Out of curiosity, did you intentionally leave out the other hours in the day?
I am asking because my account has four jobs and they are all either on hour 11 or hour 12 of the day (either daily or weekly), but I didn't see any numbers for hour 11 in your email. On Wed, Mar 20, 2019 at 8:46 PM Giovanni Tirloni <gtirl...@wikimedia.org> wrote: > Hello, > > While trying to troubleshoot performance issues on our NFS server, it > became apparent that we have a peak of requests durings hours 0-3 every > day. This is currently hard to properly manage and results in slower > performance for everybody. > > Here's a breakdown of the number of cronjobs scheduled to start in the > new SGE cluster, per hour: > > 473 * # hourly > 213 0 > 106 1 > 82 2 > 78 3 > 54 9 > 50 4 > 48 7 > 45 12 > 42 5 > > You can see that, apart from hourly jobs, we have most cronjobs > starting in hours 1-3. > > My advice is that, if your workload permits, *schedule your cronjobs > outside of that time window so you are not competing for resources with > everybody else*. The more spread throughout the day your cronjobs are, > the better. > > Also beware of step values like "*/2" which will make your cronjob run > on hours 0 and 2 too. > > If you have any questions, please find us on #wikimedia-cloud > > Regards, > > -- > Giovanni Tirloni > Operations Engineer > Wikimedia Foundation > > _______________________________________________ > Wikimedia Cloud Services mailing list > Cloud@lists.wikimedia.org (formerly lab...@lists.wikimedia.org) > https://lists.wikimedia.org/mailman/listinfo/cloud
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