Re: Solaris 10 and Oracle 10g - swap space problem
- From: Riyaj Shamsudeen <riyaj.shamsudeen@xxxxxxxxx>
- To: David.J.Miller@xxxxxxx
- Date: Mon, 3 Aug 2009 13:27:58 -0500
Hi David
In a nutshell, what you are saying is that I am interpreting swap -s
inaccurately. I think, that makes sense. I just read man pages for swap and
at the end of -s section, following lines are printed.
" These numbers include swap space from all configured
swap areas as listed by the -l option, as well swap
space *in the form of physical memory*."
So, the drop in swap -s I see is simply the drop in physical memory for
ISM. DISM doesn't matter since we know that swap is reserved. Am I
understanding this accurately?
Thanks for the clarification. And Tanel, your blog entry is still valid
:-)
Cheers
Riyaj Shamsudeen
Principal DBA,
Ora!nternals - http://www.orainternals.com
Specialists in Performance, Recovery and EBS11i
Blog: http://orainternals.wordpress.com
On Mon, Aug 3, 2009 at 9:21 AM, David Miller <David.J.Miller@xxxxxxx> wrote:
Hi Riyaj,
I think the issue here is with understanding what the data from "swap -s"
means.
>
> Here's from one of my internal systems:
>
> # swap -l
> swapfile dev swaplo blocks free
> /dev/dsk/c0t1d0s1 32,9 16 8201840 8201840
> /dev/md/dsk/d209 85,209 16 67108848 67108848
> /dev/md/dsk/d210 85,210 16 67108848 67108848
> /dev/md/dsk/d211 85,211 16 67108848 67108848
> /dev/md/dsk/d212 85,212 16 67108848 67108848
> /dev/md/dsk/d213 85,213 16 67108848 67108848
>
> # sys
> XXX 08/03/09 10:02:16 SunOS 5.10 Generic_139555-04 sun4u
> 2520/0 MHz 8 CPUs 32.00 GB memory SUNW,SPARC-Enterprise
>
> # swap -s
> total: 71280k bytes allocated + 12368k reserved = 83648k used, 200001416k
> available
>
> So the 200001416k is equal to the 32 * 5 + 4 GB in actual swap files plus
> 32 GB in memory minus the kernel space (and whatever is in /tmp; I didn't
> check).
>
> <...snipped..>
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