# DbEnv::set_pageyield

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    #include <db_cxx.h>

    static int
    DbEnv::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 DbEnv::set_pageyield interface affects the entire application, not a single database or database environment.

The DbEnv::set_pageyield interface may be used to configure Berkeley DB at any time during the life of the application.

The DbEnv::set_pageyield 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.

# Errors

The DbEnv::set_pageyield method may fail and throw an exception or return a non-zero error for the following conditions:

EINVAL
  An invalid flag value or parameter was specified.

The DbEnv::set_pageyield method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv::set_pageyield method may fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

# Class

DbEnv

# See Also

DbEnv::close, DbEnv::err, DbEnv::errx DbEnv::open, DbEnv::remove, DbEnv::set_alloc, DbEnv::set_cachesize, DbEnv::set_data_dir, DbEnv::set_errcall, DbEnv::set_errfile, DbEnv::set_error_stream, DbEnv::set_errpfx, DbEnv::set_feedback, DbEnv::set_flags, DbEnv::set_mutexlocks, DbEnv::set_pageyield, DbEnv::set_paniccall, DbEnv::set_panicstate, DbEnv::set_recovery_init, DbEnv::set_rpc_server, DbEnv::set_region_init, DbEnv::set_shm_key, DbEnv::set_tas_spins, DbEnv::set_tmp_dir, DbEnv::set_verbose, DbEnv::strerror and DbEnv::version.`

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