That is very interesting Chris. As it should not be on 1024/4096 at all. The limit was not set back in libvirt 2.5 and before, so older versions had a higher limit - that much is true. I checked and it has Artful: Max open files 8192 8192 files Pre-Artful: Max open files 1048576 1048576 files
But both limits are way above yours. Your case has ~4 files per guest, but with the right limit that should be enough to close to 2k guests. I'd suggest two things: 1. I'll discuss upstream to raise the 8192 to 16384 as it seems Openstack (as a common setup) has 4 files per guest. I'll do that and link the Mailing List entry here 2. We need to find why you have a limit applied even lower than what the service file configures. @Chris - can you have a look on that system why that could be so low - any extra limits applied somewhere? Does the virlogd service file have the 8192 by default - if it has 1024/4096 what changed it? If it has 8192, can you see on the system where the 1024/4096 might come from? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1720887 Title: Default settings for virtlogd results in "too many open files" errors To manage notifications about this bug go to: https://bugs.launchpad.net/charm-nova-compute/+bug/1720887/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs