396 lines
12 KiB
Plaintext
396 lines
12 KiB
Plaintext
|
# 2005 November 30
|
||
|
|
#
|
||
|
|
# 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 focused on the two memory-management APIs,
|
||
|
|
# sqlite3_soft_heap_limit() and sqlite3_release_memory().
|
||
|
|
#
|
||
|
|
# Prior to version 3.6.2, calling sqlite3_release_memory() or exceeding
|
||
|
|
# the configured soft heap limit could cause sqlite to upgrade database
|
||
|
|
# locks and flush dirty pages to the file system. As of 3.6.2, this is
|
||
|
|
# no longer the case. In version 3.6.2, sqlite3_release_memory() only
|
||
|
|
# reclaims clean pages. This test file has been updated accordingly.
|
||
|
|
#
|
||
|
|
# $Id: malloc5.test,v 1.22 2009/04/11 19:09:54 drh Exp $
|
||
|
|
|
||
|
|
set testdir [file dirname $argv0]
|
||
|
|
source $testdir/tester.tcl
|
||
|
|
source $testdir/malloc_common.tcl
|
||
|
|
db close
|
||
|
|
|
||
|
|
# Only run these tests if memory debugging is turned on.
|
||
|
|
#
|
||
|
|
if {!$MEMDEBUG} {
|
||
|
|
puts "Skipping malloc5 tests: not compiled with -DSQLITE_MEMDEBUG..."
|
||
|
|
finish_test
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
# Skip these tests if OMIT_MEMORY_MANAGEMENT was defined at compile time.
|
||
|
|
ifcapable !memorymanage {
|
||
|
|
finish_test
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
sqlite3_soft_heap_limit 0
|
||
|
|
sqlite3 db test.db
|
||
|
|
|
||
|
|
do_test malloc5-1.1 {
|
||
|
|
# Simplest possible test. Call sqlite3_release_memory when there is exactly
|
||
|
|
# one unused page in a single pager cache. The page cannot be freed, as
|
||
|
|
# it is dirty. So sqlite3_release_memory() returns 0.
|
||
|
|
#
|
||
|
|
execsql {
|
||
|
|
PRAGMA auto_vacuum=OFF;
|
||
|
|
BEGIN;
|
||
|
|
CREATE TABLE abc(a, b, c);
|
||
|
|
}
|
||
|
|
sqlite3_release_memory
|
||
|
|
} {0}
|
||
|
|
|
||
|
|
do_test malloc5-1.2 {
|
||
|
|
# Test that the transaction started in the above test is still active.
|
||
|
|
# The lock on the database file should not have been upgraded (this was
|
||
|
|
# not the case before version 3.6.2).
|
||
|
|
#
|
||
|
|
sqlite3 db2 test.db
|
||
|
|
execsql { SELECT * FROM sqlite_master } db2
|
||
|
|
} {}
|
||
|
|
do_test malloc5-1.3 {
|
||
|
|
# Call [sqlite3_release_memory] when there is exactly one unused page
|
||
|
|
# in the cache belonging to db2.
|
||
|
|
#
|
||
|
|
set ::pgalloc [sqlite3_release_memory]
|
||
|
|
expr $::pgalloc > 0
|
||
|
|
} {1}
|
||
|
|
|
||
|
|
do_test malloc5-1.4 {
|
||
|
|
# Commit the transaction and open a new one. Read 1 page into the cache.
|
||
|
|
# Because the page is not dirty, it is eligible for collection even
|
||
|
|
# before the transaction is concluded.
|
||
|
|
#
|
||
|
|
execsql {
|
||
|
|
COMMIT;
|
||
|
|
BEGIN;
|
||
|
|
SELECT * FROM abc;
|
||
|
|
}
|
||
|
|
sqlite3_release_memory
|
||
|
|
} $::pgalloc
|
||
|
|
|
||
|
|
do_test malloc5-1.5 {
|
||
|
|
# Conclude the transaction opened in the previous [do_test] block. This
|
||
|
|
# causes another page (page 1) to become eligible for recycling.
|
||
|
|
#
|
||
|
|
execsql { COMMIT }
|
||
|
|
sqlite3_release_memory
|
||
|
|
} $::pgalloc
|
||
|
|
|
||
|
|
do_test malloc5-1.6 {
|
||
|
|
# Manipulate the cache so that it contains two unused pages. One requires
|
||
|
|
# a journal-sync to free, the other does not.
|
||
|
|
db2 close
|
||
|
|
execsql {
|
||
|
|
BEGIN;
|
||
|
|
SELECT * FROM abc;
|
||
|
|
CREATE TABLE def(d, e, f);
|
||
|
|
}
|
||
|
|
sqlite3_release_memory 500
|
||
|
|
} $::pgalloc
|
||
|
|
|
||
|
|
do_test malloc5-1.7 {
|
||
|
|
# Database should not be locked this time.
|
||
|
|
sqlite3 db2 test.db
|
||
|
|
catchsql { SELECT * FROM abc } db2
|
||
|
|
} {0 {}}
|
||
|
|
do_test malloc5-1.8 {
|
||
|
|
# Try to release another block of memory. This will fail as the only
|
||
|
|
# pages currently in the cache are dirty (page 3) or pinned (page 1).
|
||
|
|
db2 close
|
||
|
|
sqlite3_release_memory 500
|
||
|
|
} 0
|
||
|
|
do_test malloc5-1.8 {
|
||
|
|
# Database is still not locked.
|
||
|
|
#
|
||
|
|
sqlite3 db2 test.db
|
||
|
|
catchsql { SELECT * FROM abc } db2
|
||
|
|
} {0 {}}
|
||
|
|
do_test malloc5-1.9 {
|
||
|
|
execsql {
|
||
|
|
COMMIT;
|
||
|
|
}
|
||
|
|
} {}
|
||
|
|
|
||
|
|
do_test malloc5-2.1 {
|
||
|
|
# Put some data in tables abc and def. Both tables are still wholly
|
||
|
|
# contained within their root pages.
|
||
|
|
execsql {
|
||
|
|
INSERT INTO abc VALUES(1, 2, 3);
|
||
|
|
INSERT INTO abc VALUES(4, 5, 6);
|
||
|
|
INSERT INTO def VALUES(7, 8, 9);
|
||
|
|
INSERT INTO def VALUES(10,11,12);
|
||
|
|
}
|
||
|
|
} {}
|
||
|
|
do_test malloc5-2.2 {
|
||
|
|
# Load the root-page for table def into the cache. Then query table abc.
|
||
|
|
# Halfway through the query call sqlite3_release_memory(). The goal of this
|
||
|
|
# test is to make sure we don't free pages that are in use (specifically,
|
||
|
|
# the root of table abc).
|
||
|
|
sqlite3_release_memory
|
||
|
|
set nRelease 0
|
||
|
|
execsql {
|
||
|
|
BEGIN;
|
||
|
|
SELECT * FROM def;
|
||
|
|
}
|
||
|
|
set data [list]
|
||
|
|
db eval {SELECT * FROM abc} {
|
||
|
|
incr nRelease [sqlite3_release_memory]
|
||
|
|
lappend data $a $b $c
|
||
|
|
}
|
||
|
|
execsql {
|
||
|
|
COMMIT;
|
||
|
|
}
|
||
|
|
list $nRelease $data
|
||
|
|
} [list $pgalloc [list 1 2 3 4 5 6]]
|
||
|
|
|
||
|
|
do_test malloc5-3.1 {
|
||
|
|
# Simple test to show that if two pagers are opened from within this
|
||
|
|
# thread, memory is freed from both when sqlite3_release_memory() is
|
||
|
|
# called.
|
||
|
|
execsql {
|
||
|
|
BEGIN;
|
||
|
|
SELECT * FROM abc;
|
||
|
|
}
|
||
|
|
execsql {
|
||
|
|
SELECT * FROM sqlite_master;
|
||
|
|
BEGIN;
|
||
|
|
SELECT * FROM def;
|
||
|
|
} db2
|
||
|
|
sqlite3_release_memory
|
||
|
|
} [expr $::pgalloc * 2]
|
||
|
|
do_test malloc5-3.2 {
|
||
|
|
concat \
|
||
|
|
[execsql {SELECT * FROM abc; COMMIT}] \
|
||
|
|
[execsql {SELECT * FROM def; COMMIT} db2]
|
||
|
|
} {1 2 3 4 5 6 7 8 9 10 11 12}
|
||
|
|
|
||
|
|
db2 close
|
||
|
|
puts "Highwater mark: [sqlite3_memory_highwater]"
|
||
|
|
|
||
|
|
# The following two test cases each execute a transaction in which
|
||
|
|
# 10000 rows are inserted into table abc. The first test case is used
|
||
|
|
# to ensure that more than 1MB of dynamic memory is used to perform
|
||
|
|
# the transaction.
|
||
|
|
#
|
||
|
|
# The second test case sets the "soft-heap-limit" to 100,000 bytes (0.1 MB)
|
||
|
|
# and tests to see that this limit is not exceeded at any point during
|
||
|
|
# transaction execution.
|
||
|
|
#
|
||
|
|
# Before executing malloc5-4.* we save the value of the current soft heap
|
||
|
|
# limit in variable ::soft_limit. The original value is restored after
|
||
|
|
# running the tests.
|
||
|
|
#
|
||
|
|
set ::soft_limit [sqlite3_soft_heap_limit -1]
|
||
|
|
execsql {PRAGMA cache_size=2000}
|
||
|
|
do_test malloc5-4.1 {
|
||
|
|
execsql {BEGIN;}
|
||
|
|
execsql {DELETE FROM abc;}
|
||
|
|
for {set i 0} {$i < 10000} {incr i} {
|
||
|
|
execsql "INSERT INTO abc VALUES($i, $i, '[string repeat X 100]');"
|
||
|
|
}
|
||
|
|
execsql {COMMIT;}
|
||
|
|
db cache flush
|
||
|
|
sqlite3_release_memory
|
||
|
|
sqlite3_memory_highwater 1
|
||
|
|
execsql {SELECT * FROM abc}
|
||
|
|
set nMaxBytes [sqlite3_memory_highwater 1]
|
||
|
|
puts -nonewline " (Highwater mark: $nMaxBytes) "
|
||
|
|
expr $nMaxBytes > 1000000
|
||
|
|
} {1}
|
||
|
|
do_test malloc5-4.2 {
|
||
|
|
db cache flush
|
||
|
|
sqlite3_release_memory
|
||
|
|
sqlite3_soft_heap_limit 100000
|
||
|
|
sqlite3_memory_highwater 1
|
||
|
|
execsql {SELECT * FROM abc}
|
||
|
|
set nMaxBytes [sqlite3_memory_highwater 1]
|
||
|
|
puts -nonewline " (Highwater mark: $nMaxBytes) "
|
||
|
|
expr $nMaxBytes <= 110000
|
||
|
|
} {1}
|
||
|
|
do_test malloc5-4.3 {
|
||
|
|
# Check that the content of table abc is at least roughly as expected.
|
||
|
|
execsql {
|
||
|
|
SELECT count(*), sum(a), sum(b) FROM abc;
|
||
|
|
}
|
||
|
|
} [list 10000 [expr int(10000.0 * 4999.5)] [expr int(10000.0 * 4999.5)]]
|
||
|
|
|
||
|
|
# Restore the soft heap limit.
|
||
|
|
sqlite3_soft_heap_limit $::soft_limit
|
||
|
|
|
||
|
|
# Test that there are no problems calling sqlite3_release_memory when
|
||
|
|
# there are open in-memory databases.
|
||
|
|
#
|
||
|
|
# At one point these tests would cause a seg-fault.
|
||
|
|
#
|
||
|
|
do_test malloc5-5.1 {
|
||
|
|
db close
|
||
|
|
sqlite3 db :memory:
|
||
|
|
execsql {
|
||
|
|
BEGIN;
|
||
|
|
CREATE TABLE abc(a, b, c);
|
||
|
|
INSERT INTO abc VALUES('abcdefghi', 1234567890, NULL);
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
INSERT INTO abc SELECT * FROM abc;
|
||
|
|
}
|
||
|
|
sqlite3_release_memory
|
||
|
|
} 0
|
||
|
|
do_test malloc5-5.2 {
|
||
|
|
sqlite3_soft_heap_limit 5000
|
||
|
|
execsql {
|
||
|
|
COMMIT;
|
||
|
|
PRAGMA temp_store = memory;
|
||
|
|
SELECT * FROM abc ORDER BY a;
|
||
|
|
}
|
||
|
|
expr 1
|
||
|
|
} {1}
|
||
|
|
sqlite3_soft_heap_limit $::soft_limit
|
||
|
|
|
||
|
|
#-------------------------------------------------------------------------
|
||
|
|
# The following test cases (malloc5-6.*) test the new global LRU list
|
||
|
|
# used to determine the pages to recycle when sqlite3_release_memory is
|
||
|
|
# called and there is more than one pager open.
|
||
|
|
#
|
||
|
|
proc nPage {db} {
|
||
|
|
set bt [btree_from_db $db]
|
||
|
|
array set stats [btree_pager_stats $bt]
|
||
|
|
set stats(page)
|
||
|
|
}
|
||
|
|
db close
|
||
|
|
forcedelete test.db test.db-journal test2.db test2.db-journal
|
||
|
|
|
||
|
|
# This block of test-cases (malloc5-6.1.*) prepares two database files
|
||
|
|
# for the subsequent tests.
|
||
|
|
do_test malloc5-6.1.1 {
|
||
|
|
sqlite3 db test.db
|
||
|
|
execsql {
|
||
|
|
PRAGMA page_size=1024;
|
||
|
|
PRAGMA default_cache_size=10;
|
||
|
|
}
|
||
|
|
execsql {
|
||
|
|
PRAGMA temp_store = memory;
|
||
|
|
BEGIN;
|
||
|
|
CREATE TABLE abc(a PRIMARY KEY, b, c);
|
||
|
|
INSERT INTO abc VALUES(randstr(50,50), randstr(75,75), randstr(100,100));
|
||
|
|
INSERT INTO abc
|
||
|
|
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
|
||
|
|
INSERT INTO abc
|
||
|
|
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
|
||
|
|
INSERT INTO abc
|
||
|
|
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
|
||
|
|
INSERT INTO abc
|
||
|
|
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
|
||
|
|
INSERT INTO abc
|
||
|
|
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
|
||
|
|
INSERT INTO abc
|
||
|
|
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc;
|
||
|
|
COMMIT;
|
||
|
|
}
|
||
|
|
forcecopy test.db test2.db
|
||
|
|
sqlite3 db2 test2.db
|
||
|
|
list \
|
||
|
|
[expr ([file size test.db]/1024)>20] [expr ([file size test2.db]/1024)>20]
|
||
|
|
} {1 1}
|
||
|
|
do_test malloc5-6.1.2 {
|
||
|
|
list [execsql {PRAGMA cache_size}] [execsql {PRAGMA cache_size} db2]
|
||
|
|
} {10 10}
|
||
|
|
|
||
|
|
do_test malloc5-6.2.1 {
|
||
|
|
execsql {SELECT * FROM abc} db2
|
||
|
|
execsql {SELECT * FROM abc} db
|
||
|
|
expr [nPage db] + [nPage db2]
|
||
|
|
} {20}
|
||
|
|
|
||
|
|
do_test malloc5-6.2.2 {
|
||
|
|
# If we now try to reclaim some memory, it should come from the db2 cache.
|
||
|
|
sqlite3_release_memory 3000
|
||
|
|
expr [nPage db] + [nPage db2]
|
||
|
|
} {17}
|
||
|
|
do_test malloc5-6.2.3 {
|
||
|
|
# Access the db2 cache again, so that all the db2 pages have been used
|
||
|
|
# more recently than all the db pages. Then try to reclaim 3000 bytes.
|
||
|
|
# This time, 3 pages should be pulled from the db cache.
|
||
|
|
execsql { SELECT * FROM abc } db2
|
||
|
|
sqlite3_release_memory 3000
|
||
|
|
expr [nPage db] + [nPage db2]
|
||
|
|
} {17}
|
||
|
|
|
||
|
|
do_test malloc5-6.3.1 {
|
||
|
|
# Now open a transaction and update 2 pages in the db2 cache. Then
|
||
|
|
# do a SELECT on the db cache so that all the db pages are more recently
|
||
|
|
# used than the db2 pages. When we try to free memory, SQLite should
|
||
|
|
# free the non-dirty db2 pages, then the db pages, then finally use
|
||
|
|
# sync() to free up the dirty db2 pages. The only page that cannot be
|
||
|
|
# freed is page1 of db2. Because there is an open transaction, the
|
||
|
|
# btree layer holds a reference to page 1 in the db2 cache.
|
||
|
|
execsql {
|
||
|
|
BEGIN;
|
||
|
|
UPDATE abc SET c = randstr(100,100)
|
||
|
|
WHERE rowid = 1 OR rowid = (SELECT max(rowid) FROM abc);
|
||
|
|
} db2
|
||
|
|
execsql { SELECT * FROM abc } db
|
||
|
|
expr [nPage db] + [nPage db2]
|
||
|
|
} {20}
|
||
|
|
do_test malloc5-6.3.2 {
|
||
|
|
# Try to release 7700 bytes. This should release all the
|
||
|
|
# non-dirty pages held by db2.
|
||
|
|
sqlite3_release_memory [expr 7*1132]
|
||
|
|
list [nPage db] [nPage db2]
|
||
|
|
} {10 3}
|
||
|
|
do_test malloc5-6.3.3 {
|
||
|
|
# Try to release another 1000 bytes. This should come fromt the db
|
||
|
|
# cache, since all three pages held by db2 are either in-use or diry.
|
||
|
|
sqlite3_release_memory 1000
|
||
|
|
list [nPage db] [nPage db2]
|
||
|
|
} {9 3}
|
||
|
|
do_test malloc5-6.3.4 {
|
||
|
|
# Now release 9900 more (about 9 pages worth). This should expunge
|
||
|
|
# the rest of the db cache. But the db2 cache remains intact, because
|
||
|
|
# SQLite tries to avoid calling sync().
|
||
|
|
if {$::tcl_platform(wordSize)==8} {
|
||
|
|
sqlite3_release_memory 10500
|
||
|
|
} else {
|
||
|
|
sqlite3_release_memory 9900
|
||
|
|
}
|
||
|
|
list [nPage db] [nPage db2]
|
||
|
|
} {0 3}
|
||
|
|
do_test malloc5-6.3.5 {
|
||
|
|
# But if we are really insistent, SQLite will consent to call sync()
|
||
|
|
# if there is no other option. UPDATE: As of 3.6.2, SQLite will not
|
||
|
|
# call sync() in this scenario. So no further memory can be reclaimed.
|
||
|
|
sqlite3_release_memory 1000
|
||
|
|
list [nPage db] [nPage db2]
|
||
|
|
} {0 3}
|
||
|
|
do_test malloc5-6.3.6 {
|
||
|
|
# The referenced page (page 1 of the db2 cache) will not be freed no
|
||
|
|
# matter how much memory we ask for:
|
||
|
|
sqlite3_release_memory 31459
|
||
|
|
list [nPage db] [nPage db2]
|
||
|
|
} {0 3}
|
||
|
|
|
||
|
|
db2 close
|
||
|
|
|
||
|
|
sqlite3_soft_heap_limit $::soft_limit
|
||
|
|
finish_test
|
||
|
|
catch {db close}
|