable 22} do_test pcache-1.10 { db2 close pcache_stats } {current 12 max 12 min 10 recyclable 12} do_test pcache-1.11 { execsql { PRAGMA cache_size = 20 } pcache_stats } {current 12 max 20 min 10 recyclable 12} do_test pcache-1.12 { execsql { SELECT * FROM t1 ORDER BY a; SELECT * FROM t1; SELECT * FROM t2 ORDER BY a; SELECT * FROM t2; SELECT * FROM t3 ORDER BY a; SELECT * FROM t3; SELECT * FROM t4 ORDER BY a; SELECT * FROM t4; SELECT * FROM t5 ORDER BY a; SELECT * FROM t5; SELECT * FROM t6 ORDER BY a; SELECT * FROM t6; SELECT * FROM t7 ORDER BY a; SELECT * FROM t7; SELECT * FROM t8 ORDER BY a; SELECT * FROM t8; SELECT * FROM t9 ORDER BY a; SELECT * FROM t9; } pcache_stats } {current 19 max 20 min 10 recyclable 19} do_test pcache-1.13 { execsql { PRAGMA cache_size = 15 } pcache_stats } {current 15 max 15 min 10 recyclable 15} do_test pcache-1.14 { hexio_write test.db 24 [hexio_render_int32 1000] execsql { SELECT * FROM sqlite_master } pcache_stats } {current 2 max 15 min 10 recyclable 2} do_test pcache-1.15 { execsql { SELECT * FROM t1 ORDER BY a; SELECT * FROM t1; SELECT * FROM t2 ORDER BY a; SELECT * FROM t2; SELECT * FROM t3 ORDER BY a; SELECT * FROM t3; SELECT * FROM t4 ORDER BY a; SELECT * FROM t4; SELECT * FROM t5 ORDER BY a; SELECT * FROM t5; SELECT * FROM t6 ORDER BY a; SELECT * FROM t6; SELECT * FROM t7 ORDER BY a; SELECT * FROM t7; SELECT * FROM t8 ORDER BY a; SELECT * FROM t8; SELECT * FROM t9 ORDER BY a; SELECT * FROM t9; } pcache_stats } {current 14 max 15 min 10 recyclable 14} finish_test