Can you describe the 5 requests in more detail (were they gets / puts, how many rows were involved) ?
Can you take jstack of the busy region server and pastebin it ? Log snippet from the busy region server would also help. Cheers On Thu, Jan 12, 2017 at 1:23 AM, hongphong1805 <[email protected]> wrote: > Hi all, > I have 5 region servers and this is my config: > > Hardware: > 2 physical machines -> 7 vitural machines > Each vitural machine: > CPU: 8cores > RAM: 24GB > We are setup hadoop env with hortonwork 2.5 and setup HBase with 5 > RegionServer, 2 Hbase masters > Config: > export HBASE_HEAPSIZE=8000 > export HBASE_REGIONSERVER_OPTS="$HBASE_REGIONSERVER_OPTS -Xms8G -Xmx8g" > > When i excecute many queries on the same time, some regions has high CPU > usage (close 100%). So each query is very slow. > Test case: > + On single request: 3s > + On 5 requests on same times: (submit multi-requests from client): > 20s/request > I would highly appreciate your help. > Thanks > > > > -- > View this message in context: http://apache-hbase.679495.n3. > nabble.com/CPU-usage-on-region-servers-tp4085580.html > Sent from the HBase User mailing list archive at Nabble.com. >
