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Enhance memory allocation when replicating wide tables to webhdfs
To avoid webhdfs BufferOverflowException errors the workaround is to set hdfs_write_cache_mb to total size of table x 4 in MB. The memory allocated at startup of the subscription is the hdfs_write_cache_mb * # of tables regardless of the width of each of the tables. When replicating a wide tables within a subscription including numerous other tables the memory consumption requirements are excessive. In the customers environment over 40GB of real memory was required to startup a subscription. (See PMR for details)
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