On 05/26/15 10:06, Jan Schermer wrote: > Turbo Boost will not hurt performance. Unless you have 100% load on > all cores it will actually improve performance (vastly, in terms of > bursty workloads). > The issue you have could be related to CPU cores going to sleep mode. Another possibility is that the system is overheating when Turbo Boost is enabled. In this case it protects itself by throttling back the core frequencies to a very low value (it may use other means too, like lowering the system buses frequencies, halting the cores periodically, ...). This would explain the high loads. If the system switches back and forth between normal loads and huge loads and you can link that to CPU package temperature (and/or very low CPU core frequencies), this is probably the cause. If the ambient temperature isn't a problem (below 25?C any system should be fine and most can tolerate 30?C or more) then you have an internal cooling problem. Best regards, Lionel -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.ceph.com/pipermail/ceph-users-ceph.com/attachments/20150526/0eea0a54/attachment.htm>
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