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I just Upgrade CHD 5.4.7 to CDH 5.8.0 using Cloudera but there was an issue with hbase Performance

I just Upgrade CHD 5.4.7 to CDH 5.8.0 using Cloudera but there was an issue with hbase Performance

New Contributor

We have namenodes with 24GB of Physical Memory and 4 Datanodes with 64GB of Physical Memory each, We have runnig CDH version 5.4.7 and its working fine but we just Upgrade CDH 5.4.7(Hbase-1.0.0) to CDH 5.8.0(Hbase-1.2.0) using Cloudera Manager. We face an Issue with HBase, this Upgrade version makes Hbase Read/Write Operations nearly 50% Down and one another issue we notice is Heap Usage it also Increse in this new version. Is there any Configuration for fine tunning