On Wed, Feb 11, 2015 at 2:22 AM, Pavel Velikhov <[email protected]> wrote:
> 2. While trying to update the full dataset with a simple transformation > (again via python driver), single node and clustered Cassandra run out of > memory no matter what settings I try, even I put a lot of sleeps into the > mix. However simpler transformations (updating just one column, specially > when there is a lot of processing overhead) work just fine. > What does a "simple transformation" mean here? Assuming a reasonable sized heap, OOM sounds like you're trying to update a large number of large partitions in a single operation. In general, in Cassandra, you're best off interacting with a single or small number of partitions in any given interaction. =Rob
