Re: Does WD driver support MaxMultSect=16, and is it safe for a mysql server?
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- Subject: Re: Does WD driver support MaxMultSect=16, and is it safe for a mysql server?
- From: Matus UHLAR - fantomas <firstname.lastname@example.org>
- Date: Sun, 1 Oct 2006 15:44:02 +0200
- Message-id: <[🔎] 20061001134401.GC30354@fantomas.sk>
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- References: <email@example.com> <20060929092908.GE29310@fantomas.sk> <firstname.lastname@example.org>
> >afaik multsect is only suported when DMA is not in use. DMA speeds up
> >transfers much mode, so you should focus on it.
On 30.09.06 20:15, linuzboy wrote:
> But I found the message below in mysql manual >> optimization >> Disk Issues
> On Linux, you can get much more performance by using hdparm to
> configure your disk's interface. (Up to 100% under load is not
> uncommon.) The following hdparm options should be quite good for
> MySQL, and probably for many other applications:
don't play with DMA if your kernel doesn't support it. if it does, it
probably turned DMA on.
> I know DMA is excellent, and multsect is also very impressive.
when I was solving this issue, it was told to me that multsect and 32bit I/O
do not matter if DMA is used.
> see http://linuxgazette.net/issue79/punk.html
it tells nothing about this issue...
Matus UHLAR - fantomas, email@example.com ; http://www.fantomas.sk/
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