Hi So are you trying to use bucket cache feature in offheap mode with 1.1.2? If so then it is needed that the MaxDirectMemory is greater than the offheap bucket cache size.
If you are not using in offheap mode then probably there is no need for MaxDirectMemory to be greater than bucket cache size. >>in Hbase 0.98, I had to set -XX:MaxDirectMemorySize less than hbase.bucket.cache.size So even in 0.98 you were using bucket cache in offheap mode? Regards Ram On Tue, Sep 12, 2017 at 9:40 PM, Ted Yu <yuzhih...@gmail.com> wrote: > Looks like the config you meant should be hbase.bucketcache.size > > As the refguide says: > > A float that EITHER represents a percentage of total heap memory size to > give to the cache (if < 1.0) OR, it is the total capacity in megabytes of > BucketCache. Default: 0.0 > > If you specify the size as capacity, -XX:MaxDirectMemorySize should be > bigger than the capacity. > > For #2, did you encounter some error ? > > Cheers > > On Tue, Sep 12, 2017 at 8:52 AM, Arul Ramachandran <arkup...@gmail.com> > wrote: > > > In HBase 1.1.2, I am setting up bucket cache. I set MaxDirectMemory size > > greater than hbase.bucket.cache.size - only then it would work. > > > > 1) Does HBASE_REGIONSERVER_OPTS -XX:MaxDirectMemorySize needs to be > greater > > than hbase.bucket.cache.size? > > 2) It seems with hbase 1.1.2, HBASE_MASTER_OPTS also needs the > > -XX:MaxDirectMemorySize setting? > > > > IIRC, in Hbase 0.98, I had to set -XX:MaxDirectMemorySize less than > > hbase.bucket.cache.size --and-- I did not have to set > > -XX:MaxDirectMemorySize for HBASE_MASTER_OPTS. > > > > > > Thanks, > > Arul > > >
