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Berkeley DB: db_env_set_pageyield
db_env_set_pageyield
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#include <db.h>
int
db_env_set_pageyield(int pageyield);
Description
Yield the processor whenever requesting a page from the cache. Setting
pageyield to a non-zero value causes Berkeley DB to yield the processor
any time a thread requests a page from the cache. This functionality
should never be used for any other purpose than stress testing.
The db_env_set_pageyield interface affects the entire application, not a single
database or database environment.
The db_env_set_pageyield interface may be used to configure Berkeley DB at any time
during the life of the application.
The db_env_set_pageyield function returns a non-zero error value on failure and 0 on success.
Errors
The db_env_set_pageyield function may fail and return a non-zero error for the following conditions:
- EINVAL
- An invalid flag value or parameter was specified.
The db_env_set_pageyield function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the db_env_set_pageyield function may fail and return
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.
See Also
db_env_create,
DB_ENV->close,
DB_ENV->err, DB_ENV->errx
DB_ENV->open,
DB_ENV->remove,
DB_ENV->set_alloc,
DB_ENV->set_cachesize,
DB_ENV->set_data_dir,
DB_ENV->set_errcall,
DB_ENV->set_errfile,
DB_ENV->set_errpfx,
DB_ENV->set_feedback,
DB_ENV->set_flags,
DB_ENV->set_mutexlocks,
db_env_set_pageyield,
DB_ENV->set_paniccall,
db_env_set_panicstate,
DB_ENV->set_recovery_init,
DB_ENV->set_rpc_server,
db_env_set_region_init,
DB_ENV->set_shm_key,
db_env_set_tas_spins,
DB_ENV->set_tmp_dir,
DB_ENV->set_verbose,
db_strerror
and
db_version.
Copyright Sleepycat Software
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