On Thu, Apr 01, 2021 at 09:54:10AM -0700, Ben Pfaff wrote:
> On Thu, Apr 01, 2021 at 06:33:21PM +0200, Dumitru Ceara wrote:
> > On 4/1/21 5:48 PM, Ben Pfaff wrote:
> > > On Wed, Mar 24, 2021 at 04:03:07PM +0100, Dumitru Ceara wrote:
> > >> Hi Ben,
> > >>
> > >> We discussed a bit about this during one of the recent IRC OVN meetings,
> > >> but I didn't get around to properly reporting this until now.
> > >>
> > >> I've tried running ovn-northd-ddlog against some large OVN NB/DB
> > >> databases extracted from one of our scale testing runs:
> > >>
> > >> http://people.redhat.com/~dceara/ovn-northd-ddlog-tests/20210324/existing-nb-sb/
> > >>
> > >> It seems that ovn-northd-ddlog gets stuck in a busy loop and uses a lot
> > >> of memory:
> > >>
> > >> 775734 root      10 -10   81.6g  80.8g  22396 S  99.7  64.2   3:50.79 
> > >> ovn-northd-ddlog
> > > 
> > > I am game to try to reproduce and fix this.  I haven't tried reproducing
> > > from a database snapshot before, so it'll be a new adventure.
> > > 
> > > But those files are 403 Forbidden, even though the directory they're in
> > > comes up fine.
> > > 
> > 
> > Oops, really sorry about that, my bad.
> > 
> > Can you, please, try again now?
> 
> Thanks!  I can download them now.  It's back on my to-do list.

I can reproduce the problem now.  I haven't fixed it yet, but I did fix
a nasty performance problem in ovn-nbctl that became really apparent
when working with your databases:
https://mail.openvswitch.org/pipermail/ovs-dev/2021-April/381909.html
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