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# 2011 November 16
#
# 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 contains test cases for sqlite3_db_release_memory and
# the PRAGMA shrink_memory statement.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
test_set_config_pagecache 0 0
if {[sqlite3_memory_used]==0} {
# SQLITE_DEFAULT_MEMSTATUS=0 build.
finish_test
return
}
unset -nocomplain baseline
do_test shrink-1.1 {
db eval {
PRAGMA cache_size = 2000;
CREATE TABLE t1(x,y);
INSERT INTO t1 VALUES(randomblob(1000000),1);
}
set ::baseline [sqlite3_memory_used]
# EVIDENCE-OF: R-58814-63508 The sqlite3_db_release_memory(D) interface
# attempts to free as much heap memory as possible from database
# connection D.
sqlite3_db_release_memory db
expr {$::baseline > [sqlite3_memory_used]+500000}
} {1}
do_test shrink-1.2 {
set baseline [sqlite3_memory_used]
db eval {
UPDATE t1 SET y=y+1;
}
expr {$::baseline+500000 < [sqlite3_memory_used]}
} {1}
do_test shrink-1.3 {
set baseline [sqlite3_memory_used]
db eval {PRAGMA shrink_memory}
expr {$::baseline > [sqlite3_memory_used]+500000}
} {1}
test_restore_config_pagecache
finish_test
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