[OSM-dev] Slow osmosis import

[merspieler]

I'm currently trying to import the planet.osm.pbf file with osmosis.
While it's quite fast with nodes (took about 7h) it massively lows down
when it comes to the ways.

INFO: Processing Node 6814667967, 307145.5708858228 objects/second.
Oct 04, 2019 9:13:37 AM
org.openstreetmap.osmosis.core.progress.v0_6.EntityProgressLogger process
INFO: Processing Node 6816253174, 296264.7470505899 objects/second.
Oct 04, 2019 9:13:43 AM
org.openstreetmap.osmosis.core.progress.v0_6.EntityProgressLogger process
INFO: Processing Way 92, 5606.095551894564 objects/second.
Oct 04, 2019 9:13:48 AM
org.openstreetmap.osmosis.core.progress.v0_6.EntityProgressLogger process
INFO: Processing Way 111, 2.3990403838464616 objects/second.
Oct 04, 2019 9:13:54 AM
org.openstreetmap.osmosis.core.progress.v0_6.EntityProgressLogger process
INFO: Processing Way 135, 2.727272727272727 objects/second.

It would take years to import it at this speed.

I run it like this:
osmosis --read-pbf file=path/to/planet.osm.pbf --log-progress
--write-pgsql database=osm_world password="not your business"

$JAVACMD_OPTIONS -Djava.io.tmpdir is set to use the same RAID as the
.pbf file and database. I've added as well -Xmx40G to see if it has
something to do with the ram but that didn't change anything.

osmosis never gets to the limits of the raid so i think i can rule out
IO performance as well.

how do i get osmosis up to speed so it will finish in a matter of days?