Re: [ceph-users] jemalloc / Bluestore

2018-07-05 Thread Uwe Sauter
Ah, thanks… I'm currently trying to diagnose a performace regression that occurs with the Ubuntu 4.15 kernel (on a Proxmox system) and thought that jemalloc, given the old reports, could help with that. But than I ran into that bug report. I'll take from your info that I'm gonna stick to tcmal

Re: [ceph-users] jemalloc / Bluestore

2018-07-05 Thread Mark Nelson
Hi Uwe, As luck would have it we were just looking at memory allocators again and ran some quick RBD and RGW tests that stress memory allocation: https://drive.google.com/uc?export=download&id=1VlWvEDSzaG7fE4tnYfxYtzeJ8mwx4DFg The gist of it is that tcmalloc looks like it's doing pretty we

Re: [ceph-users] jemalloc / Bluestore

2018-07-05 Thread Igor Fedotov
Hi Uwe, AFAIK jemalloc isn't recommended for use with BlueStore anymore. tcmalloc is the right way so far. Thanks, Igor On 7/5/2018 4:08 PM, Uwe Sauter wrote: Hi all, is using jemalloc still recommended for Ceph? There are multiple sites (e.g. https://ceph.com/geen-categorie/the-ceph-an

[ceph-users] jemalloc / Bluestore

2018-07-05 Thread Uwe Sauter
Hi all, is using jemalloc still recommended for Ceph? There are multiple sites (e.g. https://ceph.com/geen-categorie/the-ceph-and-tcmalloc-performance-story/) from 2015 where jemalloc is praised for higher performance but I found a bug report that Bluestore crashes when used with jemalloc. Re