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The following page has been changed by stack:
http://wiki.apache.org/hadoop/Hbase/FAQ

The comment on the change is:
performance notest

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  Some basic tests making the '''io.bytes.per.checksum''' larger -- changing it 
from checksum-checking every 4096 bytes instead of every 512 bytes -- seem to 
have no discernible effect on performance.
  
+ A couple of lads report that hbase runs faster when the cluster is balanced; 
see the balancer in hadoop, '''./bin/hadoop balancer'''.
+ 
+ As of hbase 0.19.0, giving hbase more memory for its caches to work with 
improves performance.
+ 
  
  '''8. [[Anchor(8)]] How do I access Hbase from my Ruby/Python/Perl/PHP/etc. 
application?'''
  

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