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Berkeley DB: DbMpoolFile
DbMpoolFile
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#include <db_cxx.h>
class DbMpoolFile { ... };
Description
This manual page describes the specific details of the DbMpoolFile
class.
The DbEnv memory pool methods and the DbMpoolFile class
are the library interface that provide general-purpose, page-oriented
buffer management of one or more files. Although designed to work with
the other Db classes, they are also useful for more general
purposes. The memory pools are referred to in this document as simply
pools.
Pools may be shared between processes. Pools are usually filled by pages
from one or more files. Pages in the pool are replaced in LRU
(least-recently-used) order, with each new page replacing the page that
has been unused the longest. Pages retrieved from the pool using
DbMpoolFile::get are pinned in the pool until they are
returned to the control of the buffer pool using the DbMpoolFile::put
method.
Class
DbEnv, DbMpoolFile
See Also
DbEnv::set_cachesize,
DbEnv::set_mp_mmapsize,
DbMpoolFile::close,
DbMpoolFile::get,
DbMpoolFile::open,
DbMpoolFile::put,
DbMpoolFile::set,
DbMpoolFile::sync,
DbEnv::memp_register,
DbEnv::memp_stat,
DbEnv::memp_sync,
and
DbEnv::memp_trickle.
Copyright Sleepycat Software
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