问题
In R Studio using R, when trying to join 2 tables which have about 100k records(DB2 DB), getting below error and none of the google solutions worked.
Error 'in .jcall(x, "S", "getMessage")': java.lang.OutOfMemoryError: GC overhead limit exceeded
回答1:
if you are using intillij On the main menu, choose File. Invalidate Caches/Restart
回答2:
I had this problem several times, sometimes randomly. What helped me so far was using the following command at the beginning of the script before loading any other package!
options(java.parameters = c("-XX:+UseConcMarkSweepGC", "-Xmx8192m"))
The -XX:+UseConcMarkSweepGC loads an alternative garbage collector which seemed to make less problems than the standard GC.
来源：https://stackoverflow.com/questions/45234844/java-lang-outofmemoryerror-gc-overhead-limit-exceeded