On Thu, 2020-05-07 at 13:33 -0700, Tory M Blue wrote: > I hadn't noticed this until today, but a running 9.5 system with > buffers at 10GB starts and has been running years without issues. > (15GB available) > Postgres 12 will not start with that configuration, complaining about > memory availability. So Postgres12 won't start until shared buffers > is 6GB, but even with that, my DB servers , postgres queries started > complaining about being unable to allocate memory "unable to > allocate". > > So dropping them to 4GB (on a 15GB system), may help, but did I miss a > huge note about significant memory changes between 9.5 to 12? > > Is there something else I'm missing that on busy systems is important, > something introduced in 10 or 11 as again I'm not seeing anything > noted in 12. > Thanks
Is this running on an otherwise identical system? Or do you have a different kernel, overcommit settings, or swap configuration?
