When is the last time you did a cleanup on the cf? On Mar 2, 2013, at 9:48 AM, "Víctor Hugo Oliveira Molinar" <vhmoli...@gmail.com> wrote:
> Hello guys. > I'm investigating the reasons of performance degradation for my case scenario > which follows: > > - I do have a column family which is filled of thousands of columns inside a > unique row(varies between 10k ~ 200k). And I do have also thousands of rows, > not much more than 15k. > - This rows are constantly updated. But the write-load is not that intensive. > I estimate it as 100w/sec in the column family. > - Each column represents a message which is read and processed by another > process. After reading it, the column is marked for deletion in order to keep > it out from the next query on this row. > > Ok, so, I've been figured out that after many insertions plus deletion > updates, my queries( column slice query ) are taking more time to be > performed. Even if there are only few columns, lower than 100. > > So it looks like that the longer is the number of columns being deleted, the > longer is the time spent for a query. > -> Internally at C*, does column slice query ranges among deleted columns? > If so, how can I mitigate the impact in my queries? Or, how can I avoid those > deleted columns? Copy, by Barracuda, helps you store, protect, and share all your amazing things. Start today: www.copy.com.
