RE: 10G and UFS - long write times
- From: "Kevin Closson" <kevinc@xxxxxxxxxxxxx>
- To: "oracle-l" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 8 Jun 2006 11:09:59 -0700
>>>One more option worth trying with ufs is using -r option (setting the
rpm speed of the disk). By default solaris sets the disk rpm speed to
3200, so if you have a 10000 rpm drive it will still rotate at 3600 rpm.
On the downside you need to recreate the filesystem to add this option
...hold it. I sped-read this one. Um, you're referring to the archane
newfs -r option.
That does not make the disk spin at a certain speed. Disk rotation it an
agreement
between the HW, firmware and sometimes the driver. Newfs has nothing to
do with that.
That old newfs option had to do with Sun's attempts to limit buffer
overruns on
really old slow hardware that had poor track buffering. A complete red
herring
on today's hardware.
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