On Wed, Feb 1, 2012 at 7:54 AM, Jim Schutt <jaschut@xxxxxxxxxx> wrote: > Hi, > > FWIW, I've been trying to understand op delays under very heavy write > load, and have been working a little with the policy throttler in hopes of > using throttling delays to help track down which ops were backing up. > Without much success, unfortunately. > > When I saw the wip-osd-op-tracking branch, I wondered if any of this > stuff might be helpful. Here it is, just in case. In general these patches are dumping information to the logs, and part of the wip-osd-op-tracking branch is actually keeping track of most of the message queueing wait times as part of the message itself (although not the information about number of waiters and sleep/wake seqs). I'm inclined to prefer that approach to log dumping. Are there any patches you recommend for merging? I'm a little curious about the ordered wakeup one — do you have data about when that's a problem? -Greg -- 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
