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.
17 set testdir [file dirname $argv0]
18 source $testdir/tester.tcl
19 set testprefix vacuummem
21 if {[permutation]=="memsubsys1"} {
26 # If ENABLE_MEMORY_MANAGEMENT is defined, when VACUUM is run the temp db
27 # is able to borrow space from the main db (and it does, because the
28 # temp db is configure with a very small cache). When the VACUUM is
29 # finished and the temp db closed, all the page-cache memory currently
30 # assigned to the temp db is freed. If ENABLE_MEMORY_MANAGEMENT is defined
31 # this causes the total memory usage to drop much more than expected,
32 # causing tests in this file to fail.
34 ifcapable memorymanage {
41 set stat [sqlite3_status SQLITE_STATUS_MEMORY_USED 1]
46 PRAGMA cache_size = -2000;
47 CREATE TABLE t1(a, b, c);
50 SELECT 1 UNION ALL SELECT i+1 FROM r WHERE i<100000
52 INSERT INTO t1 SELECT randomblob(100),randomblob(100),randomblob(100) FROM r;
54 CREATE INDEX t1a ON t1(a);
55 CREATE INDEX t1b ON t1(b);
56 CREATE INDEX t1c ON t1(c);
58 set ans "#/[memory_used]/"
60 do_test 1.1 { memory_used } $ans
62 do_execsql_test 1.2 VACUUM
64 do_test 1.3 { memory_used } $ans
67 SELECT count(*) FROM t1 WHERE +a IS NOT NULL
70 do_test 1.5 { memory_used } $ans