third_party/sqlite/src/test/memsubsys1.test - cobalt - Git at Google

 # 2008 June 18
 #
 # 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 tests of the memory allocation subsystem
 #

 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
 sqlite3_reset_auto_extension

 # This test assumes that no page-cache or scratch buffers are installed
 # by default when a new database connection is opened. As a result, it
 # will not work with the "memsubsys1" permutation.
 #
 if {[permutation] == "memsubsys1"} {
   finish_test
   return
 }

 # This procedure constructs a new database in test.db.  It fills
 # this database with many small records (enough to force multiple
 # rebalance operations in the btree-layer and to require a large
 # page cache), verifies correct results, then returns.
 #
 proc build_test_db {testname pragmas} {
   catch {db close}
   file delete -force test.db test.db-journal
   sqlite3 db test.db
   sqlite3_db_config_lookaside db 0 0 0
   db eval $pragmas
   db eval {
     CREATE TABLE t1(x, y);
     CREATE TABLE t2(a, b);
     CREATE INDEX i1 ON t1(x,y);
     INSERT INTO t1 VALUES(1, 100);
     INSERT INTO t1 VALUES(2, 200);
   }
   for {set i 2} {$i<5000} {incr i $i} {
     db eval {INSERT INTO t2 SELECT * FROM t1}
     db eval {INSERT INTO t1 SELECT a+$i, a+b*100 FROM t2}
     db eval {DELETE FROM t2}
   }
   do_test $testname.1 {
     db eval {SELECT count(*) FROM t1}
   } 8192
   integrity_check $testname.2
 }

 # Reset all of the highwater marks.
 #
 proc reset_highwater_marks {} {
   sqlite3_status SQLITE_STATUS_MEMORY_USED 1
   sqlite3_status SQLITE_STATUS_MALLOC_SIZE 1
   sqlite3_status SQLITE_STATUS_PAGECACHE_USED 1
   sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 1
   sqlite3_status SQLITE_STATUS_PAGECACHE_SIZE 1
   sqlite3_status SQLITE_STATUS_SCRATCH_USED 1
   sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 1
   sqlite3_status SQLITE_STATUS_SCRATCH_SIZE 1
   sqlite3_status SQLITE_STATUS_PARSER_STACK 1
 }

 set xtra_size 256

 # Test 1:  Both PAGECACHE and SCRATCH are shut down.
 #
 db close
 sqlite3_shutdown
 sqlite3_config_lookaside 0 0
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-1 {PRAGMA page_size=1024}
 do_test memsubsys1-1.3 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
 } 0
 do_test memsubsys1-1.4 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 0
 set max_pagecache [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
 #show_memstats

 # Test 2:  Activate PAGECACHE with 20 pages
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 1024+$xtra_size] 20
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-2 {PRAGMA page_size=1024}
 #show_memstats
 set MEMORY_MANAGEMENT $sqlite_options(memorymanage)
 do_test memsubsys1-2.3 {
   set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
 } [expr ($TEMP_STORE>1 || $MEMORY_MANAGEMENT==0)*1024]
 do_test memsubsys1-2.4 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
 } 20
 do_test memsubsys1-2.5 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 0

 # Test 3:  Activate PAGECACHE with 20 pages but use the wrong page size
 # so that PAGECACHE is not used.
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 512+$xtra_size] 20
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-3.1 {PRAGMA page_size=1024}
 #show_memstats
 do_test memsubsys1-3.1.3 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
 } 0
 do_test memsubsys1-3.1.4 {
   set overflow [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
 } $max_pagecache
 do_test memsubsys1-3.1.5 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 0
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 2048+$xtra_size] 20
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-3.2 {PRAGMA page_size=2048}
 #show_memstats
 do_test memsubsys1-3.2.3 {
   db eval {PRAGMA page_size}
 } 2048
 do_test memsubsys1-3.2.4 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
 } 20
 do_test memsubsys1-3.2.5 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 0

 # Test 4:  Activate both PAGECACHE and SCRATCH.
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 1024+$xtra_size] 50
 sqlite3_config_scratch 6000 2
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-4 {PRAGMA page_size=1024}
 #show_memstats
 do_test memsubsys1-4.3 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
   expr {$pg_used>=45 && $pg_used<=50}
 } 1
 do_test memsubsys1-4.4 {
   set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
 } 0
 do_test memsubsys1-4.5 {
   set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
   expr {$maxreq<7000}
 } 1
 do_test memsubsys1-4.6 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 1

 # Test 5:  Activate both PAGECACHE and SCRATCH.  But make the page size
 # such that the SCRATCH allocations are too small.
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 4096+$xtra_size] 24
 sqlite3_config_scratch 6000 2
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-5 {PRAGMA page_size=4096}
 #show_memstats
 do_test memsubsys1-5.3 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
 } 24
 do_test memsubsys1-5.4 {
   set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
   expr {$maxreq>4096}
 } 1
 do_test memsubsys1-5.5 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 0
 do_test memsubsys1-5.6 {
   set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
   expr {$s_ovfl>6000}
 } 1

 # Test 6:  Activate both PAGECACHE and SCRATCH with a 4k page size.
 # Make it so that SCRATCH is large enough
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 4096+$xtra_size] 24
 sqlite3_config_scratch 25300 1
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-6 {PRAGMA page_size=4096}
 #show_memstats
 do_test memsubsys1-6.3 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
 } 24
 #do_test memsubsys1-6.4 {
 #  set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
 #  expr {$maxreq>4096 && $maxreq<=(4096+$xtra_size)}
 #} 1
 do_test memsubsys1-6.5 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 1
 do_test memsubsys1-6.6 {
   set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
 } 0

 # Test 7:  Activate both PAGECACHE and SCRATCH with a 4k page size.
 # Set cache_size small so that no PAGECACHE overflow occurs.  Verify
 # that maximum allocation size is small.
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache [expr 4096+$xtra_size] 24
 sqlite3_config_scratch 25300 1
 sqlite3_initialize
 reset_highwater_marks
 build_test_db memsubsys1-7 {
   PRAGMA page_size=4096;
   PRAGMA cache_size=10;
   PRAGMA temp_store=memory;
 }
 #show_memstats
 do_test memsubsys1-7.3 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
   expr {$pg_used<24}
 } 1
 do_test memsubsys1-7.4 {
   set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
 } 0
 do_test memsubsys1-7.5 {
   set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
   expr {$maxreq<4100}
 } 1
 do_test memsubsys1-7.6 {
   set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 1
 do_test memsubsys1-7.7 {
   set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
 } 0

 # Test 8:  Disable PAGECACHE.  Make available SCRATCH zero.  Verify that
 # the SCRATCH overflow logic works.
 #
 db close
 sqlite3_shutdown
 sqlite3_config_pagecache 0 0
 sqlite3_config_scratch 25000 0
 sqlite3_initialize
 reset_highwater_marks
 do_test memsubsys1-8.1 {
   set pg_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
 } 0
 do_test memsubsys1-8.2 {
   set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
 } 0
 do_test memsubsys1-8.3 {
   sqlite3 db :memory:
   db eval {
     CREATE TABLE t1(x);
     INSERT INTO t1 VALUES(zeroblob(400));
     INSERT INTO t1 VALUES(zeroblob(400));
     INSERT INTO t1 SELECT * FROM t1;
     INSERT INTO t1 SELECT * FROM t1;
     INSERT INTO t1 SELECT * FROM t1;
   }
   expr {[lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]>0}
 } 1
 db close
 sqlite3_shutdown
 sqlite3_config_memstatus 0
 sqlite3_initialize
 do_test memsubsys1-8.4 {
   sqlite3 db :memory:
   db eval {
     CREATE TABLE t1(x);
     INSERT INTO t1 VALUES(zeroblob(400));
     INSERT INTO t1 VALUES(zeroblob(400));
     INSERT INTO t1 SELECT * FROM t1;
     INSERT INTO t1 SELECT * FROM t1;
     INSERT INTO t1 SELECT * FROM t1;
     SELECT rowid FROM t1;
   }
 } {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16}


 db close
 sqlite3_shutdown
 sqlite3_config_memstatus 1
 sqlite3_config_pagecache 0 0
 sqlite3_config_scratch 0 0
 sqlite3_config_lookaside 100 500
 sqlite3_initialize
 autoinstall_test_functions
 finish_test
	# 2008 June 18
	#
	# 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 tests of the memory allocation subsystem
	#

	set testdir [file dirname $argv0]
	source $testdir/tester.tcl
	sqlite3_reset_auto_extension

	# This test assumes that no page-cache or scratch buffers are installed
	# by default when a new database connection is opened. As a result, it
	# will not work with the "memsubsys1" permutation.
	#
	if {[permutation] == "memsubsys1"} {
	finish_test
	return
	}

	# This procedure constructs a new database in test.db. It fills
	# this database with many small records (enough to force multiple
	# rebalance operations in the btree-layer and to require a large
	# page cache), verifies correct results, then returns.
	#
	proc build_test_db {testname pragmas} {
	catch {db close}
	file delete -force test.db test.db-journal
	sqlite3 db test.db
	sqlite3_db_config_lookaside db 0 0 0
	db eval $pragmas
	db eval {
	CREATE TABLE t1(x, y);
	CREATE TABLE t2(a, b);
	CREATE INDEX i1 ON t1(x,y);
	INSERT INTO t1 VALUES(1, 100);
	INSERT INTO t1 VALUES(2, 200);
	}
	for {set i 2} {$i<5000} {incr i $i} {
	db eval {INSERT INTO t2 SELECT * FROM t1}
	db eval {INSERT INTO t1 SELECT a+$i, a+b*100 FROM t2}
	db eval {DELETE FROM t2}
	}
	do_test $testname.1 {
	db eval {SELECT count(*) FROM t1}
	} 8192
	integrity_check $testname.2
	}

	# Reset all of the highwater marks.
	#
	proc reset_highwater_marks {} {
	sqlite3_status SQLITE_STATUS_MEMORY_USED 1
	sqlite3_status SQLITE_STATUS_MALLOC_SIZE 1
	sqlite3_status SQLITE_STATUS_PAGECACHE_USED 1
	sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 1
	sqlite3_status SQLITE_STATUS_PAGECACHE_SIZE 1
	sqlite3_status SQLITE_STATUS_SCRATCH_USED 1
	sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 1
	sqlite3_status SQLITE_STATUS_SCRATCH_SIZE 1
	sqlite3_status SQLITE_STATUS_PARSER_STACK 1
	}

	set xtra_size 256

	# Test 1: Both PAGECACHE and SCRATCH are shut down.
	#
	db close
	sqlite3_shutdown
	sqlite3_config_lookaside 0 0
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-1 {PRAGMA page_size=1024}
	do_test memsubsys1-1.3 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	} 0
	do_test memsubsys1-1.4 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 0
	set max_pagecache [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
	#show_memstats

	# Test 2: Activate PAGECACHE with 20 pages
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 1024+$xtra_size] 20
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-2 {PRAGMA page_size=1024}
	#show_memstats
	set MEMORY_MANAGEMENT $sqlite_options(memorymanage)
	do_test memsubsys1-2.3 {
	set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
	} [expr ($TEMP_STORE>1 \|\| $MEMORY_MANAGEMENT==0)*1024]
	do_test memsubsys1-2.4 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	} 20
	do_test memsubsys1-2.5 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 0

	# Test 3: Activate PAGECACHE with 20 pages but use the wrong page size
	# so that PAGECACHE is not used.
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 512+$xtra_size] 20
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-3.1 {PRAGMA page_size=1024}
	#show_memstats
	do_test memsubsys1-3.1.3 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	} 0
	do_test memsubsys1-3.1.4 {
	set overflow [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
	} $max_pagecache
	do_test memsubsys1-3.1.5 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 0
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 2048+$xtra_size] 20
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-3.2 {PRAGMA page_size=2048}
	#show_memstats
	do_test memsubsys1-3.2.3 {
	db eval {PRAGMA page_size}
	} 2048
	do_test memsubsys1-3.2.4 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	} 20
	do_test memsubsys1-3.2.5 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 0

	# Test 4: Activate both PAGECACHE and SCRATCH.
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 1024+$xtra_size] 50
	sqlite3_config_scratch 6000 2
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-4 {PRAGMA page_size=1024}
	#show_memstats
	do_test memsubsys1-4.3 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	expr {$pg_used>=45 && $pg_used<=50}
	} 1
	do_test memsubsys1-4.4 {
	set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
	} 0
	do_test memsubsys1-4.5 {
	set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
	expr {$maxreq<7000}
	} 1
	do_test memsubsys1-4.6 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 1

	# Test 5: Activate both PAGECACHE and SCRATCH. But make the page size
	# such that the SCRATCH allocations are too small.
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 4096+$xtra_size] 24
	sqlite3_config_scratch 6000 2
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-5 {PRAGMA page_size=4096}
	#show_memstats
	do_test memsubsys1-5.3 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	} 24
	do_test memsubsys1-5.4 {
	set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
	expr {$maxreq>4096}
	} 1
	do_test memsubsys1-5.5 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 0
	do_test memsubsys1-5.6 {
	set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
	expr {$s_ovfl>6000}
	} 1

	# Test 6: Activate both PAGECACHE and SCRATCH with a 4k page size.
	# Make it so that SCRATCH is large enough
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 4096+$xtra_size] 24
	sqlite3_config_scratch 25300 1
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-6 {PRAGMA page_size=4096}
	#show_memstats
	do_test memsubsys1-6.3 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	} 24
	#do_test memsubsys1-6.4 {
	# set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
	# expr {$maxreq>4096 && $maxreq<=(4096+$xtra_size)}
	#} 1
	do_test memsubsys1-6.5 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 1
	do_test memsubsys1-6.6 {
	set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
	} 0

	# Test 7: Activate both PAGECACHE and SCRATCH with a 4k page size.
	# Set cache_size small so that no PAGECACHE overflow occurs. Verify
	# that maximum allocation size is small.
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache [expr 4096+$xtra_size] 24
	sqlite3_config_scratch 25300 1
	sqlite3_initialize
	reset_highwater_marks
	build_test_db memsubsys1-7 {
	PRAGMA page_size=4096;
	PRAGMA cache_size=10;
	PRAGMA temp_store=memory;
	}
	#show_memstats
	do_test memsubsys1-7.3 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_USED 0] 2]
	expr {$pg_used<24}
	} 1
	do_test memsubsys1-7.4 {
	set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
	} 0
	do_test memsubsys1-7.5 {
	set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
	expr {$maxreq<4100}
	} 1
	do_test memsubsys1-7.6 {
	set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 1
	do_test memsubsys1-7.7 {
	set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
	} 0

	# Test 8: Disable PAGECACHE. Make available SCRATCH zero. Verify that
	# the SCRATCH overflow logic works.
	#
	db close
	sqlite3_shutdown
	sqlite3_config_pagecache 0 0
	sqlite3_config_scratch 25000 0
	sqlite3_initialize
	reset_highwater_marks
	do_test memsubsys1-8.1 {
	set pg_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
	} 0
	do_test memsubsys1-8.2 {
	set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]
	} 0
	do_test memsubsys1-8.3 {
	sqlite3 db :memory:
	db eval {
	CREATE TABLE t1(x);
	INSERT INTO t1 VALUES(zeroblob(400));
	INSERT INTO t1 VALUES(zeroblob(400));
	INSERT INTO t1 SELECT * FROM t1;
	INSERT INTO t1 SELECT * FROM t1;
	INSERT INTO t1 SELECT * FROM t1;
	}
	expr {[lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]>0}
	} 1
	db close
	sqlite3_shutdown
	sqlite3_config_memstatus 0
	sqlite3_initialize
	do_test memsubsys1-8.4 {
	sqlite3 db :memory:
	db eval {
	CREATE TABLE t1(x);
	INSERT INTO t1 VALUES(zeroblob(400));
	INSERT INTO t1 VALUES(zeroblob(400));
	INSERT INTO t1 SELECT * FROM t1;
	INSERT INTO t1 SELECT * FROM t1;
	INSERT INTO t1 SELECT * FROM t1;
	SELECT rowid FROM t1;
	}
	} {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16}


	db close
	sqlite3_shutdown
	sqlite3_config_memstatus 1
	sqlite3_config_pagecache 0 0
	sqlite3_config_scratch 0 0
	sqlite3_config_lookaside 100 500
	sqlite3_initialize
	autoinstall_test_functions
	finish_test