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| <h1 class="title topictitle1" id="ariaid-title1">HBASE_CACHE_BLOCKS Query Option</h1> |
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| <p class="p"> |
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| Setting this option is equivalent to calling the |
| <code class="ph codeph">setCacheBlocks</code> method of the class <a class="xref" href="http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/client/Scan.html" target="_blank">org.apache.hadoop.hbase.client.Scan</a>, in an HBase Java |
| application. Helps to control the memory pressure on the HBase |
| RegionServer, in conjunction with the <code class="ph codeph">HBASE_CACHING</code> query |
| option. </p> |
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| <p class="p"> |
| <strong class="ph b">Type:</strong> Boolean; recognized values are 1 and 0, or <code class="ph codeph">true</code> and |
| <code class="ph codeph">false</code>; any other value interpreted as <code class="ph codeph">false</code> |
| </p> |
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| <strong class="ph b">Default:</strong> <code class="ph codeph">false</code> (shown as 0 in output of <code class="ph codeph">SET</code> |
| statement) |
| </p> |
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| <p class="p"> |
| <strong class="ph b">Related information:</strong> |
| </p> |
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| <p class="p"> |
| <a class="xref" href="impala_hbase.html#impala_hbase">Using Impala to Query HBase Tables</a>, |
| <a class="xref" href="impala_hbase_caching.html#hbase_caching">HBASE_CACHING Query Option</a> |
| </p> |
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| <div class="parentlink"><strong>Parent topic:</strong> <a class="link" href="../topics/impala_set.html">SET Statement</a></div> |
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