> a sqlite book says:'The PENDING_BYTE macro (0x40000000, the first byte past the 1 GB boundary defines the beginning of the lock bytes) is the default byte used for setting PENDING locks.' * i'm not sure about is the 0x40000000 offset from the beginning of the database file ? if it is ,when the database file size less than 0x40000000(aka 1GB),where is region for the pending_byte in database file ?