Hi ,

 Our environment
hbase 90.2 (10 machine)
    We have 10 machine grid:
    master has 48G ram
    slaves machine has 16G ram.
    Region Server process has 4G ram
    Zookeeper process has 2G ram
     We have 4map/2reducer per machine


We write from m/r job to hbase (2 jobs a day).  3 months system works
without any problem , but now  every 3/4 days region server crashes.
   What we done so far:
   1) We running major compaction manually once a day
   2) We increases regions size to prevent automatic split.

Question:
   What is the way to make a HBase tuning ?
   How to debug such problem , because it is still not clear for me what is
the root  cause of region's crashes?



   We started from this post.
http://search-hadoop.com/m/HDoK22ikTCI/M%252FR+vs+hbase+problem+in+production&subj=M+R+vs+hbase+problem+in+production


<http://search-hadoop.com/m/HDoK22ikTCI/M%252FR+vs+hbase+problem+in+production&subj=M+R+vs+hbase+problem+in+production>
Regards
Oleg.

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