On 12 April 2012 20:45, Sage Weil <sage@xxxxxxxxxxxx> wrote: > I'm not familiar with the performance implications of KSM, but the > objectcacher doesn't modify existing buffers in place, so I suspect it's a > good candidate. And it looks like there's minimal effort in enabling > it... It uses some CPU when calculating hashes, although I believe if it gets to be too resource consuming it is possible to disable it and continue to use the shared pages you have already calculated, just not updating or checking for any others that could be shared. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html