Show actual parallelism in an easily accessible place

[allipatev]

Customer ran EXPORT_PATH and noticed it consumes a lot of network bandwidth with default auto parallelism settings.

In general one can try to follow Export Parallelism Parameter. However, it will be great to know the real parallelism settings calculated by the DB, to use it as a starting point.

Currently this information could only be pulled from remote logs or SQL logs. Both aren't documented / supposed to be read by users.

Please consider making the real calculated parallelism for IMPORT_PATH and EXPORT_PATH available in any public location (say, in a system table).

[ckunki]

See also DOC-2424

[redcatbear]

Feature is not on the roadmap. Closing.