max_allowed_packet equivalent in Postgres?

Hey folks,

I'm installing OTRS/ITSM (and yes, sending the same question to their
list) and it gives me this warning.  I cannot find an equivalent
config parameter in Postgres.

Make sure your database accepts packages over 5 MB in size. A MySQL
database for example accepts packages up to 1 MB by default. In this
case, the value for max_allowed_packet must be increased. The
recommended maximum size accepted is 20 MB.

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