Thanks for those suggestions.

There was no previous part of the session .  I opened r then ran the script
as seen.  In this case the

> rm(list = ls())


was superfluous - I just tend to have it at the beginning of scripts
to remove any rubbish if I have run previous stuff in the session.


It would be nice if the xlcFreeMemory()  gave the maximum available.



On Tue, Jun 11, 2013 at 11:02 PM, Anthony Damico <ajdamico@gmail.com> wrote:

> the
>
> > rm(list = ls())
>
> at the top of your snippet makes me wonder if you had loaded any packages
> (like XLConnect) that use Java in a previous part of the session?  i
> believe you must designate the ram allocation for java prior to loading any
> java-related packages, and clearing out your objects will not act as a
> reset..
>
>
> i'm also not sure if the memory report shows what's currently allocated or
> the actual maximum..  i've had success with increasing the allocation on
> windows in the past, even though the initial memory report said only
> ~120mb.  be sure to execute the xlcFreeMemory() command after any big
> runs-- it's the java-equivalent of gc()
>
>
> also you should be able to use
> options( java.parameters = "-Xmx4g" )
> unless you love multiplying by 1024  :)
>
>
>
>
>
> On Tue, Jun 11, 2013 at 3:21 AM, nevil amos <nevil.amos@gmail.com> wrote:
>
>> I am using some r scripts to reformat a large data set that needs to be
>> saved into xls format.
>>
>> I am getting   the  “Out of Memory Error (Java)” despite having set a
>> large
>> memory in the first line of the script ( on opening R and before loading
>> any libraries)
>>
>> I am using R version 2.15.2 (2012-10-26) -- "Trick or Treat"
>> Platform: x86_64-w64-mingw32/x64 (64-bit)
>>
>> On 64 Bit window 7 machine with 12G of ram.
>>
>> When I run the script to increase memory for jvm it is not increasing the
>> memory but remaining at 244MB ( presumably the remainder of the initial
>> 256mb once JVM is loaded...
>>
>> the script and out put is as follows
>>
>> > rm(list = ls())
>> > options(java.parameters = "-Xmx4096m",stringsAsFactors=F)
>> > library(XLConnect)
>> Loading required package: XLConnectJars
>> Loading required package: rJava
>> XLConnect 0.2-3 by Mirai Solutions GmbH
>> http://www.mirai-solutions.com ,
>> http://miraisolutions.wordpress.com
>> > print(xlcMemoryReport())
>> Amount of free memory in the Java Virtual Machine (JVM):  244.0936 MB
>>
>>
>> How do I increase the memory?
>>
>> thanks
>>
>>         [[alternative HTML version deleted]]
>>
>>
>> ______________________________________________
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>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>

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