On Tue, Apr 19, 2016 at 9:51 AM, Jack Krupansky <jack.krupan...@gmail.com> wrote:
> > 1. Another clarification: All of the aggregate functions, AVG, SUM, MIN, > MAX are in exactly the same boat as COUNT, right? > Yes. > > 2. Is the paging for COUNT, et al, done within the coordinator node? > Yes. > > 3. Does dedupe on the coordinator node consume memory proportional to the > number of rows on all nodes? I mean, you can't dedupe using only partition > keys of the coordinator node, right? What I'm wondering is if the usability > of COUNT (et al) is memory limited as well as time. > Deduping (i.e. normal conflict resolution) happens per-page, so in the worst case the memory requirements for the coordinator are RF * page size. -- Tyler Hobbs DataStax <http://datastax.com/>
