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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_0000001839791918"></a><a name="EN-US_TOPIC_0000001839791918"></a>
<h1 class="topictitle1">PGXC_DISK_CACHE_PATH_INFO</h1>
<div id="body0000001839791918"><p id="EN-US_TOPIC_0000001839791918__p58467294114"><strong id="EN-US_TOPIC_0000001839791918__b115061747132913">PGXC_DISK_CACHE_PATH_INFO</strong> records information about the hard disk where the file cache is stored. This system view is supported only by clusters of version 9.1.0 or later.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001839791918__table1493616359122" frame="border" border="1" rules="all"><caption><b>Table 1 </b>PGXC_DISK_CACHE_PATH_INFO columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001839791918__row20936123581215"><th align="left" class="cellrowborder" valign="top" width="26.19%" id="mcps1.3.2.2.4.1.1"><p id="EN-US_TOPIC_0000001839791918__p13936335181217"><strong id="EN-US_TOPIC_0000001839791918__b15992624104385">Column</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="19.46%" id="mcps1.3.2.2.4.1.2"><p id="EN-US_TOPIC_0000001839791918__p69361835101220">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="54.35%" id="mcps1.3.2.2.4.1.3"><p id="EN-US_TOPIC_0000001839791918__p14936113516122">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001839791918__row993683515122"><td class="cellrowborder" valign="top" width="26.19%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001839791918__p159363353122">path_name</p>
</td>
<td class="cellrowborder" valign="top" width="19.46%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001839791918__p1093714354128">Text</p>
</td>
<td class="cellrowborder" valign="top" width="54.35%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001839791918__p1937163519125">Path name.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001839791918__row165202377251"><td class="cellrowborder" valign="top" width="26.19%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001839791918__p852193772512">node_name</p>
</td>
<td class="cellrowborder" valign="top" width="19.46%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001839791918__p75219379254">Text</p>
</td>
<td class="cellrowborder" valign="top" width="54.35%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001839791918__p6521173732517">Name of the node the hard disk belongs to.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001839791918__row68041841142514"><td class="cellrowborder" valign="top" width="26.19%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001839791918__p5804124114255">cache_size</p>
</td>
<td class="cellrowborder" valign="top" width="19.46%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001839791918__p1580484122519">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="54.35%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001839791918__p10804154162511">Total size of cache files in the hard disk, in bytes.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001839791918__row1817104822914"><td class="cellrowborder" valign="top" width="26.19%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001839791918__p817148112912">disk_available</p>
</td>
<td class="cellrowborder" valign="top" width="19.46%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001839791918__p19171548202912">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="54.35%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001839791918__p171715480292">Available space in the hard disk, in bytes.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001839791918__row17471621113011"><td class="cellrowborder" valign="top" width="26.19%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001839791918__p0747122112302">disk_size</p>
</td>
<td class="cellrowborder" valign="top" width="19.46%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001839791918__p37481221113014">Bigint</p>
</td>
<td class="cellrowborder" valign="top" width="54.35%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001839791918__p3748102153012">Total capacity of the hard drive, in bytes.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001839791918__row122281728203017"><td class="cellrowborder" valign="top" width="26.19%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001839791918__p2228128153011">disk_use_ratio</p>
</td>
<td class="cellrowborder" valign="top" width="19.46%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001839791918__p3228152853018">Double precision</p>
</td>
<td class="cellrowborder" valign="top" width="54.35%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001839791918__p1228152810301">Disk space usage.</p>
</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="EN-US_TOPIC_0000001839791918__section5457134413168"><h4 class="sectiontitle">Example</h4><p id="EN-US_TOPIC_0000001839791918__p205031176173">Query information about the hard disk used by the file cache.</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001839791918__screen714311131817"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span>
<span class="normal">6</span>
<span class="normal">7</span>
<span class="normal">8</span>
<span class="normal">9</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pgxc_disk_cache_path_info</span><span class="w"> </span><span class="k">order</span><span class="w"> </span><span class="k">by</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span>
<span class="w"> </span><span class="n">path_name</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">node_name</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">cache_size</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">disk_available</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">disk_size</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">disk_use_ratio</span>
<span class="c1">----------------+--------------+------------+----------------+--------------+------------------</span>
<span class="w"> </span><span class="n">dn_6001_6002_0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dn_6001_6002</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">19619</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">137401716736</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">160982630400</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">.</span><span class="mi">146481105479564</span>
<span class="w"> </span><span class="n">dn_6001_6002_1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dn_6001_6002</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">35968</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">137401716736</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">160982630400</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">.</span><span class="mi">146481105479564</span>
<span class="w"> </span><span class="n">dn_6003_6004_0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dn_6003_6004</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">27794</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">121600655360</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">160982630400</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">.</span><span class="mi">244634933235629</span>
<span class="w"> </span><span class="n">dn_6003_6004_1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dn_6003_6004</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">26158</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">121600655360</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">160982630400</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">.</span><span class="mi">244634933235629</span>
<span class="w"> </span><span class="n">dn_6005_6006_0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dn_6005_6006</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">24533</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">134394839040</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">160982630400</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">.</span><span class="mi">165159379579873</span>
<span class="w"> </span><span class="n">dn_6005_6006_1</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dn_6005_6006</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">31065</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">134394839040</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">160982630400</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="p">.</span><span class="mi">165159379579873</span>
</pre></div></td></tr></table></div>
</div>
</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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