Hi, Those traces happens only constant high constant writes and seems to be very rarely. OSD processes do not consume more memory after this event and peaks are not distinguishable by monitoring. I have able to catch it having four-hour constant writes on the cluster. http://xdel.ru/downloads/ceph-log/allocation-failure/ -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html