# 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" $i } # Tests for cache_size = 1. # do_execsql_test cache-2.3.1 { PRAGMA cache_size = 1; BEGIN; INSERT INTO t1 VALUES(1, 2); PRAGMA lock_status; } {main reserved temp closed} do_test cache-2.3.2 { pager_cache_size db } 2 do_execsql_test cache-2.3.3 { INSERT INTO t2 VALUES(1, 2); PRAGMA lock_status; } {main exclusive temp closed} do_test cache-2.3.4 { pager_cache_size db } 2 do_execsql_test cache-2.3.5 COMMIT if !$::sqlite_options(enable_purgeable_pcache) { # purgeable pcache doesn't share cache between connections 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} if !$::sqlite_options(enable_purgeable_pcache) { # purgeable pcache doesn't share cache between connections do_test cache-2.3.8 { pager_cache_size db } 1 } # Tests for cache_size = 0. # do_execsql_test cache-2.4.1 { PRAGMA cache_size = 0; BEGIN; INSERT INTO t1 VALUES(1, 2); PRAGMA lock_status; } {main reserved temp closed} do_test cache-2.4.2 { pager_cache_size db } 2 do_execsql_test cache-2.4.3 { INSERT INTO t2 VALUES(1, 2); PRAGMA lock_status; } {main exclusive temp closed} do_test cache-2.4.4 { pager_cache_size db } 2 do_execsql_test cache-2.4.5 COMMIT if !$::sqlite_options(enable_purgeable_pcache) { # purgeable pcache doesn't share cache between connections 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} if !$::sqlite_options(enable_purgeable_pcache) { # purgeable pcache doesn't share cache between connections do_test cache-2.4.8 { pager_cache_size db } 0 } sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit) finish_test