Recently Mark Nelson added the concept of a memory target to the OSD - it attempts to keep RSS within a certain size by autotuning the BlueStore cache size, and also adjusts how the cache works internally to perform better. Join us this Friday, Nov. 30, at 7am PST to go through the code behind this: https://bluejeans.com/908675367 As usual this will be recorded and posted on youtube later. Feel free to suggest a future topic here: http://tracker.ceph.com/projects/ceph/wiki/Code_Walkthroughs Josh