Michael Wildpaner <mike(at)rainbow(dot)studorg(dot)tuwien(dot)ac(dot)at> writes:
> two concurrent clients try to 'COPY ... FROM ...' to the same table,
> "feature_link".
> The second one (pid 17983) is waiting for an ExclusiveLock on the table's
> primary key index, "key__idpk__flink".
You didn't show a stack trace for this one ...
regards, tom lane