# 2000 pages by default).
#
# This tests that once the pager-cache is initialised, it can be locked
# and unlocked repeatedly without internally allocating any new pages.
#
set cache_size [pager_cache_size db]
for {set ii 0} {$ii < 10} {incr ii} {

  do_test cache-1.3.$ii {
    execsql {SELECT * FROM abc}
    pager_cache_size db
  } $::cache_size

}
sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)















































































finish_test

# 2000 pages by default).
#
# This tests that once the pager-cache is initialised, it can be locked
# and unlocked repeatedly without internally allocating any new pages.
#
set cache_size [pager_cache_size db]
for {set ii 0} {$ii < 10} {incr ii} {

  do_test cache-1.3.$ii {
    execsql {SELECT * FROM abc}
    pager_cache_size db
  } $::cache_size
}

#-------------------------------------------------------------------------
# This block of tests checks that it is possible to set the cache_size of a
# database to a small (< 10) value. More specifically:
#
#   cache-2.1.*: Test that "PRAGMA cache_size" appears to work with small 
#                values.
#   cache-2.2.*: Test that "PRAGMA main.cache_size" appears to work with 
#                small values.
#   cache-2.3.*: Test cache_size=1 correctly spills/flushes the cache. 
#   cache-2.4.*: Test cache_size=0 correctly spills/flushes the cache. 
#
#
db_delete_and_reopen
do_execsql_test cache-2.0 {
  PRAGMA auto_vacuum=OFF;
  PRAGMA journal_mode=DELETE;
  CREATE TABLE t1(a, b);
  CREATE TABLE t2(c, d);
  INSERT INTO t1 VALUES('x', 'y');
  INSERT INTO t2 VALUES('i', 'j');
} {delete}

for {set i 0} {$i < 20} {incr i} {
  do_execsql_test cache-2.1.$i.1 "PRAGMA cache_size = $i"
  do_execsql_test cache-2.1.$i.2 "PRAGMA cache_size" $i
  do_execsql_test cache-2.1.$i.3 "SELECT * FROM t1" {x y}
  do_execsql_test cache-2.1.$i.4 "PRAGMA cache_size" $i
}
for {set i 0} {$i < 20} {incr i} {
  do_execsql_test cache-2.2.$i.1 "PRAGMA main.cache_size = $i"
  do_execsql_test cache-2.2.$i.2 "PRAGMA main.cache_size" $i
  do_execsql_test cache-2.2.$i.3 "SELECT * FROM t1" {x y}
  do_execsql_test cache-2.2.$i.4 "PRAGMA main.cache_size" $i
}

# Tests for cache_size = 1.
#
do_execsql_test cache-2.3.1 {
  PRAGMA cache_size = 1;
  BEGIN;
    INSERT INTO t1 VALUES(1, 2);
    PRAGMA lock_status;
} {main reserved temp closed}
do_test cache-2.3.2 { pager_cache_size db } 2
do_execsql_test cache-2.3.3 {
    INSERT INTO t2 VALUES(1, 2);
    PRAGMA lock_status;
} {main exclusive temp closed}
do_test cache-2.3.4 { pager_cache_size db } 2
do_execsql_test cache-2.3.5 COMMIT
do_test cache-2.3.6 { pager_cache_size db } 1

do_execsql_test cache-2.3.7 {
  SELECT * FROM t1 UNION SELECT * FROM t2;
} {1 2 i j x y}
do_test cache-2.3.8 { pager_cache_size db } 1

# Tests for cache_size = 0.
#
do_execsql_test cache-2.4.1 {
  PRAGMA cache_size = 0;
  BEGIN;
    INSERT INTO t1 VALUES(1, 2);
    PRAGMA lock_status;
} {main reserved temp closed}
do_test cache-2.4.2 { pager_cache_size db } 2
do_execsql_test cache-2.4.3 {
    INSERT INTO t2 VALUES(1, 2);
    PRAGMA lock_status;
} {main exclusive temp closed}
do_test cache-2.4.4 { pager_cache_size db } 2
do_execsql_test cache-2.4.5 COMMIT

do_test cache-2.4.6 { pager_cache_size db } 0
do_execsql_test cache-2.4.7 {
  SELECT * FROM t1 UNION SELECT * FROM t2;
} {1 2 i j x y}
do_test cache-2.4.8 { pager_cache_size db } 0

sqlite3_soft_heap_limit $cmdlinearg(soft-heap-limit)
finish_test