We've been trying to reproduce the allocator performance impact on 4K random reads seen in the Hackathon (and more recent tests). At this point though, we're not seeing any significant difference between tcmalloc and jemalloc so we're looking for thoughts on what we're doing wrong. Or at least some suggestions to try out. More detail here: https://drive.google.com/file/d/0B2kp18maR7axTmU5WG9WclNKQlU/view?usp=sharing Thanks for any input! --MC -- 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