Re: Memory on koschei-backend01.phx2
On Wed, 16 Nov 2016 16:47:21 +0100 Mikolaj Izdebski wrote: > On 11/16/2016 04:17 PM, Kevin Fenzi wrote: ...snip... > > Shall I decrease it back to 4GB? (That may need a reboot). > > Not needed right now. I'll be reinstalling it as Fedora 25 after GA. ok. > When reinstalling I would like to add more swap (4 GB instead of 2 GB; > that would require a custom kickstart, IIUC) and set max_mem_size to 4 > GB. Any reason not to do this? I guess not. Perhaps we could just change the default f25 kickstart to do that. I don't see a big problem using a few more GB of disk space on them all and then we don't have to keep yet another custom one. kevin pgpqhUq5gZHQS.pgp Description: OpenPGP digital signature ___ infrastructure mailing list -- infrastructure@lists.fedoraproject.org To unsubscribe send an email to infrastructure-le...@lists.fedoraproject.org
Re: Memory on koschei-backend01.phx2
On 11/16/2016 04:17 PM, Kevin Fenzi wrote: > On Wed, 16 Nov 2016 14:17:46 +0100 > Mikolaj Izdebski wrote: > >> Michael Simacek pointed out that koschei-backend01.phx2 has 20 GB of >> physical memory, while Ansible inventory vars specify only 4 GB. >> >> Does anyone know where this difference comes from? Did anyone increase >> VM settings without committing them to Ansible git repo? If so, what >> was the reason? > > It might have been me... bumping the memory up to see if it helped it > with memory usage. ;( But usually when I make those changes, I also > make them in ansible, and I don't recall making this one, so perhaps it > was someone else. ;( That won't help much with swap usage by itself. We are limiting RSS for systemd services, any virtual memory beyond limit (currently 3 GB) is swapped to disk. So it ends up with swap usage above 80 %, but mostly free physical memory - below 25 %. > Anyhow, the way we setup hosts in ansible they have the memory they are > set for in vars, and also we set max_memory to 5* that value. ie, this > host was set for 4GB memory, so max was 20GB and it was dynamically > increased to that. Right, now I remember seeing this. > Shall I decrease it back to 4GB? (That may need a reboot). Not needed right now. I'll be reinstalling it as Fedora 25 after GA. When reinstalling I would like to add more swap (4 GB instead of 2 GB; that would require a custom kickstart, IIUC) and set max_mem_size to 4 GB. Any reason not to do this? Thanks, -- Mikolaj Izdebski Software Engineer, Red Hat IRC: mizdebsk ___ infrastructure mailing list -- infrastructure@lists.fedoraproject.org To unsubscribe send an email to infrastructure-le...@lists.fedoraproject.org
Re: Memory on koschei-backend01.phx2
On Wed, 16 Nov 2016 14:17:46 +0100 Mikolaj Izdebski wrote: > Michael Simacek pointed out that koschei-backend01.phx2 has 20 GB of > physical memory, while Ansible inventory vars specify only 4 GB. > > Does anyone know where this difference comes from? Did anyone increase > VM settings without committing them to Ansible git repo? If so, what > was the reason? It might have been me... bumping the memory up to see if it helped it with memory usage. ;( But usually when I make those changes, I also make them in ansible, and I don't recall making this one, so perhaps it was someone else. ;( Anyhow, the way we setup hosts in ansible they have the memory they are set for in vars, and also we set max_memory to 5* that value. ie, this host was set for 4GB memory, so max was 20GB and it was dynamically increased to that. Shall I decrease it back to 4GB? (That may need a reboot). kevin pgpUUoUOiVVOh.pgp Description: OpenPGP digital signature ___ infrastructure mailing list -- infrastructure@lists.fedoraproject.org To unsubscribe send an email to infrastructure-le...@lists.fedoraproject.org
Re: Memory on koschei-backend01.phx2
I would expect it is trying to deal with a large number of OOM's on the service On 16 November 2016 at 08:17, Mikolaj Izdebski wrote: > Michael Simacek pointed out that koschei-backend01.phx2 has 20 GB of > physical memory, while Ansible inventory vars specify only 4 GB. > > Does anyone know where this difference comes from? Did anyone increase > VM settings without committing them to Ansible git repo? If so, what was > the reason? > > -- > Mikolaj Izdebski > Software Engineer, Red Hat > IRC: mizdebsk > ___ > infrastructure mailing list -- infrastructure@lists.fedoraproject.org > To unsubscribe send an email to infrastructure-le...@lists.fedoraproject.org -- Stephen J Smoogen. ___ infrastructure mailing list -- infrastructure@lists.fedoraproject.org To unsubscribe send an email to infrastructure-le...@lists.fedoraproject.org
