Describe the issue: Document `osd_memory_target_autotune` option Describe the task you were trying to accomplish: Please document the option `osd_memory_target_autotune` in osd_memory_target section. Suggestions for improvement: Please check the following PR: https://github.com/ceph/ceph/pull/41463/commits/0f1b31b298d43568505ff8e16f742ede39108f11 The main catch here is the behavior is changing from RHCS 4.x. In RHCS 4.x `osd_memory_target` used to have a static value configured at the time of deployment/installation of the cluster or changed manually. Now in RHCS 5 `osd_memory_target` value will have default starting 4G and will be changed dynamically if `osd_memory_target_autotune` is true. From PR: - set osd_memory_target_autotune=true to enable - tuning is periodic (check every 10m by default) - tuned values are reflected by osd_memory_target config options scoped to the host - only make a change if it appears that we will affect at least 1 of the relevant OSDs Document URL: https://access.redhat.com/documentation/en-us/red_hat_ceph_storage/5/html-single/configuration_guide/index#osd-memory-target_conf Product Version: RHCS 5