Seems like it just ran out of memory again and was not hanging. I tried to append a limit 100 to the select query and it still runs out of memory, Just ran the CTAS against some other smaller tables and it works fine.
I will play around with this some more on the weekend, I can only assume I am messing something up here, I have in the past created parquet files from large tables without any issue, will report back. Thanks On Fri, May 13, 2016 at 10:05 AM Abdel Hakim Deneche <[email protected]> wrote: > Stefan, > > Can you share the query profile for the query that seems to be running > forever ? you won't find it on disk but you can append .json to the profile > web url and save the file. > > Thanks > > On Fri, May 13, 2016 at 9:55 AM, Stefan Sedich <[email protected]> > wrote: > > > Zelaine, > > > > It does, I forgot about those ones, I will do a test where I filter those > > out and see how I go, in my test with a 12GB heap size it seemed to just > > sit there forever and not finish. > > > > > > Thanks > > > > On Fri, May 13, 2016 at 9:50 AM Zelaine Fong <[email protected]> wrote: > > > > > Stefan, > > > > > > Does your source data contain varchar columns? We've seen instances > > where > > > Drill isn't as efficient as it can be when Parquet is dealing with > > variable > > > length columns. > > > > > > -- Zelaine > > > > > > On Fri, May 13, 2016 at 9:26 AM, Stefan Sedich < > [email protected]> > > > wrote: > > > > > > > Thanks for getting back to me so fast! > > > > > > > > I was just playing with that now, went up to 8GB and still ran into > it, > > > > trying to go higher to see if I can find the sweet spot, only got > 16GB > > > > total RAM on this laptop :) > > > > > > > > Is this an expected amount of memory for not an overly huge table (16 > > > > million rows, 6 columns of integers), even now at a 12GB heap seems > to > > > have > > > > filled up again. > > > > > > > > > > > > > > > > Thanks > > > > > > > > On Fri, May 13, 2016 at 9:20 AM Jason Altekruse <[email protected]> > > > wrote: > > > > > > > > > I could not find anywhere this is mentioned in the docs, but it has > > > come > > > > up > > > > > a few times one the list. While we made a number of efforts to move > > our > > > > > interactions with the Parquet library to the off-heap memory (which > > we > > > > use > > > > > everywhere else in the engine during processing) the version of the > > > > writer > > > > > we are using still buffers a non-trivial amount of data into heap > > > memory > > > > > when writing parquet files. Try raising your JVM heap memory in > > > > > drill-env.sh on startup and see if that prevents the out of memory > > > issue. > > > > > > > > > > Jason Altekruse > > > > > Software Engineer at Dremio > > > > > Apache Drill Committer > > > > > > > > > > On Fri, May 13, 2016 at 9:07 AM, Stefan Sedich < > > > [email protected]> > > > > > wrote: > > > > > > > > > > > Just trying to do a CTAS on a postgres table, it is not huge and > > only > > > > has > > > > > > 16 odd million rows, I end up with an out of memory after a > while. > > > > > > > > > > > > Unable to handle out of memory condition in FragmentExecutor. > > > > > > > > > > > > java.lang.OutOfMemoryError: GC overhead limit exceeded > > > > > > > > > > > > > > > > > > Is there a way to avoid this without needing to do the CTAS on a > > > subset > > > > > of > > > > > > my table? > > > > > > > > > > > > > > > > > > > > > > > > -- > > Abdelhakim Deneche > > Software Engineer > > <http://www.mapr.com/> > > > Now Available - Free Hadoop On-Demand Training > < > http://www.mapr.com/training?utm_source=Email&utm_medium=Signature&utm_campaign=Free%20available > > >
