3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
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.
10 #***********************************************************************
11 # This file implements regression tests for SQLite library. The
12 # focus of this file is testing that the VACUUM statement correctly
13 # frees any memory used for a temporary cache.
16 set testdir [file dirname $argv0]
17 source $testdir/tester.tcl
18 set testprefix vacuummem
20 if {[permutation]=="memsubsys1"} {
25 # If ENABLE_MEMORY_MANAGEMENT is defined, when VACUUM is run the temp db
26 # is able to borrow space from the main db (and it does, because the
27 # temp db is configure with a very small cache). When the VACUUM is
28 # finished and the temp db closed, all the page-cache memory currently
29 # assigned to the temp db is freed. If ENABLE_MEMORY_MANAGEMENT is defined
30 # this causes the total memory usage to drop much more than expected,
31 # causing tests in this file to fail.
33 ifcapable memorymanage {
40 set stat [sqlite3_status SQLITE_STATUS_MEMORY_USED 1]
45 PRAGMA cache_size = -2000;
46 CREATE TABLE t1(a, b, c);
49 SELECT 1 UNION ALL SELECT i+1 FROM r WHERE i<100000
51 INSERT INTO t1 SELECT randomblob(100),randomblob(100),randomblob(100) FROM r;
53 CREATE INDEX t1a ON t1(a);
54 CREATE INDEX t1b ON t1(b);
55 CREATE INDEX t1c ON t1(c);
57 set ans "#/[memory_used]/"
59 do_test 1.1 { memory_used } $ans
61 do_execsql_test 1.2 VACUUM
63 do_test 1.3 { memory_used } $ans
66 SELECT count(*) FROM t1 WHERE +a IS NOT NULL
69 do_test 1.5 { memory_used } $ans