The symptom being exhibited by Michael's new BF animal tanager is perfectly reproducible elsewhere.
$ cat /home/postgres/tmp/temp_config #default_toast_compression = lz4 wal_compression = lz4 $ export TEMP_CONFIG=/home/postgres/tmp/temp_config $ cd ~/pgsql/src/test/recovery $ make check PROVE_TESTS=t/011_crash_recovery.pl ... +++ tap check in src/test/recovery +++ t/011_crash_recovery.pl .. 1/? # Failed test 'new xid after restart is greater' # at t/011_crash_recovery.pl line 53. # '729' # > # '729' # Failed test 'xid is aborted after crash' # at t/011_crash_recovery.pl line 57. # got: 'committed' # expected: 'aborted' # Looks like you failed 2 tests of 3. Maybe this is somehow the test script's fault, but I don't see how. It fails the same way with 'wal_compression = pglz', so I think it's generic to that whole feature rather than specific to LZ4. regards, tom lane