Re: Faster way of upgrading postgresql to 10 from 9.5 - Mailing list pgsql-admin

Yes Mark I tried it like below (pg_upgrade with -k) - For 490 GB it took about 17 mins in a single node postgres . Is it possible to reduce this? *sudo -H -u postgres /usr/lib/postgresql/10/bin/pg_upgrade \* * -b /usr/lib/postgresql/9.5/bin \* * -B /usr/lib/postgresql/10/bin \* * -d /var/lib/postgresql/data/postgresql0 \* * -D /var/lib/postgresql/10/data/postgresql0 \* * -o ' -c config_file=/etc/postgresql/9.5/main/postgresql.conf' \* * -O ' -c config_file=/etc/postgresql/10/main/postgresql.conf' -k * On Sat, Nov 25, 2017 at 10:54 AM, Mark Kirkwood < mark.kirkwood@catalyst.net.nz> wrote: > I'd recommend looking at pg_upgrade again, but using the --link (-k) > option to avoid copying the data. Should be quite a bit faster. > > regards > > Mark > > > On 25/11/17 18:17, Debraj Manna wrote: > >> Ok. >> >> Is there any other approach by which I can do the migration without >> doubling the disk space? >> >> I can bear small downtime. >> >> Sent from GMail on Android >> >> On Nov 25, 2017 10:40 AM, "Alvaro Aguayo Garcia-Rada" < >> aaguayo@opensysperu.com > wrote: >> >> Yes, but only during the migration. After fi ishing and checking >> your data, you can stop & destroy the old instance >> >> Of course, this is only needed if you want a zero or little >> downtime migration, specially on production environment. >> >> >> Regards, >> >> Alvaro Aguayo >> Jefe de Operaciones >> Open Comb Systems E.I.R.L. >> >> Oficina: (+51-1 ) 3377813 | RPM: #034252 >> / (+51) 995540103 | RPC: (+51) 954183248 >> >> Website: www.ocs.pe >> >> Sent from my Sony Xperia™ smartphone >> >> ---- Debraj Manna wrote ---- >> >> >> I am using one node postgres. >> >> So if I am setting up pglogical then I guess disk space will >> double up? >> >> Sent from GMail on Android >> >> On Nov 25, 2017 9:34 AM, "Alvaro Aguayo Garcia-Rada" >> > wrote: >> >> You can do an (almost) zero downtime migration between any >> postgres version starting with 9.2 using pglogical. >> >> Basically, you first set up your new instance as a full >> replica of the old one. Then, you change whatever >> configuration your app has, changing the connection parameters >> so they point to the new instance, reboot your app(s) if >> needed, and that's all. As pglogical does not blocks changes >> on slaves, your app will run normally even with pglogical >> installed and active, letting you a time frame where you can >> have some connections still pointing to your old instance, >> with changes made on such connections being reflected on your >> new instance(warning: the opposite way will not happen. >> >> Regards, >> >> Alvaro Aguayo >> Jefe de Operaciones >> Open Comb Systems E.I.R.L. >> >> Oficina: (+51-1 ) 3377813 | RPM: >> #034252 / (+51) 995540103 | RPC: (+51) >> 954183248 >> Website: www.ocs.pe >> >> Sent from my Sony Xperia™ smartphone >> >> ---- Debraj Manna wrote ---- >> >> >> Cross posting from stack-exchange >> > f-upgrading-postgres-to-10-from-9-5> >> >> >> /I am trying to test the migration of postgres to 10 from 9.5/ >> / >> / >> /On trying in a test DB of size 490 GB in one postgres node it >> is taking about 18 mins. The command I used/ >> / >> / >> /sudo -H -u postgres /usr/lib/postgresql/10/bin/pg_upgrade \/ >> / -b /usr/lib/postgresql/9.5/bin \/ >> / -B /usr/lib/postgresql/10/bin \/ >> / -d /var/lib/postgresql/data/postgresql0 \/ >> / -D /var/lib/postgresql/10/data/postgresql0 \/ >> / -o ' -c config_file=/etc/postgresql/9.5/main/postgresql.conf' >> \/ >> / -O ' -c config_file=/etc/postgresql/10/main/postgresql.conf' >> -k / >> / >> / >> /Is there any faster way of doing this?/ >> >> >> >