Hello Sebastian,
I wonder have you solved the problem? I am facing pretty much the same issue
but the post on https://redmine.postgresql.org/issues/2097 could not help me
at all.
I am using pgAdmin 4.21 to backup(actully my boss asked me to "copy", but I
can't download the snapshot :( ) and try to restore a database from AWS
RDS(postgres12) to the other ubuntu server(postgres13). Successful backup,
however, facing the upload limit 50mb when restoring. I saw there is some
adjustment could be made in phpPgAdmin configuration. But pgAdmin doesn't
work that way. I've also tried command line suggested in stack
<https://stackoverflow.com/questions/1237725/copying-postgresql-database-to-another-server>
, even I adjusted the "Security Group" still no working.
So now I started it over again digging every possible solution.
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