On Thu, Aug 20, 2015 at 2:35 PM, Dałek, Piotr <Piotr.Dalek@xxxxxxxxxxxxxx> wrote: >> -----Original Message----- >> From: ceph-devel-owner@xxxxxxxxxxxxxxx [mailto:ceph-devel- >> owner@xxxxxxxxxxxxxxx] On Behalf Of Blinick, Stephen L >> Sent: Wednesday, August 19, 2015 6:58 PM >> >> [.. >> Regarding the all-HDD or high density HDD nodes, is it certain these issues >> with tcmalloc don't apply, due to lower performance, or would it potentially >> be something that would manifest over a longer period of time >> (weeks/months) of running? I know we've seen some weirdness attributed >> to tcmalloc on our 10-disk 20-node cluster with HDD's & SSD journals, but it >> took a few weeks. > > And it takes me just a few minutes with rados bench to reproduce this issue on mixed-storage node (SSDs, SAS disks, high-capacity SATA disks, etc). > See here: http://ceph.predictor.org.pl/cpu_usage_over_time.xlsx > It gets even worse when rebalancing starts... Cool, it met my thought. I guess the only way to lighten memory problem is solve this for each heavy memory allocation use case. > > With best regards / Pozdrawiam > Piotr Dałek -- Best Regards, Wheat -- 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
