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Re: st: How to deal with r(909) "op. sys. refuses to provide memory"??? xtgls


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How to deal with r(909) "op. sys. refuses to provide memory"??? xtgls
Date   Sun, 9 Dec 2012 10:52:09 +0000

You have 4 Gb of RAM, but it's typical that Windows only provides
about half to Stata. You need more RAM, i.e. a hardware change, to run
precisely this model. Otherwise you try using fewer groups or shutting
other applications (which probably won't make much difference).

Nick

On Sun, Dec 9, 2012 at 10:28 AM, Murod Aliyev <ma.statalist@yahoo.com> wrote:

> I have read a lot of threads on this issue, but still can not resolve my problem:
>
> I am trying to run FGLS (xtgls) with 49,000 observations, 8 years unbalanced panel with around 7,500 groups, 26 varibles in the model.
> After first trying xtgls I get a message saying "matsize too small - should be at least 7369". So, I set matsize to 8000, then I get a message r(909) "op. sys. refuses to provide memory". Could you please help me understand what is causing the problem here, and how to reslve it? I presume it is not related to the number of observations or variables, but rather caused by the way FGLS works.
>
> Resources in use:
>
> - 32 bit Windows 7
> - RAM 4g
> - Stata/SE 12.1
> - Stata "About" shows Available Physical Memory 1,945,452 KB
> - max_memory set to .
>
> Memory report is as follows:
>
> . memory
>  Memory usage
>                                            used                allocated
>  ---------------------------------------------------------------------
>  data (incl. buffers)              35,809,764               67,108,864
>  var. names, %fmts, ...                32,668                   52,140
>  overhead                           1,064,972                1,065,172
>  Stata matrices                             0                        0
>  ado-files                            114,691                  114,691
>  saved results                         65,115                   65,115
>  Mata matrices                         34,884                   34,884
>  Mata functions                        14,040                   14,040
>  set maxvar usage                   1,391,728                1,391,728
>  other                                  2,687                    2,687
>  ---------------------------------------------------------------------
>  total                             38,449,909               69,849,321
>

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