|
[oracle-l]
||
[Date Prev]
[08-2006 Date Index]
[Date Next]
||
[Thread Prev]
[08-2006 Thread Index]
[Thread Next]
rman compressed backup is much smaller but very slow
- From: Tomi Wijanto <restomi_w@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Wed, 2 Aug 2006 01:37:37 -0700 (PDT)
Dear expert,
i tried compressed backup in 10g RMAN and very curious
about its performance.
OS: AIX 5.3 ML04
CPU: 12 with dual core
MEMORY: 60GB
Datafiles were raw partition, backup directory were
mounted with Concurrent IO.
If i ran the backup of 1 datafile without compression
to disk, it took 45 seconds with backup size 5.17 GB.
If i ran the same backup with compression, it took 290
seconds with backup size 838 MB.
So it's about 6 times slower.
Some presentation i read (one from Mr. Antognini) show
that the overhead of compression is small, only about
15%.
Could someone shared their experieces on compressed
backup, especially with big sized database.
regards,
tomi
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
--
http://www.freelists.org/webpage/oracle-l
|
|
