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| <div class="subTitle">org.apache.drill.exec.store.parquet.columnreaders.batchsizing</div> |
| <h2 title="Class BatchSizingMemoryUtil" class="title">Class BatchSizingMemoryUtil</h2> |
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| <ul class="inheritance"> |
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| <li>org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil</li> |
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| <pre>public final class <span class="typeNameLabel">BatchSizingMemoryUtil</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Helper class to assist the Flat Parquet reader build batches which adhere to memory sizing constraints</div> |
| </li> |
| </ul> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.ColumnMemoryUsageInfo.html" title="class in org.apache.drill.exec.store.parquet.columnreaders.batchsizing">BatchSizingMemoryUtil.ColumnMemoryUsageInfo</a></span></code> |
| <div class="block">A container class to hold a column batch memory usage information.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.VectorMemoryUsageInfo.html" title="class in org.apache.drill.exec.store.parquet.columnreaders.batchsizing">BatchSizingMemoryUtil.VectorMemoryUsageInfo</a></span></code> |
| <div class="block">Container class which holds memory usage information about a variable length <a href="../../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector"><code>ValueVector</code></a>; |
| all values are in bytes.</div> |
| </td> |
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| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#BYTE_VALUE_WIDTH">BYTE_VALUE_WIDTH</a></span></code> |
| <div class="block">BYTE in-memory width</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#DEFAULT_VL_COLUMN_AVG_PRECISION">DEFAULT_VL_COLUMN_AVG_PRECISION</a></span></code> |
| <div class="block">Default variable length column average precision; |
| computed in such a way that 64k values will fit within one MB to minimize internal fragmentation</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#INT_VALUE_WIDTH">INT_VALUE_WIDTH</a></span></code> |
| <div class="block">INT in-memory width</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <h3>Method Summary</h3> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#canAddNewData-org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.ColumnMemoryUsageInfo-long-long-long-">canAddNewData</a></span>(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.ColumnMemoryUsageInfo.html" title="class in org.apache.drill.exec.store.parquet.columnreaders.batchsizing">BatchSizingMemoryUtil.ColumnMemoryUsageInfo</a> columnMemoryUsage, |
| long newBitsMemory, |
| long newOffsetsMemory, |
| long newDataMemory)</code> |
| <div class="block">This method will also load detailed information about this column's current memory usage (with regard |
| to the value vectors).</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#computeFixedLengthVectorMemory-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-int-">computeFixedLengthVectorMemory</a></span>(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column, |
| int valueCount)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#computeVariableLengthVectorMemory-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-long-int-">computeVariableLengthVectorMemory</a></span>(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column, |
| long averagePrecision, |
| int valueCount)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#getAvgVariableLengthColumnTypePrecision-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-">getAvgVariableLengthColumnTypePrecision</a></span>(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column)</code> |
| <div class="block">This method will return a default value for variable columns; it aims at minimizing internal fragmentation.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#getFixedColumnTypePrecision-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-">getFixedColumnTypePrecision</a></span>(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.html#getMemoryUsage-org.apache.drill.exec.vector.ValueVector-int-org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.VectorMemoryUsageInfo-">getMemoryUsage</a></span>(<a href="../../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a> sourceVector, |
| int currValueCount, |
| <a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.VectorMemoryUsageInfo.html" title="class in org.apache.drill.exec.store.parquet.columnreaders.batchsizing">BatchSizingMemoryUtil.VectorMemoryUsageInfo</a> vectorMemoryUsage)</code> |
| <div class="block">Load memory usage information for a variable length value vector</div> |
| </td> |
| </tr> |
| </table> |
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| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <!-- ============ FIELD DETAIL =========== --> |
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| </a> |
| <h3>Field Detail</h3> |
| <a name="BYTE_VALUE_WIDTH"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>BYTE_VALUE_WIDTH</h4> |
| <pre>public static final int BYTE_VALUE_WIDTH</pre> |
| <div class="block">BYTE in-memory width</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.BYTE_VALUE_WIDTH">Constant Field Values</a></dd> |
| </dl> |
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| <a name="INT_VALUE_WIDTH"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>INT_VALUE_WIDTH</h4> |
| <pre>public static final int INT_VALUE_WIDTH</pre> |
| <div class="block">INT in-memory width</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.INT_VALUE_WIDTH">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="DEFAULT_VL_COLUMN_AVG_PRECISION"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>DEFAULT_VL_COLUMN_AVG_PRECISION</h4> |
| <pre>public static final int DEFAULT_VL_COLUMN_AVG_PRECISION</pre> |
| <div class="block">Default variable length column average precision; |
| computed in such a way that 64k values will fit within one MB to minimize internal fragmentation</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../../../constant-values.html#org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.DEFAULT_VL_COLUMN_AVG_PRECISION">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="canAddNewData-org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.ColumnMemoryUsageInfo-long-long-long-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>canAddNewData</h4> |
| <pre>public static boolean canAddNewData(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.ColumnMemoryUsageInfo.html" title="class in org.apache.drill.exec.store.parquet.columnreaders.batchsizing">BatchSizingMemoryUtil.ColumnMemoryUsageInfo</a> columnMemoryUsage, |
| long newBitsMemory, |
| long newOffsetsMemory, |
| long newDataMemory)</pre> |
| <div class="block">This method will also load detailed information about this column's current memory usage (with regard |
| to the value vectors).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>columnMemoryUsage</code> - container which contains column's memory usage information (usage information will |
| be automatically updated by this method)</dd> |
| <dd><code>newBitsMemory</code> - New nullable data which might be inserted when processing a new input chunk</dd> |
| <dd><code>newOffsetsMemory</code> - New offsets data which might be inserted when processing a new input chunk</dd> |
| <dd><code>newDataMemory</code> - New data which might be inserted when processing a new input chunk</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if adding the new data will not lead this column's Value Vector go beyond the allowed |
| limit; false otherwise</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMemoryUsage-org.apache.drill.exec.vector.ValueVector-int-org.apache.drill.exec.store.parquet.columnreaders.batchsizing.BatchSizingMemoryUtil.VectorMemoryUsageInfo-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getMemoryUsage</h4> |
| <pre>public static void getMemoryUsage(<a href="../../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a> sourceVector, |
| int currValueCount, |
| <a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/batchsizing/BatchSizingMemoryUtil.VectorMemoryUsageInfo.html" title="class in org.apache.drill.exec.store.parquet.columnreaders.batchsizing">BatchSizingMemoryUtil.VectorMemoryUsageInfo</a> vectorMemoryUsage)</pre> |
| <div class="block">Load memory usage information for a variable length value vector</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>sourceVector</code> - source value vector</dd> |
| <dd><code>currValueCount</code> - current value count</dd> |
| <dd><code>vectorMemoryUsage</code> - result object which contains source vector memory usage information</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getFixedColumnTypePrecision-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getFixedColumnTypePrecision</h4> |
| <pre>public static int getFixedColumnTypePrecision(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>column</code> - fixed column's metadata</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>column byte precision</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getAvgVariableLengthColumnTypePrecision-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>getAvgVariableLengthColumnTypePrecision</h4> |
| <pre>public static int getAvgVariableLengthColumnTypePrecision(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column)</pre> |
| <div class="block">This method will return a default value for variable columns; it aims at minimizing internal fragmentation. |
| <p><b>Note</b> that the <a href="../../../../../../../../org/apache/drill/exec/expr/TypeHelper.html" title="class in org.apache.drill.exec.expr"><code>TypeHelper</code></a> uses a large default value which might not be always appropriate.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>column</code> - fixed column's metadata</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>column byte precision</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="computeFixedLengthVectorMemory-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>computeFixedLengthVectorMemory</h4> |
| <pre>public static long computeFixedLengthVectorMemory(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column, |
| int valueCount)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>column</code> - column's metadata</dd> |
| <dd><code>valueCount</code> - number of column values</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>memory size required to store "valueCount" within a value vector</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="computeVariableLengthVectorMemory-org.apache.drill.exec.store.parquet.columnreaders.ParquetColumnMetadata-long-int-"> |
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| <h4>computeVariableLengthVectorMemory</h4> |
| <pre>public static long computeVariableLengthVectorMemory(<a href="../../../../../../../../org/apache/drill/exec/store/parquet/columnreaders/ParquetColumnMetadata.html" title="class in org.apache.drill.exec.store.parquet.columnreaders">ParquetColumnMetadata</a> column, |
| long averagePrecision, |
| int valueCount)</pre> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>column</code> - length column's metadata</dd> |
| <dd><code>averagePrecision</code> - VL column average precision</dd> |
| <dd><code>valueCount</code> - number of column values</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>memory size required to store "valueCount" within a value vector</dd> |
| </dl> |
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