On Mon, Nov 30, 2015 at 10:35 PM, Stack <[email protected]> wrote: > On Fri, Nov 27, 2015 at 10:11 AM, Mukesh Jha <[email protected]> > wrote: > > > I'm working with cloudera hbase v0.98, my HBase table has ~5k regions. > > > > > How many servers do you have carrying the 5k regions? > I've 50 nodes hosting these regions.
> > > > From the cloudera UI charts i see a lot of get & scan operations active > on > > my table even after i shut down all the reader applications. > > > > > Then, there must be an application still running? I think cloudera's total_get_rates care cumulative in nature (total_read_requests_rate_across_regionservers but graph sows rate in ops/sec so still confused here) and hence are showing up in the graph. When I check per table get/scan rates () they come down to 0 on bringing down all the applications. SELECT total_scan_next_rate_across_hregions // shows rate at ~5k operations/sec SELECT scan_next_rate // shows~500 operations/sec > > > > I'm suspecting that this is impacting my scan performance. > > > > So I'd like to know if there is a way by which i can identify the hosts > > calling these get/scan operations? I tried netstat and similar linux > > commands without much luck. > > > > You can do as Samir suggests. You could also do it on one server only > temporarily via the RegionServer UI. Look along the top of the webpage for > Log Level. > I'm planning to do that but that'd need a regions server restart, is there any other way I can trace the calls? > > St.Ack > -- Thanks & Regards, *Mukesh Jha <[email protected]>*
