Last modified: 2013-09-11 22:45:35 UTC
My vagrant instance ran very slowly, 50 seconds to view any page. The vagrant box info in Oracle VM VirtualBox Manager (4.2.10_ubuntu) looks OK, but when I click Settings, it warns Non-optimal settings detected. ... you have assigned more than one virtual CPU to this VM. This will not work unless the IO-APIC feature is also enabled. This will be done... [when you press OK]. One problem is VBox Manager actually doesn't change this setting if vagrant is running, it can't change it until you run `vagrant halt`. After halting vagrant, VBox Manager > Settings does update it, and thereafter Vagrant runs about 9x faster! Ori asked me to report a bug, mentioning that the Vagrantfile sets vb.customize ['modifyvm', :id, '--cpus', '2'] My Vagrant instance is months old, maybe this IO-APIC conflict doesn't occur any more. If it does, perhaps this line should be commented out and users should be recommended in installation instructions to review settings in VirtualBox Manager. I added a section https://www.mediawiki.org/wiki/MediaWiki-Vagrant/Troubleshooting#If_vagrant_is_slow
Mine was re-created much more recently (maybe a week or so ago). I haven't really noticed performance problems, but then again, I have nothing much to compare to. When I opened VirtualBox, it showed 2 processors, but warned me that I had to check IO-APIC for that to take effect. It seems IO-APIC should be automatically enabled by MediaWiki-Vagrant, or it should use 1 processor (it doesn't seem like it really uses 2 otherwise).
Change 74061 had a related patch set uploaded by Ori.livneh: Enable I/O APIC https://gerrit.wikimedia.org/r/74061
It actually is supposed to use IO-APIC regardless of the guest processor count, because it is 64-bit. That's what the latest changeset does. See http://www.virtualbox.org/manual/ch03.html#intro-64bitguests See also https://bugs.launchpad.net/ubuntu/+bug/1201983 , an Ubuntu bug about the same thing.
Change 74061 merged by jenkins-bot: Enable I/O APIC https://gerrit.wikimedia.org/r/74061
[mass-moving from Tools>MediaWiki-Vagrant to separate product. See bug 54041. Filter bugmail on this comment.]
