postgreSQL pgfincore introduces(三)
bit
------------------+---------+--------------+--------------+-----------+-----------+---------------+---------
base/12699/16441 | 0 | 4096 | 88496 | 88496 | 1 | 186227 |
(1 row)
限制：
*PgFincore needs mincore() and POSIX_FADVISE.
*PgFincore has a limited mode when POSIX_FADVISE is not provided by the platform.
*PgFincore needs PostgreSQL >= 8.3