[Rd] Hard memory limit of 16GB under Windows?

[Tomas Kalibera]

Hi Samuel,

please also have a look at ?memory.limit. You can set this limit at R 
startup. It is in megabytes. Maybe R Studio sets it at runtime.

Best
Tomas

On 4/7/20 3:57 PM, Samuel Granjeaud IR/Inserm wrote:
> Hi Tomas,
>
> Many thanks for your answer.
>
> Here is a copy of a fresh session under RStudio, and after a copy 
> under Rgui.
> Strangely enough the result of memory.limit() is not the same. Without 
> your question I would not have looked to RGui, being used to work with 
> RStudio.
>
> The value under RGui sounds to correspond to the total RAM of the 
> computer. It makes me noticing that the value is in MB.
>
> The value under Rstudio was so huge (1.759219e+13) that I just 
> interpreted it as GB. But I was totally wrong. So in fact I don't know 
> what it refers to. The documentation says "For a 64-bit versions of R 
> under 64-bit Windows the limit is currently 8Tb.", but it looks like 
> being 16TB, which my computer don't have of course.
>
> I still have to understand why my colleague has a problem of memory 
> allocation (cannot allocate vector of size 12.6 Gb).
>
> Sorry for the wrong interpretation, but thanks for the help,
> Samuel
>
> --- RStudio
>
> R version 3.6.3 (2020-02-29) -- "Holding the Windsock"
> Copyright (C) 2020 The R Foundation for Statistical Computing
> Platform: x86_64-w64-mingw32/x64 (64-bit)
>
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
>
> R is a collaborative project with many contributors.
> Type 'contributors()' for more information and
> 'citation()' on how to cite R or R packages in publications.
>
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
>
> > memory.limit()
> [1] 1.759219e+13
> > sessionInfo()
> R version 3.6.3 (2020-02-29)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
> Running under: Windows 10 x64 (build 18363)
>
> Matrix products: default
>
> locale:
> [1] LC_COLLATE=French_France.1252  LC_CTYPE=French_France.1252 
> LC_MONETARY=French_France.1252 LC_NUMERIC=C
> [5] LC_TIME=French_France.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods base
>
> loaded via a namespace (and not attached):
> [1] compiler_3.6.3 tools_3.6.3
> >
>
> --- RGui
>
> R version 3.6.3 (2020-02-29) -- "Holding the Windsock"
> Copyright (C) 2020 The R Foundation for Statistical Computing
> Platform: x86_64-w64-mingw32/x64 (64-bit)
>
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type 'license()' or 'licence()' for distribution details.
>
> R is a collaborative project with many contributors.
> Type 'contributors()' for more information and
> 'citation()' on how to cite R or R packages in publications.
>
> Type 'demo()' for some demos, 'help()' for on-line help, or
> 'help.start()' for an HTML browser interface to help.
> Type 'q()' to quit R.
>
> > ls()
> character(0)
> > memory.limit()
> [1] 32627
> > sessionInfo()
> R version 3.6.3 (2020-02-29)
> Platform: x86_64-w64-mingw32/x64 (64-bit)
> Running under: Windows 10 x64 (build 18363)
>
> Matrix products: default
>
> locale:
> [1] LC_COLLATE=French_France.1252  LC_CTYPE=French_France.1252 
> LC_MONETARY=French_France.1252
> [4] LC_NUMERIC=C                   LC_TIME=French_France.1252
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods base
>
> loaded via a namespace (and not attached):
> [1] compiler_3.6.3
> >
>