pg_dump/pg_restore --jobs practical limit? - Mailing list pgsql-general

From Ron
Subject pg_dump/pg_restore --jobs practical limit?
Date
Msg-id cabaebac-ae7b-493a-a127-aee941f5f335@gmail.com
Whole thread Raw
Responses Re: pg_dump/pg_restore --jobs practical limit?
List pgsql-general
I will "soon" migrate some 1+ TB database from Pg 9.6.24 on RHEL 6 VMs to Pg 
14.latest on RHEL 8 VMs.  The VMs have 10Gbps "NICs", SAN-based LUNs managed 
by LVM, and are all on ESX blades.  nproc count on some is 16 and on others 
is 32.

Does anyone have experience as to the point of diminishing returns?

IOW, can I crank them processes up to --jobs=30, will I see no gain -- or 
even degradation -- after, for example, --jobs=24?

This would be for both pg_dump and pg_restore (which would be run on the 
RHEL 8 VM).

-- 
Born in Arizona, moved to Babylonia.



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