Can you thread dump the busy server and pastebin it? Thanks, St.Ack
On Wed, Sep 11, 2013 at 1:49 PM, OpenSource Dev <[email protected]>wrote: > Hi, > > I'm using HBase 0.94.6 (CDH 4.3) for Opentsdb. So far I have had no > issues with writes/puts. System is handles upto 800k puts per seconds > without issue. On average we do 250k puts per second. > > I am having the problem with Reads, I've also isolated where the > problem is but not been able to find the root cause. > > I have 16 machines running hbase-region server, each has ~35 regions. > Once in a while cpu goes flatout 80% in 1 region server. These are the > things i've noticed in ganglia: > > hbase.regionserver.request - evenly distributed. Not seeing any spikes > on the busy server > hbase.regionserver.blockCacheSize - between 500MB and 1000MB > hbase.regionserver.compactionQueueSize - avg 2 or less > hbase.regionserver.blockCacheHitRatio - 30% on busy node, >60% on other > nodes > > > JVM Heap size is set to 16GB and I'm using -XX:+UseParNewGC > -XX:+UseConcMarkSweepGC > > I've noticed the system load moves to a different region, sometimes > within a minute, if the busy region is restarted. > > Any suggestion what could be causing the load and/or what other > metrics should I check ? > > > Thank you! >
