Hi Ding, I have increased the Heap to 2G , still getting out of memory exception . Actually i had write the data to HBase at 40K writes/sec . Is there any parameter to tune up , as my knowledge "- XX:CMSInitiatingOccupancyFraction=N " i tuned like this in HBase. Is there any other parameter required to resolve this issue???
Best, Karthik On Thu, Apr 14, 2016 at 12:21 PM, Ding,Dongchao <dingdongc...@baidu.com> wrote: > Dump the jvm heap，analysis the the heap and find which query(s) cost so > many memory？ > In my ever bad case，the RS crashed for Long GC pauses because of a big > query on Batch Get operation. > > > In addition，I think you can increase the men of JVM, 512m is so small for > RS. > > > > 在 16/4/14 14:00， "karthi keyan" <karthi93.san...@gmail.com> 写入: > > >Hi , > > > >i got this issue in HBase while at peak time handling more requests . can > >any one pls guide me to resolve the Long GC pauses in hbase . > > > >JDK-7 , JVM heap 512m > > > >HBase 0.98.13 > > > > > > INFO [JvmPauseMonitor] util.JvmPauseMonitor: Detected pause in JVM or > >host machine (eg GC): pause of approximately 1466ms > >GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=1967ms > > INFO [JvmPauseMonitor] util.JvmPauseMonitor: Detected pause in JVM or > >host machine (eg GC): pause of approximately 2304ms > >GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=2775ms > > INFO [JvmPauseMonitor] util.JvmPauseMonitor: Detected pause in JVM or > >host machine (eg GC): pause of approximately 2287ms > >GC pool 'ConcurrentMarkSweep' had collection(s): count=1 time=2775ms > > > > INFO [RS:0;0:0:0:0:0:0:0:0:44037-SendThread(<host>:2181)] > >zookeeper.ClientCnxn: Client session timed out, have not heard from server > >in 6819ms for sessionid 0x1540ab48b280004, closing socket connection and > >attempting reconnect > > INFO [SplitLogWorker-<host>,44037,1460468489645-SendThread(<host>:2181)] > >zookeeper.ClientCnxn: Client session timed out, have not heard from server > >in 6819ms for sessionid 0x1540ab48b280005, closing socket connection and > >attempting reconnect > > > >Once after this HBase Region Server moved to Dead state. > > > >Best, > >Karthik > >
