I have always thought the official ceph radosgw build links with tcmalloc. Your early response confirmed that and our older servers (running v15) also confirmed that. However, today, I actually download radosgw Debian packages (17.2.7, 17.2.6 and 17.2.5) from download.ceph.com. Unpack them and then find radosgw isn’t linked with tcmalloc. ldd radosgw shows no trace of it. I even checked 15.1.0 and 15.2.9. None of them have radosgw linked with tcmalloc. Am I getting the packages from the wrong source?