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Home -> Community -> Mailing Lists -> Oracle-L -> Re: RMAN Performance Maladies
an SLA that says you need a full backup? That's not an SLA/requirement it is a technical implementation specification.?
SLA should read, full recovery of all committed data within x minutes right?
Whoever wrote the SLA should rethink it. 10.2 also has incremental merges so you still have a "full backup on disk", despite not having taken a full backup everyday.
but the SLA author may be against that. Did the SLA mandate the RMAN script as well? :)
seriously though. you can limit the read/write rate for RMAN, that wouldn't help your cause. RMAN also tracks the disk read/write rates in some of its views. It has been awhlie now that I looked at that stuff, but it was there.. reports on how much throughput you got for each piece it backed up.
RAID 5 a "compromise" between efficiency and performance? That sounds like the "compromise" the native americans made with the settlers.
Job
Dennis Williams <oracledba.williams_at_gmail.com> wrote:
Michael,
Backing up to RAID 5? Well expect that to be a little sluggish. Also, RMAN doesn't just blast the files to disk, it is doing more complicated stuff. Meaning more writes, which again RAID-5 does slowly.
Dennis Williams
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