R引导时是否有2GB的内存使用限制?

证明: Rprofile的内容:message("Available memory when .Rprofile is sourced: ", memory.limit()).First <- function() { message("Available memory when .First() is called: ", memory.limit())}启动时输出Available memory when .Rprofile is sourced: 2047Available memory when .First() is called: 2047R开始后 memory.limit的输出> memory.limit()[1] 16289I have the following code for loading some data in my .Rprofile (which is a R script in my project folder running automatically when I switch to the project with Rstudio).data_files <- list.files(pattern="\\.(RData|rda)$")if("data.rda" %in% data_files) { attach(what="data.rda", pos = 2) cat("The file 'data.rda' was attached to the search path under 'file:data.rda'.\n\n")}The data being loaded is relatively big: Type Size PrettySize Rows Columnsindividual_viewings_26 data.frame 1547911120 [1] "1.4 Gb" 3685312 63viewing_statements_all data.table 892316088 [1] "851 Mb" 3431935 38weights data.frame 373135464 [1] "355.8 Mb" 3331538 14pet data.table 63926168 [1] "61 Mb" 227384 34But I have 16 GB and I can allocate them:> memory.limit()[1] 16289When my data was not as big, I did not have any issue. I recently saved some more data frames in data.rda and my R session suddenly fails at start-up (when I switch to the project in Rstudio and .Rprofile is executed):Error: cannot allocate vector of size 26.2 MbIn addition: Warning messages:1: Reached total allocation of 2047Mb: see help(memory.size)2: Reached total allocation of 2047Mb: see help(memory.size)3: Reached total allocation of 2047Mb: see help(memory.size)4: Reached total allocation of 2047Mb: see help(memory.size)I suspect that for some reason, the memory limit is set at 2GB at boot? Any way I can change that?Edit: Added OS and software version> sessionInfo()R version 3.2.2 (2015-08-14)Platform: x86_64-w64-mingw32/x64 (64-bit)Running under: Windows 7 x64 (build 7601) Service Pack 1Edit2: Just to clarify, I am able to load the data myself by running the code, I have plenty of available memory and the R process commonly uses up to 10GB during my daily work. The problem is, there is a apparently a 2GB memory limit when R boots and executes the .Rprofile... 解决方案 Yes, there is a 2GB limit when R starts, at least when the user profile (.Rprofile files and .First() functions) are executed.Proof:Content of Rprofile:message("Available memory when .Rprofile is sourced: ", memory.limit()).First <- function() { message("Available memory when .First() is called: ", memory.limit())}Output at startupAvailable memory when .Rprofile is sourced: 2047Available memory when .First() is called: 2047Output of memory.limit once R has started> memory.limit()[1] 16289 这篇关于R引导时是否有2GB的内存使用限制?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！