[Bug 1578080] Re: percona cluster hits resource limits in HA Openstack cloud with xenial
Bug Watch Updater
1578080 at bugs.launchpad.net
Sat May 7 03:07:15 UTC 2016
** Changed in: systemd (Debian)
Status: Unknown => Confirmed
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
percona cluster hits resource limits in HA Openstack cloud with xenial
Status in percona-xtradb-cluster-5.6 package in Ubuntu:
Status in systemd package in Ubuntu:
Status in systemd source package in Xenial:
Status in percona-cluster package in Juju Charms Collection:
Status in systemd package in Debian:
I'm trying to deploy Mitaka Openstack using the 16.04 charms on Xenial
using Juju 1.25.5 and MAAS 1.9.2, with as many components of Openstack
being HA as possible.
When deployed, after running for a while mysql (which is a 3 node
cluster) starts refusing connections, and erroring:
2016-05-03 01:25:28 13795 [ERROR] Error log throttle: 50
'Can't create thread to handle new connection' error(s) suppressed
When I look at systemd-cgtop, I can see it maxing out at 512
To get it going again I do a:
$ sudo systemctl edit mysql
Sometimes I even need to edit /etc/systemd/system.conf and bump
DefaultTasksMax to 1024 or higher, depending on long its been left
I've noticed that dropping worker-multiplier setting on nova-cloud-
controller, neutron-api etc all help to reduce the load, but I still
need to bump it up.
Please let me know if you need any more information.
To manage notifications about this bug go to:
More information about the foundations-bugs