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Berkeley DB: DbEnv::memp_trickle
DbEnv::memp_trickle
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#include <db_cxx.h>
int
DbEnv::memp_trickle(int percent, int *nwrotep);
Description: DbEnv::memp_trickle
The DbEnv::memp_trickle method ensures that a specified percent of the pages
in the shared memory pool are clean, by writing dirty pages to their
backing files.
The purpose of the DbEnv::memp_trickle function is to enable a memory
pool manager to ensure that a page is always available for reading in new
information without having to wait for a write.
The DbEnv::memp_trickle method
either returns a non-zero error value
or throws an exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
Parameters
- nwrotep
- The nwrotep parameter references memory into which
the number of pages written to reach the specified
percentage is copied.
- percent
- The percent parameter is the percent of the pages in the cache
that should be clean.
Errors
The DbEnv::memp_trickle method
may fail and throw
DbException,
encapsulating one of the following non-zero errors, or return one of
the following non-zero errors:
- EINVAL
- An
invalid flag value or parameter was specified.
Class
DbEnv, DbMpoolFile
See Also
Memory Pools and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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