Actually not sometimes but we are always seeing a large # of .META. reads every 5 minutes.
On Mon, Jan 27, 2014 at 7:47 PM, Varun Sharma <[email protected]> wrote: > The default one with 0.94.7... - I dont see any of those logs. Also we > turned off the balancer switch - but looks like sometimes we still see a > large number of requests to .META. table every 5 minutes. > > Varun > > > On Mon, Jan 27, 2014 at 7:37 PM, Ted Yu <[email protected]> wrote: > >> In HMaster#balance(), we have (same for 0.94 and 0.96): >> >> for (RegionPlan plan: plans) { >> LOG.info("balance " + plan); >> >> Do you see such log in master log ? >> >> >> On Mon, Jan 27, 2014 at 7:26 PM, Varun Sharma <[email protected]> >> wrote: >> >> > We are seeing one other issue with high read latency (p99 etc.) on one >> of >> > our read heavy hbase clusters which is correlated with the balancer >> runs - >> > every 5 minutes. >> > >> > If there is no balancing to do, does the balancer only scan the table >> every >> > 5 minutes - does it do anything on top of that if the regions are >> balanced >> > ? >> > >> > Varun >> > >> > >
