pg wait too long when osd restart

Hi all, osd_heartbeat_grace = 20 and osd_pool_default_read_lease_ratio = 0.8 by default, so, pg will wait 16s when osd restart in the worst case. This wait time is too long, client i/o can not be unacceptable. I think adjusting the osd_pool_default_read_lease_ratio to lower is a good way. Have any good suggestions about reduce pg wait time？ Best Regard Yite Gu