[ceph-users] Increase timeout for marking osd down

Dear Ceph users, my cluster is made of very old machines on a Gbit ethernet. I see that sometimes some OSDs are marked down due to slow networking, especially on heavy network load like during recovery. This causes problems, for example PGs keeps being deactivated and activated as the OSDs are marked down and up (at least to my best understanding). So I'd need to know if there is some way to increase the timeout after which an OSD is marked down, to cope with my slow network. Thanks, Nicola