Import SQLite 3.10.2.

third_party/sqlite/src/test/memdb.test

 # 2001 September 15
 #
 # 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.
 #
 #***********************************************************************
@@ skipping 401 matching lines @@
     db close
     sqlite3 db test.db
     db cache size 0
     execsql {
       PRAGMA auto_vacuum = full;
       CREATE TABLE t1(a);
       INSERT INTO t1 VALUES(randstr(1000,1000));
       INSERT INTO t1 VALUES(randstr(1000,1000));
       INSERT INTO t1 VALUES(randstr(1000,1000));
     }
-    set memused [lindex [sqlite3_status SQLITE_STATUS_MEMORY_USED 0] 1]
-    set pgovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 1]
+    set before [db one {PRAGMA page_count}]
     execsql { DELETE FROM t1 }
-    set memused2 [lindex [sqlite3_status SQLITE_STATUS_MEMORY_USED 0] 1]
-    expr {($memused2 + 2048 < $memused) || $pgovfl==0}
+    set after [db one {PRAGMA page_count}]
+    expr {$before>$after}
   } {1}
 }
 
 } ;# ifcapable memorydb
 
 finish_test