ion will ever span the entire buffer, and avoid a state where
                 the in-memory buffer is full and no space can be freed because a
                 transaction that started in the first log "file" is still active.
            </p>
                <p>
                Calling <code class="methodname">DbEnv::log_set_config()</code> with the
                <code class="literal">DB_LOG_IN_MEMORY</code> flag
                 affects the database environment, including all threads of control
        