Hi All, There was a similar problem in this discussion: Logical decoding CPU-bound w/ large number of tables https://www.postgresql.org/message-id/flat/CAHoiPjzea6N0zuCi%3D%2Bf9v_j94nfsy6y8SU7-%3Dbp4%3D7qw6_i%3DRg%40mail.gmail.com > RelfilenodeMapHash from 1024 entries to 64. The above changes reduced the performance impact. However, I think the problem that there are too many invalidations of RelfilenodeMapHash still remains. As you report, when many tables are created/dropped/truncated, The walsender process can get stuck. -- Keisuke Kuroda NTT Software Innovation Center keisuke.kuroda.3862@xxxxxxxxx
