# DB_MPOOLFILE->set_clear_len

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    #include <db.h>

    int
    DB_MPOOLFILE->set_clear_len(DB_MPOOLFILE *mpf, u_int32_t len);

# Description

The DB_MPOOLFILE->set_clear_len function sets the number of initial bytes in a page that should be set to nul when the page is created as a result of the DB_MPOOL_CREATE or DB_MPOOL_NEW flags being specified to DB_MPOOLFILE->get. If no value is specified, or len is 0, the entire page is cleared.

The DB_MPOOLFILE->set_clear_len function returns a non-zero error value on failure and 0 on success.

# Errors

The DB_MPOOLFILE->set_clear_len 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_MPOOLFILE->set_clear_len 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->set_cachesize, DB_ENV->set_mp_mmapsize, DB_ENV->memp_fcreate, DB_MPOOLFILE->close, DB_MPOOLFILE->get, DB_MPOOLFILE->open, DB_MPOOLFILE->put, DB_MPOOLFILE->set, DB_MPOOLFILE->sync, DB_ENV->memp_register, DB_MPOOLFILE->set_clear_len, DB_MPOOLFILE->set_fileid, DB_MPOOLFILE->set_ftype, DB_MPOOLFILE->set_lsn_offset, DB_MPOOLFILE->set_pgcookie, DB_ENV->memp_stat, DB_ENV->memp_sync, and DB_ENV->memp_trickle.`

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