Hi all

im not sure if this is absolutely the correct forum to raise this and if not would be also happy to get input on where to persue this issue.

i recently dived into using orgmode, ESS, Babel etc to run code and im really love it. The problem i have (and im not sure if its a org,Emacs or ess issue) is that emacs sometimes (and mostly when dealing with R processes involving HUGE databases) will just hang/freeze.

I do alot of modeling work that involves using huge datasets and run process intensive R processes (such as complex mixed models, Gamms etc). in R studio all works well yet when i use the orgmode eval on R code blocks it works well for small simple process but 90% of the time when dealing with complex models and bug data (up to 256GB) it will just freeze emacs/ess. sometimes i can C-c or C-g it and other times i need to physically kill emacs.

here is an example of such process that hangs

**** lmer

run the lmer part regressing stage 2 pred Vs mean pm

#+BEGIN_SRC R :session Rorg :results none

m2.smooth = lme(pred.m2 ~ meanPM25,random = list(aodid= ~1 + meanPM25),control=lmeControl(opt = "optim"), data= mod2 )

#correlate to see everything from mod2 and the mpm works

mod2[, pred.t31 := predict(m2.smooth)]

mod2[, resid := residuals(m2.smooth)]

print(summary(lm(pred.m2~pred.t31,data=mod2))$r.squared)

#+END_SRC

i usually issue org-babel-execute-subtree to eval several subsections under a main header.

again i dont know if its an org mode isse perse but would love to hear from people that have experience using R/org with big data/RAM and maybe point me to where to raise these issues

best