# 2005 February 15
#
# 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.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this file is testing that the VACUUM statement correctly
# frees any memory used for a temporary cache.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix vacuummem
if {[permutation]=="memsubsys1"} {
finish_test
return
}
# If ENABLE_MEMORY_MANAGEMENT is defined, when VACUUM is run the temp db
# is able to borrow space from the main db (and it does, because the
# temp db is configure with a very small cache). When the VACUUM is
# finished and the temp db closed, all the page-cache memory currently
# assigned to the temp db is freed. If ENABLE_MEMORY_MANAGEMENT is defined
# this causes the total memory usage to drop much more than expected,
# causing tests in this file to fail.
#
ifcapable memorymanage {
finish_test
return
}
proc memory_used {} {
set stat [sqlite3_status SQLITE_STATUS_MEMORY_USED 1]
lindex $stat 1
}
do_execsql_test 1.0 {
PRAGMA cache_size = -2000;
CREATE TABLE t1(a, b, c);
WITH r(i) AS (
SELECT 1 UNION ALL SELECT i+1 FROM r WHERE i<100000
)
INSERT INTO t1 SELECT randomblob(100),randomblob(100),randomblob(100) FROM r;
CREATE INDEX t1a ON t1(a);
CREATE INDEX t1b ON t1(b);
CREATE INDEX t1c ON t1(c);
}
set ans "#/[memory_used]/"
do_test 1.1 { memory_used } $ans
do_execsql_test 1.2 VACUUM
do_test 1.3 { memory_used } $ans
do_execsql_test 1.4 {
SELECT count(*) FROM t1 WHERE +a IS NOT NULL
} {100000}
do_test 1.5 { memory_used } $ans
finish_test