RMAN slow on exit

Question

I have my backup destination as an NFS mount. My environment currnetly is linux to linux, red hat. I hvae 10.2.0.3.
The performance seems real bad, backup seems to take a really long time. The worst is, even when I just do
RMAN> list recoverable backup;
It takes a really long time.
The worst is, even if I exit rman, it takes a really long time to get to the command prompt.
Is there something in the way I'm doing a nfs mount?
mount -t nfs -o rw,bg,intr,hard,timeo=600,wsize=32768,rsize=32768,nfsvers=3,tcp back.testy.com:/data/back_test /home/oracle/backup_mount
Edited the subject since it turned out to be a bug in RMAN and this problem had nothing to do with NFS

Answer 1

I guess there are a couple of bugs on this issue.
Bug 5047758 - RMAN SLOW PERFORMANCE ON EXIT (UPDATING STATUS STATISTICS)
  Version affected : 10.1
  Version fixed    : 10.2 due to base Bug 3325292 OPTIMIZER NOT ABLE TO USE INDEXES IN QUERY USING V$SQL_PLAN
  Diagnosis        : Expensive statement =
                     select round(sum(MBYTES_PROCESSED)) ,round(sum(INPUT_BYTES)),
                            round(sum(OUTPUT_BYTES)) 
                     from V$RMAN_STATUS 
                     start with (RECID=:b1 and STAMP=:b2) 
                     connect by prior RECID=parent_recid
   Workaround      : RMAN>sql "alter session set optimizer_mode=RULE";
   Remark          : It might be that Bug 5247609 is a followup / new occurence of this bug
Bug 5247609 RMAN SLOW PERFORMANCE DURING REGISTER DATABASE/OPEN RESETLOGS
  Version affected : 10.2
  Version fixed    : 10.4
  Diagnosis        : Expensive statement =
                     select round(sum(MBYTES_PROCESSED)) ,round(sum(INPUT_BYTES)),
                            round(sum(OUTPUT_BYTES)) 
                     from V$RMAN_STATUS 
                     start with (RECID=:b1 and STAMP=:b2) 
                     connect by prior RECID=parent_recid
  Workaround      : RMAN>sql "alter session set optimizer_mode=RULE";So I did the same
run
sql "alter session set optimizer_mode=RULE";
BACKUP ARCHIVELOG ALL TAG = '${TAG_TO_USE}' FORMAT = '${FILE_LOCATION}/${FILE_NAME}' DELETE INPUT;
}Got the prompt back in a few minutes as soon as the backup was done.