Known RMAN Performance Problems - Metalink Note : 247611.1

This morning, I have come across of a recently revised Metalink Note : 247611.1 (revised on 27-02.2007) which addressed several known performance problems with RMAN backup and recovery.

The note has workaround for the following bugs:

Bug 5219484 - CATALOG RESYNCS ARE VERY SLOW - ROUT TABLE HAS 6 MILLION ROWS +
Bug 5047758 - RMAN SLOW PERFORMANCE ON EXIT (UPDATING STATUS STATISTICS)
Bug 5247609 RMAN SLOW PERFORMANCE DURING REGISTER DATABASE/OPEN RESETLOGS
Bug 1551773 RMAN RESTORE RUNS VERY SLOWLY WHEN THERE ARE MANY ROWS IN THE CKP TABLE
Bug 2803823 RESYNC CATALOG AND MAINTENANCE COMMANDS ARE SLOW
Bug 4013855 - RMAN CROSSCHECK IS TAKING A LONG TIME TO COMPLETE
Note 339964.1 RMAN 8.1.7 Crosscheck Command Is Very Slow
Bug 4548861 RMAN RESTORE ARCHIVELOG UNTIL SEQUENCE TAKES A LONG TIME TO COMPLETE
Note 342999.1 First Resync on Production Host After Running RMAN on
Bug 2876717 RMAN backup starts SLOW if READ-ONLY device is used
Bug 1887868 RMAN RESYNC takes a long time with many tablespaces
Internal Bug 1712720 RMAN MAINTENANCE COMMANDS ARE VERY SLOW
Bug 2174697 RMAN incremental backup performance degrades over time in NOCATALOG mode
Bug 2385857 RMAN backup performance degrades over time for large DB_FILES
Bug 2484250 RMAN CUMULATIVE BACKUP / MAINTENENCE may appear to hang (spin)
Bug 2610596 Huge CPU usage from RMAN server when TAPE not mounted with BACKUP_TAPE_IO_SLAVE=TRUE
Bug 2968394 RESYNC TAKES A LONG TIME TO COMPLETE : LARGE BP TABLE
Bug 1407413 NO INDEX TO ON RI CONSTRAINT BETWEEN BS AND BDF
Bug 4110489 RMAN SKIP READ ONLY TABLESPACE CLAUSE TAKING TOO MUCH TIME TO SKIP
Bug 3966722 CONCURRENT RMAN BACKUPS WAIT ON TM ENQUEUE ON CKP TABLE
Bug 2710321 X$KCCFN / V$DATAFILE much slower in 9i than 8i with many datafiles


Happy reading,

Jaffar