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| <!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
| <concept id="hbase_cache_blocks"> |
| |
| <title>HBASE_CACHE_BLOCKS Query Option</title> |
| <titlealts audience="PDF"><navtitle>HBASE_CACHE_BLOCKS</navtitle></titlealts> |
| <prolog> |
| <metadata> |
| <data name="Category" value="Impala"/> |
| <data name="Category" value="HBase"/> |
| <data name="Category" value="Impala Query Options"/> |
| <data name="Category" value="Developers"/> |
| <data name="Category" value="Data Analysts"/> |
| </metadata> |
| </prolog> |
| |
| <conbody> |
| |
| <p> |
| <indexterm audience="hidden">HBASE_CACHE_BLOCKS query option</indexterm> |
| Setting this option is equivalent to calling the |
| <codeph>setCacheBlocks</codeph> method of the class <xref |
| href="http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Scan.html" |
| scope="external" format="html" |
| >org.apache.hadoop.hbase.client.Scan</xref>, in an HBase Java |
| application. Helps to control the memory pressure on the HBase |
| RegionServer, in conjunction with the <codeph>HBASE_CACHING</codeph> query |
| option. </p> |
| |
| <p conref="../shared/impala_common.xml#common/type_boolean"/> |
| <p conref="../shared/impala_common.xml#common/default_false_0"/> |
| |
| <p conref="../shared/impala_common.xml#common/related_info"/> |
| <p> |
| <xref href="impala_hbase.xml#impala_hbase"/>, |
| <xref href="impala_hbase_caching.xml#hbase_caching"/> |
| </p> |
| |
| </conbody> |
| </concept> |