Sergei Golubchik added a comment - 2022-05-20 20:00 this should be implemented in My::Debugger and work for all debuggers and all tools ($MYSQL, etc)

Marko Mäkelä added a comment - 2022-06-15 06:52 There is one additional consideration for 10.8 and later releases. Quoting a comment in MDEV-14425 : An observation was made during testing: rr record mariadb-backup --backup cannot work reliably if the redo log file was opened via mmap() . The reason is that rr assumes that the mmap file contents may only be changed by the traced process(es) . To avoid bogus failures while running backup under rr , there are a few solutions: Build without libpmem : rm CMakeCache.txt; cmake -DCMAKE_DISABLE_FIND_PACKAGE_PMEM=1 /path/to/source Place the server’s redo log somewhere else than /dev/shm or a PMEM device mounted with -o dax . Patch log_t::attach() so that mmap() will not be attempted if srv_operation == SRV_OPERATION_BACKUP . Implement server-side backup ( MDEV-14992 ). One more (probably impractical) alternative would be to trace both the server and the backup process in a single rr record process.