On Tue, Jun 2, 2020 at 6:38 AM Panu Matilainen <pmati...@redhat.com> wrote:
> On 6/2/20 2:34 PM, Richard Shaw wrote: > > On Tue, Jun 2, 2020 at 5:13 AM Panu Matilainen <pmati...@redhat.com > > <mailto:pmati...@redhat.com>> wrote: > > > > > > Well, it's a guess. > > > > Just tested the particular case of boost-devel install with plain > > rpm on > > all of sqlite, bdb and ndb, and of the three, bdb is the slowest one. > > The tested, expected behavior of sqlite is as fast or faster than > bdb, > > but of course it's *possible* previously unknown worst-case > > behaviors exist. > > > > Lets start with the basics: > > - is sqlite even involved - it will only be used on rawhide builds if > > mock bootstrap is used > > - does it make a difference if you override _db_backend to bdb/sqlite > > from mock config / cli define > > - a reproducer please (eg, what package is considerably slower to > build > > than before, and by how much) > > > > > > > > boost-devel, nosync=True, bootstrap=False > > real 0m6.083s > > user 0m4.232s > > sys 0m1.155s > > > > real 0m6.134s > > user 0m4.356s > > sys 0m1.115s > > --- > > > > boost-devel, nosync=True, bootstrap=True > > real 0m7.464s > > user 0m4.849s > > sys 0m1.364s > > > > I think this one was only slower because it converted the database? I > > saw a bunch of messages about looking for sqlite but finding bdb > database. > > > > real 0m7.234s > > user 0m4.984s > > sys 0m1.321s > > > > Nope, about the same on a second run. > > --- > > > > boost-devel, nosync=False, bootstrap=False > > real 0m7.017s > > user 0m4.388s > > sys 0m1.144s > > --- > > > > boost-devel, nosync=False, bootstrap=True > > real 1m13.294s > > user 0m6.723s > > sys 0m2.761s > > --- > > > > So it looks like boostrap=True and nosync=False is the culprit, which I > > inadvertantly got myself into. I did have either set and of course > > nosync would be False by default and it looks like bootstrap=True by > > default for rawhide. > > What's the actual command you're running here? > $ mock -r fedora-rawhide-x86_64 --init $ time mock -r fedora-rawhide-x86_64 --install boost-devel Thanks, Richard
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