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Berkeley DB: DB_ENV->memp_set_max_write
DB_ENV->memp_set_max_write
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#include <db.h>
int
DB_ENV->memp_set_max_write(DB_ENV *env, int maxwrite, int maxwrite_sleep);
int
DB_ENV->memp_get_max_write(DB_ENV *env, int *maxwritep, int *maxwrite_sleepp);
Description: DB_ENV->memp_set_max_write
The DB_ENV->memp_set_max_write method limits the number of sequential write
operations scheduled by the library when flushing dirty pages from the
cache.
The DB_ENV->memp_set_max_write method
returns a non-zero error value on failure
and 0 on success.
Parameters
- maxwrite
- The maximum number of sequential write operations scheduled by the
library when flushing dirty pages from the cache.
- maxwrite_sleep
- The number of microseconds the thread of control should pause before
scheduling further write operations.
Errors
The DB_ENV->memp_set_max_write method
may fail and return one of the following non-zero errors:
- EINVAL
- An
invalid flag value or parameter was specified.
Description: DB_ENV->memp_get_max_write
The DB_ENV->memp_get_max_write method returns the current maximum number of
sequential write operations and microseconds to pause.
The DB_ENV->memp_get_max_write method may be called at any time during the life of the
application.
The DB_ENV->memp_get_max_write method
returns a non-zero error value on failure
and 0 on success.
Parameters
- maxwritep
- The maxwritep parameter references memory into which
the maximum number of sequential write operations is copied.
- maxwrite_sleepp
- The maxwrite_sleepp parameter references memory into which
the microseconds to pause before scheduling further write operations is copied.
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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