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| 1 # 2011 November 16 | |
| 2 # | |
| 3 # The author disclaims copyright to this source code. In place of | |
| 4 # a legal notice, here is a blessing: | |
| 5 # | |
| 6 # May you do good and not evil. | |
| 7 # May you find forgiveness for yourself and forgive others. | |
| 8 # May you share freely, never taking more than you give. | |
| 9 # | |
| 10 #*********************************************************************** | |
| 11 # | |
| 12 # This file contains test cases for sqlite3_db_release_memory and | |
| 13 # the PRAGMA shrink_memory statement. | |
| 14 # | |
| 15 | |
| 16 set testdir [file dirname $argv0] | |
| 17 source $testdir/tester.tcl | |
| 18 test_set_config_pagecache 0 0 | |
| 19 | |
| 20 unset -nocomplain baseline | |
| 21 do_test shrink-1.1 { | |
| 22 db eval { | |
| 23 PRAGMA cache_size = 2000; | |
| 24 CREATE TABLE t1(x,y); | |
| 25 INSERT INTO t1 VALUES(randomblob(1000000),1); | |
| 26 } | |
| 27 set ::baseline sqlite3_memory_used | |
| 28 # EVIDENCE-OF: R-58814-63508 The sqlite3_db_release_memory(D) interface | |
| 29 # attempts to free as much heap memory as possible from database | |
| 30 # connection D. | |
| 31 sqlite3_db_release_memory db | |
| 32 expr {$::baseline > [sqlite3_memory_used]+500000} | |
| 33 } {1} | |
| 34 do_test shrink-1.2 { | |
| 35 set baseline [sqlite3_memory_used] | |
| 36 db eval { | |
| 37 UPDATE t1 SET y=y+1; | |
| 38 } | |
| 39 expr {$::baseline+500000 < [sqlite3_memory_used]} | |
| 40 } {1} | |
| 41 do_test shrink-1.3 { | |
| 42 set baseline [sqlite3_memory_used] | |
| 43 db eval {PRAGMA shrink_memory} | |
| 44 expr {$::baseline > [sqlite3_memory_used]+500000} | |
| 45 } {1} | |
| 46 | |
| 47 test_restore_config_pagecache | |
| 48 finish_test | |
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