[SunHELP] Solaris 2.6 Memory Limitation
Naser Ali
sunhelp at sunhelp.org
Wed Feb 28 14:53:33 CST 2001
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Hello Josh,
Thanks for your reply. I am aware of the oracle or Sybase limitation of 4
gig. That is because bothe of these applications are 32 bit, unless they are
64 bit versions.
But on the other hand the Solaris 2.6 or earlier versions are 32 bit as
well. Therefore, theoretically/technically they should not be able to
address more than 4 gig. In your case you have 10 gig on your E10k, which
means the 6 gig of it is never used or addressed by the OS. Solaris would
only create page segments of 8k upto 4 gig at startup.
Correct me I am wrong, any one ...?
Thanks
-----Original Message-----
From: Josh McCormick [mailto:josh.mccormick at wcom.com]
Sent: Wednesday, February 28, 2001 2:34 PM
To: sunhelp at sunhelp.org
Subject: Re: [SunHELP] Solaris 2.6 Memory Limitation
I've got a number of E10k domains running 2.5.1 and 2.6. One in
particular I'm looking at has 10gb of RAM. Yes, you can have greater
than 4gb of memory and be able to access it.
I think the catch, or the distinction here, is that a process, for
example, Sybase or Oracle, cannot grab a block bigger than 4gb by
itself. However, the combination of all the processes running on your
system can go well beyond 4gb.
Actually, I've run into this, in that we wanted to increase the shared
memory pool that Sybase uses for caching. But the operating system
limits the amount that an instance of Sybase can grab to 4gb. However,
there are a number of other things that run on that system in addition
to sybase, and it consumes around 11gb of memory (with swap devices
holding the excess 1gb).
Hope this explains things.
"Fletcher, Joe" wrote:
>
> In something like an E10K you can split the >4Gb into domains and allocate
a
> chunk for each domain.
>
> -----Original Message-----
> From: Mohammed, Ahsan [mailto:ahsan.mohammed at bankofamerica.com]
> Sent: 28 February 2001 17:16
> To: sunhelp at sunhelp.org
> Subject: RE: [SunHELP] Solaris 2.6 Memory Limitation
>
> If it can address only 4GB what is the purpose of having more than 4GB?
> I mean how can the remaining be put into use?
> Thanks in Advance.
> Ahsan
>
> Ahsan Mohammed
> Database Administrator
> (214) 209 2574
> Pager: 877 677 5480
>
> -----Original Message-----
> From: Fletcher, Joe [SMTP:joe.fletcher at metapack.com]
> Sent: Wednesday, February 28, 2001 10:36 AM
> To: 'sunhelp at sunhelp.org'
> Subject: RE: [SunHELP] Solaris 2.6 Memory Limitation
>
> It's true that 32bit systems can only address a maximum of 4GB of
> memory. That's not to say that a system running a 32bit o/s
> can physically contain only 4GB RAM. Solaris 2.6 is 32bit
therefore
> it can only address up to 4GB.
>
> -----Original Message-----
> From: Naser Ali [mailto:Ali.Naser at irs.gov]
> Sent: 28 February 2001 15:23
> To: sunhelp at sunhelp.org
> Subject: [SunHELP] Solaris 2.6 Memory Limitation
>
>
>
> Hello Every one,
> Just recently some one on our project mentioned that the
> E10K we have which has 16Gig of memory running Solaris 2.6, has the
> limitation of only 4 gig on the memory. Is that true with Solaris 2.6...?
>
> TIA
>
> MetaPack
>
> The Lightwell
>
> 12/16 Laystall Street
>
> Clerkenwell
>
> London EC1R 4PF
>
> Tel: +44 (0) 20 7843 6720
>
> Fax: +44 (0) 20 7843 6721
>
>
> --------------------------------------------------------------------------
>
> This email is confidential and proprietary;
>
> all information contained in it must be used only by the addressee
> in accordance with MetaPack's terms of business and non-disclosure
> agreement.
>
> Disclosure, copying, and distribution to, or use by, anyone other
> than the intended recipient is strictly prohibited and may be unlawful.
>
> _______________________________________________
> SunHELP maillist - SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp
>
> MetaPack
> The Lightwell
> 12/16 Laystall Street
> Clerkenwell
> London EC1R 4PF
> Tel: +44 (0) 20 7843 6720
> Fax: +44 (0) 20 7843 6721
> --------------------------------------------------------------------------
> This email is confidential and proprietary;
> all information contained in it must be used only by the addressee in
> accordance with MetaPack's terms of business and non-disclosure agreement.
> Disclosure, copying, and distribution to, or use by, anyone other than the
> intended recipient is strictly prohibited and may be unlawful.
> _______________________________________________
> SunHELP maillist - SunHELP at sunhelp.org
> http://www.sunhelp.org/mailman/listinfo/sunhelp
_______________________________________________
SunHELP maillist - SunHELP at sunhelp.org
http://www.sunhelp.org/mailman/listinfo/sunhelp
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<P><FONT SIZE=3D2>Hello Josh,</FONT>
<BR><FONT SIZE=3D2>Thanks for your reply. I am aware of the oracle or =
Sybase limitation of 4 gig. That is because bothe of these applications =
are 32 bit, unless they are 64 bit versions. </FONT></P>
<P><FONT SIZE=3D2>But on the other hand the Solaris 2.6 or earlier =
versions are 32 bit as well. Therefore, theoretically/technically they =
should not be able to address more than 4 gig. In your case you have 10 =
gig on your E10k, which means the 6 gig of it is never used or =
addressed by the OS. Solaris would only create page segments of 8k upto =
4 gig at startup.</FONT></P>
<P><FONT SIZE=3D2>Correct me I am wrong, any one ...?</FONT>
<BR><FONT SIZE=3D2>Thanks</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: Josh McCormick [<A =
HREF=3D"mailto:josh.mccormick at wcom.com">mailto:josh.mccormick at wcom.com</=
A>]</FONT>
<BR><FONT SIZE=3D2>Sent: Wednesday, February 28, 2001 2:34 PM</FONT>
<BR><FONT SIZE=3D2>To: sunhelp at sunhelp.org</FONT>
<BR><FONT SIZE=3D2>Subject: Re: [SunHELP] Solaris 2.6 Memory =
Limitation</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>I've got a number of E10k domains running 2.5.1 and =
2.6. One in</FONT>
<BR><FONT SIZE=3D2>particular I'm looking at has 10gb of RAM. Yes, you =
can have greater</FONT>
<BR><FONT SIZE=3D2>than 4gb of memory and be able to access it.</FONT>
</P>
<P><FONT SIZE=3D2>I think the catch, or the distinction here, is that a =
process, for</FONT>
<BR><FONT SIZE=3D2>example, Sybase or Oracle, cannot grab a block =
bigger than 4gb by</FONT>
<BR><FONT SIZE=3D2>itself. However, the combination of all the =
processes running on your</FONT>
<BR><FONT SIZE=3D2>system can go well beyond 4gb.</FONT>
</P>
<P><FONT SIZE=3D2>Actually, I've run into this, in that we wanted to =
increase the shared</FONT>
<BR><FONT SIZE=3D2>memory pool that Sybase uses for caching. But the =
operating system</FONT>
<BR><FONT SIZE=3D2>limits the amount that an instance of Sybase can =
grab to 4gb. However,</FONT>
<BR><FONT SIZE=3D2>there are a number of other things that run on that =
system in addition</FONT>
<BR><FONT SIZE=3D2>to sybase, and it consumes around 11gb of memory =
(with swap devices</FONT>
<BR><FONT SIZE=3D2>holding the excess 1gb).</FONT>
</P>
<P><FONT SIZE=3D2>Hope this explains things.</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>"Fletcher, Joe" wrote:</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> In something like an E10K you can split the =
>4Gb into domains and allocate a</FONT>
<BR><FONT SIZE=3D2>> chunk for each domain.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> -----Original Message-----</FONT>
<BR><FONT SIZE=3D2>> From: Mohammed, Ahsan [<A =
HREF=3D"mailto:ahsan.mohammed at bankofamerica.com">mailto:ahsan.mohammed at b=
ankofamerica.com</A>]</FONT>
<BR><FONT SIZE=3D2>> Sent: 28 February 2001 17:16</FONT>
<BR><FONT SIZE=3D2>> To: sunhelp at sunhelp.org</FONT>
<BR><FONT SIZE=3D2>> Subject: RE: [SunHELP] Solaris 2.6 Memory =
Limitation</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> If it can address only 4GB what is the purpose =
of having more than 4GB?</FONT>
<BR><FONT SIZE=3D2>> I mean how can the remaining be put into =
use?</FONT>
<BR><FONT SIZE=3D2>> Thanks in Advance.</FONT>
<BR><FONT SIZE=3D2>> Ahsan</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> Ahsan Mohammed</FONT>
<BR><FONT SIZE=3D2>> Database Administrator</FONT>
<BR><FONT SIZE=3D2>> (214) 209 2574</FONT>
<BR><FONT SIZE=3D2>> Pager: 877 677 5480</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>> =
From: Fletcher, Joe [SMTP:joe.fletcher at metapack.com]</FONT>
<BR><FONT SIZE=3D2>> =
Sent: Wednesday, February 28, 2001 10:36 AM</FONT>
<BR><FONT SIZE=3D2>> =
To: 'sunhelp at sunhelp.org'</FONT>
<BR><FONT SIZE=3D2>> =
Subject: RE: [SunHELP] =
Solaris 2.6 Memory Limitation</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
It's true that 32bit systems can only address a maximum of 4GB =
of</FONT>
<BR><FONT SIZE=3D2>> memory. That's not to say that a system running =
a 32bit o/s</FONT>
<BR><FONT SIZE=3D2>> =
can physically contain only 4GB RAM. Solaris 2.6 is 32bit =
therefore</FONT>
<BR><FONT SIZE=3D2>> it can only address up to 4GB.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT =
SIZE=3D2>>  =
; -----Original Message-----</FONT>
<BR><FONT =
SIZE=3D2>>  =
; From: Naser Ali [<A =
HREF=3D"mailto:Ali.Naser at irs.gov">mailto:Ali.Naser at irs.gov</A>]</FONT>
<BR><FONT =
SIZE=3D2>>  =
; Sent: 28 February 2001 =
15:23</FONT>
<BR><FONT =
SIZE=3D2>>  =
; To: sunhelp at sunhelp.org</FONT>
<BR><FONT =
SIZE=3D2>>  =
; Subject: [SunHELP] Solaris 2.6 =
Memory Limitation</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT =
SIZE=3D2>>  =
; Hello Every one,</FONT>
<BR><FONT =
SIZE=3D2>>  =
; Just recently some one on our =
project mentioned that the</FONT>
<BR><FONT SIZE=3D2>> E10K we have which has 16Gig of memory =
running Solaris 2.6, has the</FONT>
<BR><FONT SIZE=3D2>> limitation of only 4 gig on the memory. Is that =
true with Solaris 2.6...?</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT =
SIZE=3D2>>  =
; TIA</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
MetaPack</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
The Lightwell</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
12/16 Laystall Street</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
Clerkenwell</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
London EC1R 4PF</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
Tel: +44 (0) 20 7843 6720</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
Fax: +44 (0) 20 7843 6721</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
------------------------------------------------------------------------=
--</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
This email is confidential and proprietary;</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
all information contained in it must be used only by the =
addressee</FONT>
<BR><FONT SIZE=3D2>> in accordance with MetaPack's terms of business =
and non-disclosure</FONT>
<BR><FONT SIZE=3D2>> agreement.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
Disclosure, copying, and distribution to, or use by, anyone =
other</FONT>
<BR><FONT SIZE=3D2>> than the intended recipient is strictly =
prohibited and may be unlawful.</FONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> =
_______________________________________________</FONT>
<BR><FONT SIZE=3D2>> SunHELP maillist - =
SunHELP at sunhelp.org</FONT>
<BR><FONT SIZE=3D2>> <A =
HREF=3D"http://www.sunhelp.org/mailman/listinfo/sunhelp" =
TARGET=3D"_blank">http://www.sunhelp.org/mailman/listinfo/sunhelp</A></F=
ONT>
<BR><FONT SIZE=3D2>> </FONT>
<BR><FONT SIZE=3D2>> MetaPack</FONT>
<BR><FONT SIZE=3D2>> The Lightwell</FONT>
<BR><FONT SIZE=3D2>> 12/16 Laystall Street</FONT>
<BR><FONT SIZE=3D2>> Clerkenwell</FONT>
<BR><FONT SIZE=3D2>> London EC1R 4PF</FONT>
<BR><FONT SIZE=3D2>> Tel: +44 (0) 20 7843 6720</FONT>
<BR><FONT SIZE=3D2>> Fax: +44 (0) 20 7843 6721</FONT>
<BR><FONT SIZE=3D2>> =
------------------------------------------------------------------------=
--</FONT>
<BR><FONT SIZE=3D2>> This email is confidential and =
proprietary;</FONT>
<BR><FONT SIZE=3D2>> all information contained in it must be used =
only by the addressee in</FONT>
<BR><FONT SIZE=3D2>> accordance with MetaPack's terms of business =
and non-disclosure agreement.</FONT>
<BR><FONT SIZE=3D2>> Disclosure, copying, and distribution to, or =
use by, anyone other than the</FONT>
<BR><FONT SIZE=3D2>> intended recipient is strictly prohibited and =
may be unlawful.</FONT>
<BR><FONT SIZE=3D2>> =
_______________________________________________</FONT>
<BR><FONT SIZE=3D2>> SunHELP maillist - =
SunHELP at sunhelp.org</FONT>
<BR><FONT SIZE=3D2>> <A =
HREF=3D"http://www.sunhelp.org/mailman/listinfo/sunhelp" =
TARGET=3D"_blank">http://www.sunhelp.org/mailman/listinfo/sunhelp</A></F=
ONT>
<BR><FONT =
SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>SunHELP maillist - =
SunHELP at sunhelp.org</FONT>
<BR><FONT SIZE=3D2><A =
HREF=3D"http://www.sunhelp.org/mailman/listinfo/sunhelp" =
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