# SES and Spectre/Meltdown performance hit **URL:** \ **Category:** SUSE Enterprise Storage\ **Created:** [January 9, 2018, 2:49am UTC](https://forums.suse.com/t/ses-and-spectre-meltdown-performance-hit/30729 "2018-01-09T02:49:14Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![aferris](https://avatars.discourse-cdn.com/v4/letter/a/6de8d8/32.png) [@aferris](https://forums.suse.com/u/aferris)\ **Post date:** [January 9, 2018, 2:49am UTC](https://forums.suse.com/t/ses-and-spectre-meltdown-performance-hit/30729/1 "2018-01-09T02:49:14Z")
Has anyone benchmarked SES 4 or 5 to see what the mitigation from SUSE does to performance yet? Ugh and the thread title should be “and” rather than “amd”. thanks, Andrew ---
**Author:** ![Jens-U](https://avatars.discourse-cdn.com/v4/letter/j/d78d45/32.png) [@Jens-U](https://forums.suse.com/u/Jens-U)\ **Post date:** [January 12, 2018, 5:17pm UTC](https://forums.suse.com/t/ses-and-spectre-meltdown-performance-hit/30729/2 "2018-01-12T17:17:45Z")
Hi Andrew,. the ceph-users mailing list has one actual test result ([http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-January/023717.html](http://lists.ceph.com/pipermail/ceph-users-ceph.com/2018-January/023717.html)), stating [QUOTE]CPU bound test (HPL) showed a 2% hit. i/o bound test (fio) showed 30%.[/QUOTE] While those tests were likely not run on SES, but some other variant of Ceph, I believe SES cluster nodes would show similar numbers due to the low-level nature of the work-around. Regards, J ---
**Author:** ![aferris](https://avatars.discourse-cdn.com/v4/letter/a/6de8d8/32.png) [@aferris](https://forums.suse.com/u/aferris)\ **Post date:** [January 13, 2018, 12:35am UTC](https://forums.suse.com/t/ses-and-spectre-meltdown-performance-hit/30729/3 "2018-01-13T00:35:54Z")
Thanks for the reply Jens. I lurk on ceph-users too but it’s easy to miss one email. Andrew