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Berkeley DB: DB_ENV->memp_trickle
DB_ENV->memp_trickle
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#include <db.h>
int
DB_ENV->memp_trickle(DB_ENV *env, int percent, int *nwrotep);
Description: DB_ENV->memp_trickle
The DB_ENV->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 DB_ENV->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 DB_ENV->memp_trickle method
returns a non-zero error value on failure
and 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 DB_ENV->memp_trickle method
may fail and return one of the following non-zero errors:
- EINVAL
- An
invalid flag value or parameter was specified.
Class
DB_ENV, DB_MPOOLFILE
See Also
Memory Pools and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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