def get_job_metrics(job):
    """
    Return a properly formatted job metrics string.
    The format of the job metrics string is defined by the server. It will be reported to the server during updateJob.

    Example of job metrics:
    Number of events read | Number of events written | vmPeak maximum | vmPeak average | RSS average | ..
    Format: nEvents=<int> nEventsW=<int> vmPeakMax=<int> vmPeakMean=<int> RSSMean=<int> hs06=<float> shutdownTime=<int>
            cpuFactor=<float> cpuLimit=<float> diskLimit=<float> jobStart=<int> memLimit=<int> runLimit=<float>

    :param job: job object.
    :return: job metrics (string).
    """
    return ''
