author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:57:14 +0300 | |
branch | RCL_3 |
changeset 23 | 26645d81f48d |
parent 0 | 08ec8eefde2f |
permissions | -rw-r--r-- |
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# 2005 November 30 |
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# |
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# The author disclaims copyright to this source code. In place of |
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# a legal notice, here is a blessing: |
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# |
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# May you do good and not evil. |
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# May you find forgiveness for yourself and forgive others. |
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# May you share freely, never taking more than you give. |
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# |
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#*********************************************************************** |
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# |
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# This file contains test cases focused on the two memory-management APIs, |
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# sqlite3_soft_heap_limit() and sqlite3_release_memory(). |
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# |
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# Prior to version 3.6.2, calling sqlite3_release_memory() or exceeding |
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# the configured soft heap limit could cause sqlite to upgrade database |
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# locks and flush dirty pages to the file system. As of 3.6.2, this is |
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# no longer the case. In version 3.6.2, sqlite3_release_memory() only |
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# reclaims clean pages. This test file has been updated accordingly. |
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# |
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# $Id: malloc5.test,v 1.20 2008/08/27 16:38:57 danielk1977 Exp $ |
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set testdir [file dirname $argv0] |
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source $testdir/tester.tcl |
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source $testdir/malloc_common.tcl |
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db close |
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|
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# Only run these tests if memory debugging is turned on. |
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# |
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if {!$MEMDEBUG} { |
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puts "Skipping malloc5 tests: not compiled with -DSQLITE_MEMDEBUG..." |
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finish_test |
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return |
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} |
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# Skip these tests if OMIT_MEMORY_MANAGEMENT was defined at compile time. |
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ifcapable !memorymanage { |
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finish_test |
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return |
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} |
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sqlite3_soft_heap_limit 0 |
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sqlite3 db test.db |
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do_test malloc5-1.1 { |
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# Simplest possible test. Call sqlite3_release_memory when there is exactly |
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# one unused page in a single pager cache. The page cannot be freed, as |
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# it is dirty. So sqlite3_release_memory() returns 0. |
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# |
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execsql { |
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PRAGMA auto_vacuum=OFF; |
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BEGIN; |
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CREATE TABLE abc(a, b, c); |
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} |
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sqlite3_release_memory |
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} {0} |
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do_test malloc5-1.2 { |
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# Test that the transaction started in the above test is still active. |
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# The lock on the database file should not have been upgraded (this was |
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# not the case before version 3.6.2). |
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# |
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sqlite3 db2 test.db |
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execsql { SELECT * FROM sqlite_master } db2 |
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} {} |
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do_test malloc5-1.3 { |
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# Call [sqlite3_release_memory] when there is exactly one unused page |
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# in the cache belonging to db2. |
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# |
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set ::pgalloc [sqlite3_release_memory] |
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expr $::pgalloc > 0 |
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} {1} |
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do_test malloc5-1.4 { |
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# Commit the transaction and open a new one. Read 1 page into the cache. |
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# Because the page is not dirty, it is eligible for collection even |
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# before the transaction is concluded. |
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# |
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execsql { |
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COMMIT; |
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BEGIN; |
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SELECT * FROM abc; |
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} |
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sqlite3_release_memory |
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} $::pgalloc |
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do_test malloc5-1.5 { |
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# Conclude the transaction opened in the previous [do_test] block. This |
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# causes another page (page 1) to become eligible for recycling. |
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# |
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execsql { COMMIT } |
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sqlite3_release_memory |
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} $::pgalloc |
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do_test malloc5-1.6 { |
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# Manipulate the cache so that it contains two unused pages. One requires |
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# a journal-sync to free, the other does not. |
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db2 close |
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execsql { |
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BEGIN; |
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SELECT * FROM abc; |
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CREATE TABLE def(d, e, f); |
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103 |
} |
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sqlite3_release_memory 500 |
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} $::pgalloc |
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106 |
|
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do_test malloc5-1.7 { |
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# Database should not be locked this time. |
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sqlite3 db2 test.db |
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catchsql { SELECT * FROM abc } db2 |
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} {0 {}} |
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do_test malloc5-1.8 { |
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# Try to release another block of memory. This will fail as the only |
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# pages currently in the cache are dirty (page 3) or pinned (page 1). |
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db2 close |
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sqlite3_release_memory 500 |
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} 0 |
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do_test malloc5-1.8 { |
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# Database is still not locked. |
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# |
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sqlite3 db2 test.db |
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catchsql { SELECT * FROM abc } db2 |
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} {0 {}} |
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do_test malloc5-1.9 { |
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execsql { |
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COMMIT; |
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} |
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} {} |
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129 |
|
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do_test malloc5-2.1 { |
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# Put some data in tables abc and def. Both tables are still wholly |
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# contained within their root pages. |
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execsql { |
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INSERT INTO abc VALUES(1, 2, 3); |
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INSERT INTO abc VALUES(4, 5, 6); |
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INSERT INTO def VALUES(7, 8, 9); |
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INSERT INTO def VALUES(10,11,12); |
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} |
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} {} |
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do_test malloc5-2.2 { |
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# Load the root-page for table def into the cache. Then query table abc. |
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# Halfway through the query call sqlite3_release_memory(). The goal of this |
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# test is to make sure we don't free pages that are in use (specifically, |
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# the root of table abc). |
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sqlite3_release_memory |
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set nRelease 0 |
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execsql { |
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BEGIN; |
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SELECT * FROM def; |
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} |
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set data [list] |
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db eval {SELECT * FROM abc} { |
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incr nRelease [sqlite3_release_memory] |
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lappend data $a $b $c |
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} |
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execsql { |
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COMMIT; |
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} |
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list $nRelease $data |
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} [list $pgalloc [list 1 2 3 4 5 6]] |
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161 |
|
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do_test malloc5-3.1 { |
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# Simple test to show that if two pagers are opened from within this |
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# thread, memory is freed from both when sqlite3_release_memory() is |
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# called. |
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166 |
execsql { |
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BEGIN; |
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SELECT * FROM abc; |
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} |
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execsql { |
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SELECT * FROM sqlite_master; |
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BEGIN; |
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SELECT * FROM def; |
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} db2 |
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sqlite3_release_memory |
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} [expr $::pgalloc * 2] |
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do_test malloc5-3.2 { |
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concat \ |
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[execsql {SELECT * FROM abc; COMMIT}] \ |
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[execsql {SELECT * FROM def; COMMIT} db2] |
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} {1 2 3 4 5 6 7 8 9 10 11 12} |
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182 |
|
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db2 close |
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puts "Highwater mark: [sqlite3_memory_highwater]" |
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185 |
|
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# The following two test cases each execute a transaction in which |
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# 10000 rows are inserted into table abc. The first test case is used |
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# to ensure that more than 1MB of dynamic memory is used to perform |
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# the transaction. |
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# |
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# The second test case sets the "soft-heap-limit" to 100,000 bytes (0.1 MB) |
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# and tests to see that this limit is not exceeded at any point during |
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# transaction execution. |
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194 |
# |
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# Before executing malloc5-4.* we save the value of the current soft heap |
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# limit in variable ::soft_limit. The original value is restored after |
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# running the tests. |
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198 |
# |
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set ::soft_limit [sqlite3_soft_heap_limit -1] |
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execsql {PRAGMA cache_size=2000} |
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do_test malloc5-4.1 { |
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execsql {BEGIN;} |
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execsql {DELETE FROM abc;} |
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for {set i 0} {$i < 10000} {incr i} { |
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execsql "INSERT INTO abc VALUES($i, $i, '[string repeat X 100]');" |
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206 |
} |
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207 |
execsql {COMMIT;} |
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208 |
sqlite3_release_memory |
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sqlite3_memory_highwater 1 |
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execsql {SELECT * FROM abc} |
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set nMaxBytes [sqlite3_memory_highwater 1] |
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puts -nonewline " (Highwater mark: $nMaxBytes) " |
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expr $nMaxBytes > 1000000 |
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} {1} |
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do_test malloc5-4.2 { |
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sqlite3_release_memory |
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sqlite3_soft_heap_limit 100000 |
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sqlite3_memory_highwater 1 |
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execsql {SELECT * FROM abc} |
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set nMaxBytes [sqlite3_memory_highwater 1] |
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puts -nonewline " (Highwater mark: $nMaxBytes) " |
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expr $nMaxBytes <= 100000 |
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} {1} |
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do_test malloc5-4.3 { |
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# Check that the content of table abc is at least roughly as expected. |
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execsql { |
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SELECT count(*), sum(a), sum(b) FROM abc; |
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} |
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} [list 10000 [expr int(10000.0 * 4999.5)] [expr int(10000.0 * 4999.5)]] |
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230 |
|
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# Restore the soft heap limit. |
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sqlite3_soft_heap_limit $::soft_limit |
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233 |
|
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# Test that there are no problems calling sqlite3_release_memory when |
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# there are open in-memory databases. |
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236 |
# |
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# At one point these tests would cause a seg-fault. |
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238 |
# |
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do_test malloc5-5.1 { |
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240 |
db close |
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241 |
sqlite3 db :memory: |
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242 |
execsql { |
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243 |
BEGIN; |
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CREATE TABLE abc(a, b, c); |
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INSERT INTO abc VALUES('abcdefghi', 1234567890, NULL); |
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INSERT INTO abc SELECT * FROM abc; |
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INSERT INTO abc SELECT * FROM abc; |
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INSERT INTO abc SELECT * FROM abc; |
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INSERT INTO abc SELECT * FROM abc; |
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INSERT INTO abc SELECT * FROM abc; |
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INSERT INTO abc SELECT * FROM abc; |
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INSERT INTO abc SELECT * FROM abc; |
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253 |
} |
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254 |
sqlite3_release_memory |
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255 |
} 0 |
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do_test malloc5-5.2 { |
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257 |
sqlite3_soft_heap_limit 5000 |
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258 |
execsql { |
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COMMIT; |
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260 |
PRAGMA temp_store = memory; |
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SELECT * FROM abc ORDER BY a; |
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262 |
} |
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|
263 |
expr 1 |
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|
264 |
} {1} |
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|
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sqlite3_soft_heap_limit $::soft_limit |
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|
266 |
|
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|
267 |
#------------------------------------------------------------------------- |
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# The following test cases (malloc5-6.*) test the new global LRU list |
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269 |
# used to determine the pages to recycle when sqlite3_release_memory is |
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# called and there is more than one pager open. |
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|
271 |
# |
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272 |
proc nPage {db} { |
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set bt [btree_from_db $db] |
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|
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array set stats [btree_pager_stats $bt] |
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set stats(page) |
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|
276 |
} |
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|
277 |
db close |
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|
278 |
file delete -force test.db test.db-journal test2.db test2.db-journal |
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|
279 |
|
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# This block of test-cases (malloc5-6.1.*) prepares two database files |
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# for the subsequent tests. |
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282 |
do_test malloc5-6.1.1 { |
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283 |
sqlite3 db test.db |
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|
284 |
execsql { |
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|
285 |
PRAGMA page_size=1024; |
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|
286 |
PRAGMA default_cache_size=10; |
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287 |
} |
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|
288 |
execsql { |
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|
289 |
PRAGMA temp_store = memory; |
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|
290 |
BEGIN; |
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|
291 |
CREATE TABLE abc(a PRIMARY KEY, b, c); |
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|
292 |
INSERT INTO abc VALUES(randstr(50,50), randstr(75,75), randstr(100,100)); |
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|
293 |
INSERT INTO abc |
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|
294 |
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc; |
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|
295 |
INSERT INTO abc |
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|
296 |
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc; |
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|
297 |
INSERT INTO abc |
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|
298 |
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc; |
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|
299 |
INSERT INTO abc |
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|
300 |
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc; |
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|
301 |
INSERT INTO abc |
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|
302 |
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc; |
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|
303 |
INSERT INTO abc |
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|
304 |
SELECT randstr(50,50), randstr(75,75), randstr(100,100) FROM abc; |
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|
305 |
COMMIT; |
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|
306 |
} |
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|
307 |
copy_file test.db test2.db |
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308 |
sqlite3 db2 test2.db |
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309 |
list \ |
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[expr ([file size test.db]/1024)>20] [expr ([file size test2.db]/1024)>20] |
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} {1 1} |
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do_test malloc5-6.1.2 { |
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list [execsql {PRAGMA cache_size}] [execsql {PRAGMA cache_size} db2] |
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} {10 10} |
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315 |
|
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do_test malloc5-6.2.1 { |
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breakpoint |
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execsql {SELECT * FROM abc} db2 |
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execsql {SELECT * FROM abc} db |
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expr [nPage db] + [nPage db2] |
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} {20} |
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322 |
|
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do_test malloc5-6.2.2 { |
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# If we now try to reclaim some memory, it should come from the db2 cache. |
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325 |
sqlite3_release_memory 3000 |
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expr [nPage db] + [nPage db2] |
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} {17} |
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do_test malloc5-6.2.3 { |
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# Access the db2 cache again, so that all the db2 pages have been used |
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# more recently than all the db pages. Then try to reclaim 3000 bytes. |
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# This time, 3 pages should be pulled from the db cache. |
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execsql { SELECT * FROM abc } db2 |
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sqlite3_release_memory 3000 |
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expr [nPage db] + [nPage db2] |
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} {17} |
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336 |
|
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do_test malloc5-6.3.1 { |
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# Now open a transaction and update 2 pages in the db2 cache. Then |
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# do a SELECT on the db cache so that all the db pages are more recently |
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# used than the db2 pages. When we try to free memory, SQLite should |
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# free the non-dirty db2 pages, then the db pages, then finally use |
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# sync() to free up the dirty db2 pages. The only page that cannot be |
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# freed is page1 of db2. Because there is an open transaction, the |
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# btree layer holds a reference to page 1 in the db2 cache. |
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execsql { |
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BEGIN; |
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UPDATE abc SET c = randstr(100,100) |
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WHERE rowid = 1 OR rowid = (SELECT max(rowid) FROM abc); |
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} db2 |
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execsql { SELECT * FROM abc } db |
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expr [nPage db] + [nPage db2] |
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} {20} |
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do_test malloc5-6.3.2 { |
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# Try to release 7700 bytes. This should release all the |
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# non-dirty pages held by db2. |
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sqlite3_release_memory [expr 7*1100] |
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list [nPage db] [nPage db2] |
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} {10 3} |
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do_test malloc5-6.3.3 { |
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# Try to release another 1000 bytes. This should come fromt the db |
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# cache, since all three pages held by db2 are either in-use or diry. |
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sqlite3_release_memory 1000 |
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list [nPage db] [nPage db2] |
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} {9 3} |
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365 |
do_test malloc5-6.3.4 { |
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# Now release 9900 more (about 9 pages worth). This should expunge |
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# the rest of the db cache. But the db2 cache remains intact, because |
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# SQLite tries to avoid calling sync(). |
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sqlite3_release_memory 9900 |
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list [nPage db] [nPage db2] |
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371 |
} {0 3} |
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372 |
do_test malloc5-6.3.5 { |
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# But if we are really insistent, SQLite will consent to call sync() |
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# if there is no other option. UPDATE: As of 3.6.2, SQLite will not |
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# call sync() in this scenario. So no further memory can be reclaimed. |
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sqlite3_release_memory 1000 |
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list [nPage db] [nPage db2] |
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378 |
} {0 3} |
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do_test malloc5-6.3.6 { |
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# The referenced page (page 1 of the db2 cache) will not be freed no |
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# matter how much memory we ask for: |
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382 |
sqlite3_release_memory 31459 |
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383 |
list [nPage db] [nPage db2] |
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384 |
} {0 3} |
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385 |
|
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386 |
db2 close |
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387 |
|
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388 |
sqlite3_soft_heap_limit $::soft_limit |
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389 |
finish_test |
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390 |
catch {db close} |