CPU idle usage
I recently noticed a problem with installing R / RStudio. When I open RStudio, the CPU usage in the activity monitor shows that the rsession and kernel_task processes hang by about 30% even when R is down and nothing is running. I know this is a very vague description of the problem, I hope someone here can give me directions on how to debug this problem or post more relevant information.
Thank.
> sessionInfo()
R version 2.15.2 (2012-10-26)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)
locale:
[1] en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] tools_2.15.2
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If you are working on a specific Rstudio project and that project contains many files (hundreds or thousands), Rstudio may try to index the files -
I fixed it this way:
- From the Rstudio IDE in the project,
- Go to
Tools
→Project Options
- Now click on edit code
- deselect
Index R Source Files
- close everything and restart Rstudio
edit
Index R Source Files
- determines whether R source files within the project directory will be indexed for code navigation (i.e. go to file / function, go to function definition). Usually this should remain, but if you have a project directory with thousands of files and are concerned about the overhead of monitoring and indexing them, you can turn off indexing here.Insert spaces for tab
- Determine whether a tab inserts multiple spaces rather than a tab (soft tabs). Adjust the number of spaces for the soft tab.Text encoding
- specify the default text encoding for source files. Note that source files that do not match the default encoding may still open correctly using the menuFile : Reopen with Encoding
command. Source
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