> In short the question is whether the row_cache_size_in_mb can exceed the heap > setting for cassandra 1.1.4 if jna.jar is present in the libs? Yes. AFAIK jna.jar is not required for off heap row cache in 1.1.X
> My heap settings are 8G and new heap size is 1600M. You can reduce the size of the heap in 1.1X. The default settings max out of 4G. Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 4/10/2012, at 3:21 PM, Ananth Gundabattula <agundabatt...@gmail.com> wrote: > Hello, > > I have configured cassandra 1.1.4 to use row cache of 10GB ( the RAM on the > machine is pretty big and hence the row cache size is high). My heap > settings are 8G and new heap size is 1600M. > > As I read from the forum and documentation, jna.jar allows to use non-heap > memory for the row caches. > > The question I have is how is the configuration in cassandra.yaml for > row_cache_size_in_mb interpreted? Is it referring to the non-heap setting or > the memory used inside the heap to maintain book-keeping information about > the non-heap memory ( as I gather from the postings that heap is indeed used > to some extent while still using the non-heap memory for row caches). > > In short the question is whether the row_cache_size_in_mb can exceed the heap > setting for cassandra 1.1.4 if jna.jar is present in the libs? > > Thanks for your time. > > Regards, > Ananth
