[ceph-users] Memory footprint of increased PG number

Dear Ceph user, I'm wondering how much an increase of PG number would impact on the memory occupancy of OSD daemons. In my cluster I currently have 512 PGs and I would like to increase it to 1024 to mitigate some disk occupancy issues, but having machines with low amount of memory (down to 24 GB for 16 OSDs) I fear this could kill my cluster. Is it possible to evaluate the relative increase in OSD memory footprint when doubling the number of PGs (hopefully not a linear scaling)? Or is there a way to experiment without crashing everything? Thank you.