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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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