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Linode Linode KVM VPS teething issues ?

Discussion in 'Virtual Private Server (VPS) hosting' started by eva2000, Jul 29, 2015.

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  1. Jul 29, 2015 #1
    eva2000

    eva2000 Administrator Staff Member

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  2. Jul 29, 2015 #2
    rdan

    rdan Well-Known Member

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    All my 4 Linode are created fresh on KVM, not an upgrade.
    Yes I have problem, but with CSF+CentOS7.1 only.
     
  3. Jul 30, 2015 #3
    Matt

    Matt Well-Known Member

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    Mine are all fine. Again, KVM on a fresh build, and migrated to KVM straight after initial build.
     
  4. Aug 8, 2015 #4
    jeffwidman

    jeffwidman Active Member

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    I migrated a Linode that was doing several million pageviews a month with a couple of Xenforo installs from Xen to KVM and saw an instant performance increase of ~25% as reported by htop and NewRelic. Unlike most forum servers, the box was CPU-bound, not memory bound.

    I know most synthetic benchmarks don't show such a wide disparity, so my hunch is Xen is normally fine, it's just when CPU contention is really tight that Xen starts to struggle compared to KVM.

    Likely Linode's KVM boxes are running faster processors than their Xen boxes, and that would have helped as well.
     
  5. Aug 8, 2015 #5
    eva2000

    eva2000 Administrator Staff Member

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    @jeffwidman interesting indeed. Definitely much better on KVM for my Piwik Analytics Linode KVM VPS. This forum is still on Xen Linode VPS. I should find the time to switch after the .08 stable dust settles :)
     
  6. Aug 8, 2015 #6
    jeffwidman

    jeffwidman Active Member

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    The server I switched kept slowing down because too many visitor requests were stacking up. I tried bumping php workers, and just hit more contention issues, so had to bring them back down. Finally in desperation I did the one-click migrate on Linode's control panel. If I'd realized they also offer one-click upgrade to a bigger box, I probably would have done that instead, but the switch to KVM went flawlessly with only 20 mins of downtime while they copied the filesystem over.
     
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