Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: Op. sys. refuses to provide memory - a cautionary tale


From   Tony <tchiang783@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Op. sys. refuses to provide memory - a cautionary tale
Date   Tue, 9 Mar 2010 10:37:55 -0800

I have 16GB memory with 64-bit Windows 7 and this is not a problem.
It must be the outdated setup.

Tony


On Tue, Mar 9, 2010 at 4:16 AM, Craig, Benjamin M.
<Benjamin.Craig@moffitt.org> wrote:
> This posting is based on my recent experience with STATA MP 11 and may
> be useful to those who wish to have more memory.
>
> My modest six-month-old Dell PC has 4 GB RAM. Under Stata 9.2, I was
> able to set memory to 935MB (see below), but when I installed Stata 11,
> the memory was reduced by 50% (470MB). Adjusting the boot.ini or closing
> programs had no effect, so I contacted the Stata help desk via email and
> received the prompt and effective response (below).
>
> The end of the story is that after a day of tinkering I was able to
> increase Stata MP 11 memory to 725MB by installing Windows Service Pack
> 3. And, I intend to buy a 64-bit machine, once budget allows.
>
> I attribute this issue to Windows, not Stata; however, I hope that this
> posting clarifies the issue for other Stata users, particularly those
> purchasing a new machine or considering an upgrade to Stata 11.
>
> Cheers,
> Ben
>
> Under State 9.2
> . qui for X in numlist 100(5)1000: capture set mem Xm . query mem
>
> Current memory allocation
>
>                    current                                 memory usage
>    settable          value     description                 (1M = 1024k)
>    --------------------------------------------------------------------
>    set maxvar         5000     max. variables allowed           1.733M
>    set memory          935M    max. data space                935.000M
>    set matsize         400     max. RHS vars in models          1.254M
>                                                            -----------
>                                                               937.987M
>
> Under Stata MP 11
> . qui for X in numlist 100(5)1000: capture set mem Xm . query mem
>
> Current memory allocation
>
>                    current                                 memory usage
>    settable          value     description                 (1M = 1024k)
>    --------------------------------------------------------------------
>    set maxvar         5000     max. variables allowed           1.909M
>    set memory          470M    max. data space                470.000M
>    set matsize         400     max. RHS vars in models          1.254M
>                                                            -----------
>                                                               473.163M
>
> Under Stata MP 11 after installing Windows service pack 3
> . qui for X in numlist 100(5)1000: capture set mem Xm . query mem
>
> Current memory allocation
>
>                    current                                 memory usage
>    settable          value     description                 (1M = 1024k)
>    --------------------------------------------------------------------
>    set maxvar         5000     max. variables allowed           1.909M
>    set memory          725M    max. data space                725.000M
>    set matsize        6900     max. RHS vars in models        363.815M
>                                                            -----------
>                                                             1,090.724M
>
> -----Original Message-----
> From: Stata Technical Support [mailto:tech-support@stata.com]
> Sent: Monday, March 08, 2010 3:00 PM
> To: Craig, Benjamin M.
> Subject: Re: Op. sys. Refuses to provide memory
>
> Dear Ben,
>
> What is your Windows XP service pack?  The problem you are describing
> sounds like the memory issues that Windows XP Service pack 2 had until
> Microsoft fixed it with the release of Service pack 3.  It is important
> to remember that all memory management is handled by the operating
> system.  Thus, when you try to increase the amount of RAM reserved for
> Stata, it is the operating system that tells you it can't give you any
> more memory.
>
> Now besides the Windows XP Service pack 2 memory management issues, all
> 32-bit operating systems have trouble allocating large blocks of RAM to
> any single application.  And since Stata requires a contiguous block of
> RAM, meaning that the block of RAM must have contiguous adressing, this
> issue becomes even more problematical.  A 32-bit operating system can
> only theoretically allocate 2 GBs of RAM addressing to any one
> application.  However, in practicality, the actual amount of continuous
> RAM addressing that can be allocated to any one given application is
> around 1 GB of RAM for a 32-bit Windows XP operating system.
>
> **It is important to know that this upper allocation limit does not
> increase by simply adding more RAM to the system because we are talking
> about a contiguous block of RAM, and not just total available RAM.
>
> As for Stata 9 having a larger block of RAM allocation that Stata 11
> does, this is due to Stata 9's smaller footprint.  Since Stata 11 uses
> more RAM just to be up and running, this translates into less of the
> contiguous block of RAM that is leftover for loading datasets.
>
> There are two options for increasing the amount of contiguous RAM that
> can be allocated to Stata:
>
>        1)  Go into the Windows Task manager and shutdown as many
> unnecessary programs as you can in an attempt to free up more system
> resources.
>
>        2)  Load Stata 11 onto a 64-bit operating system, which won't
> have the same memory restrictions that a 32-bit operating system has.
>
>
>
> This transmission may be confidential or protected from disclosure and is only for review and use by the intended recipient. Access by anyone else is unauthorized. Any unauthorized reader is hereby notified that any review, use, dissemination, disclosure or copying of this information, or any act or omission taken in reliance on it, is prohibited and may be unlawful. If you received this transmission in error, please notify the sender immediately. Thank you.
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index