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doc-exports/docs/dws/dev/dws_04_0964.html
luhuayi 177cd61a57 DWS DEVG 910.211 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: luhuayi <luhuayi@huawei.com>
Co-committed-by: luhuayi <luhuayi@huawei.com>
2025-05-05 07:44:03 +00:00

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<a name="EN-US_TOPIC_0000001811491329"></a><a name="EN-US_TOPIC_0000001811491329"></a>
<h1 class="topictitle1">GLOBAL_COLUMN_TABLE_IO_STAT</h1>
<div id="body0000001194286329"><p id="EN-US_TOPIC_0000001811491329__p1319719112010"><strong id="EN-US_TOPIC_0000001811491329__b490612464517">GLOBAL_COLUMN_TABLE_IO_STAT</strong> provides I/O statistics of all column-store tables in the current database. The names, types, and sequences of the columns in the view are the same as those in the <strong id="EN-US_TOPIC_0000001811491329__b18350121291112">GS_COLUMN_TABLE_IO_STAT</strong> view. For details about the columns, see <a href="#EN-US_TOPIC_0000001811491329__table39829710387">Table 1</a>. The value of each statistical column is the sum of the values of the corresponding columns of all nodes.</p>
<div class="tablenoborder"><a name="EN-US_TOPIC_0000001811491329__table39829710387"></a><a name="table39829710387"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001811491329__table39829710387" frame="border" border="1" rules="all"><caption><b>Table 1 </b>GS_COLUMN_TABLE_IO_STAT columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row2032413817388"><th align="left" class="cellrowborder" valign="top" width="23.23%" id="mcps1.3.2.2.4.1.1"><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p113251813385"><strong id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_b211750593043557">Column</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="19.189999999999998%" id="mcps1.3.2.2.4.1.2"><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p133255863812">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="57.58%" id="mcps1.3.2.2.4.1.3"><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1132517833814">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row032528123811"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p73262893816">schemaname</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p183262817388">Name</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p632615813812">Namespace of a table</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row1632614893819"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1732678183813">relname</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1832612813810">Name</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p132798193815">Table name</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row173272817385"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p103271813380">heap_read</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p032778193816">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p632719843810">Number of blocks logically read in the heap</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row1327178143817"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p3327586383">heap_hit</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p193286833815">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p132816853816">Number of block hits in the heap</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row83289883811"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1432819853818">idx_read</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1932811814386">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p9328984383">Number of blocks logically read in the index</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row332911812385"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p332968203813">idx_hit</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p10329188133819">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p132918153820">Number of block hits in the index</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row2032915863812"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p83299811381">cu_read</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p18330108103820">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1833008183815">Number of logical reads in the Compression Unit</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row1433014817382"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p123301286385">cu_hit</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p1033078153810">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p11330487389">Number of hits in the Compression Unit</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row193308816388"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p163308810389">cidx_read</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p163311485381">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p15331118143811">Number of indexes logically read in the Compression Unit</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_row6331148173816"><td class="cellrowborder" valign="top" width="23.23%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p173312803815">cidx_hit</p>
</td>
<td class="cellrowborder" valign="top" width="19.189999999999998%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p833158153813">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="57.58%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491329__en-us_topic_0000001811490901_p193319853818">Number of index hits in the Compression Unit</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0639.html">System Views</a></div>
</div>
</div>
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