def validate_page_size(page_size):
    """
    Validate that page size parameter is in numeric format or not

    :type page_size: str
    :param page_size: this value will be check as numeric or not

    :return: True if page size is valid  else raise ValueError
    :rtype: bool
    """
    if not page_size or not str(page_size).isdigit() or int(page_size) == 0:
        raise ValueError('Page size must be a non-zero numeric value')
    return True