Hi Sharanya, Can you share your current GC settings and Java version. Are you using Java 8/9 w/ G1 already?
Regards, Johannes Sent from my iPhone > On Nov 28, 2017, at 12:57 PM, Sharanya Santhanam <ssanthan....@gmail.com> > wrote: > > Hello , > > I am currently trying to upgrade hive version on our prod clusters form V1.2 > to v2.1 > We also want to adopt HS2 on the new upgraded cluster. Earlier all queries > were submitted via Hive cli. > > Would like to understand how large a single HS2 Heap size can be ? And is > there any formula to figure out the how many concurrent sessions I can > support with this particular heap setting? > > > We currently have a upper limit of supporting 300 concurrent sessions ( > hive.server2.thrift.max.worker.threads=300). Based on this we set the max > heap size to 70 GB , but seeing many long GC pauses. > > > Would like to understand what is the industry standard for max HS2 Heap size. > Are there any recommendations on what JMV GC setting work best for supporting > such high number of concurrent sessions? > > Thanks, > Sharanya
