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Lu, Huayi e6fa411af0 DWS DEV 830.201 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2024-05-16 07:24:04 +00:00

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<a name="EN-US_TOPIC_0000001188642006"></a><a name="EN-US_TOPIC_0000001188642006"></a>
<h1 class="topictitle1">PGXC_GET_STAT_ALL_TABLES</h1>
<div id="body1529378211887"><p id="EN-US_TOPIC_0000001188642006__p2344191412188"><strong id="EN-US_TOPIC_0000001188642006__b1412215128817">PGXC_GET_STAT_ALL_TABLES</strong> displays information about insertion, update, and deletion operations on tables and the dirty page rate of tables.</p>
<p id="EN-US_TOPIC_0000001188642006__p1969101511215">Before running <strong id="EN-US_TOPIC_0000001188642006__b84235270618228">VACUUM FULL</strong> on a system catalog with a high dirty page rate, ensure that no user is performing operations on it. You are advised to run <strong id="EN-US_TOPIC_0000001188642006__b227125795713">VACUUM FULL</strong> to tables (excluding system catalogs) whose dirty page rate exceeds 80% or run it based on service scenarios.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001188642006__t09d8e10f76724678a8f221dd29db736a" frame="border" border="1" rules="all"><caption><b>Table 1 </b>PGXC_GET_STAT_ALL_TABLES columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001188642006__r296db8ff4a4f4195b3fd7d935ac3436d"><th align="left" class="cellrowborder" valign="top" width="33.33%" id="mcps1.3.3.2.4.1.1"><p id="EN-US_TOPIC_0000001188642006__aabed0b68691942108b0e3aa157377da7">Name</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="17.919999999999998%" id="mcps1.3.3.2.4.1.2"><p id="EN-US_TOPIC_0000001188642006__aae8adcb14b634a4793c5c29a8ded37cd">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="48.75%" id="mcps1.3.3.2.4.1.3"><p id="EN-US_TOPIC_0000001188642006__a4d5efd63bff341d59af7eb1359385af9">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001188642006__r4058f6bdc9254911b191aa0e08d7edb6"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p1160011111301">relid</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__ac9c372b991894c798b9fecec1fe03ea8">oid</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__aa4d470d9917d4fedbce5cd58c754ce42">Table OID</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__r9a69c15440fd4b3d86b38804ac7efffd"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p155841225203011">relname</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__a6f502ef221ec4b8d8e5393022effc5bd">name</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__a13de41723a05484d86ab3c303d4c522a">Table name</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__row1596942488"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p897184184816">schemaname</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__p89817484814">name</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__p1099145484">Schema name of the table</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__r3b0439badf02493a9fc3a84029209848"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p1219664054117">n_tup_ins</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__a32fd73348caf4482ad7acd39e5abfe13">numeric</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__aca413da9e4ea45aba0d8b389dcf956ec">Number of inserted tuples</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__row204781949282"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p194796491814">n_tup_upd</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__p3479124915820">numeric</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__p204793499820">Number of updated tuples</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__row4302327154218"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p14386104410421">n_tup_del</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__p173030279421">numeric</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__p1130472764213">Number of deleted tuples</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__row174687374424"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p04691337114217">n_live_tup</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__p20469133724219">numeric</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__p154709379429">Number of live tuples</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__row157104984219"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p16874914210">n_dead_tup</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__p179134915423">numeric</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__p199174924217">Number of dead tuples</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001188642006__row14389195612816"><td class="cellrowborder" valign="top" width="33.33%" headers="mcps1.3.3.2.4.1.1 "><p id="EN-US_TOPIC_0000001188642006__p1118111812436">dirty_page_rate</p>
</td>
<td class="cellrowborder" valign="top" width="17.919999999999998%" headers="mcps1.3.3.2.4.1.2 "><p id="EN-US_TOPIC_0000001188642006__p1636555125610">numeric(5,2)</p>
</td>
<td class="cellrowborder" valign="top" width="48.75%" headers="mcps1.3.3.2.4.1.3 "><p id="EN-US_TOPIC_0000001188642006__p14390856089">Dirty page rate (%) of a table</p>
</td>
</tr>
</tbody>
</table>
</div>
<p id="EN-US_TOPIC_0000001188642006__p7144134015111"><span id="EN-US_TOPIC_0000001188642006__text347221151915">GaussDB(DWS)</span> also provides the <strong id="EN-US_TOPIC_0000001188642006__b38951323161616">pgxc_get_stat_dirty_tables(int dirty_percent, int n_tuples)</strong> and <strong id="EN-US_TOPIC_0000001188642006__b16895152310165">pgxc_get_stat_dirty_tables(int dirty_percent, int n_tuples, text schema)</strong> functions to quickly filter out tables whose dirty page rate is greater than <strong id="EN-US_TOPIC_0000001188642006__b7895923101618">dirty_percent</strong>, number of dead tuples is greater than <strong id="EN-US_TOPIC_0000001188642006__b1589692381616">n_tuples</strong>, and schema name is <strong id="EN-US_TOPIC_0000001188642006__b18896142317166">schema</strong>.</p>
<p id="EN-US_TOPIC_0000001188642006__p53681820141514">For details, see "Functions and Operators &gt; System Administration Functions &gt; Other Functions" in the <em id="EN-US_TOPIC_0000001188642006__i6781171414172">SQL Syntax</em>.</p>
<div class="section" id="EN-US_TOPIC_0000001188642006__section711519247238"><h4 class="sectiontitle">Examples</h4><p id="EN-US_TOPIC_0000001188642006__p419911338232">Use the view <strong id="EN-US_TOPIC_0000001188642006__b472262175811">PGXC_GET_STAT_ALL_TABLES</strong> to query the tables whose dirty page rate is greater than 30%.</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001188642006__screen659973412145"><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>
<span class="normal">10</span>
<span class="normal">11</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_GET_STAT_ALL_TABLES</span><span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="n">dirty_page_rate</span><span class="o">&gt;</span><span class="mi">30</span><span class="p">;</span>
<span class="w"> </span><span class="n">relid</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">relname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">schemaname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">n_tup_ins</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">n_tup_upd</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">n_tup_del</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">n_live_tup</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">n_dead_tup</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dirty_page_rate</span>
<span class="c1">-------+-------------------------+------------+-----------+-----------+-----------+------------+------------+-----------------</span>
<span class="w"> </span><span class="mi">2840</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_toast_2619</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_toast</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">7415</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">7415</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">291</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">88</span><span class="p">.</span><span class="mi">00</span>
<span class="w"> </span><span class="mi">9001</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pgxc_class</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">56331</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">3</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">56285</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">54</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">143</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">72</span><span class="p">.</span><span class="mi">59</span>
<span class="w"> </span><span class="mi">53860</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">reason</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dbadmin</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">19</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">9</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">19</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">67</span><span class="p">.</span><span class="mi">86</span>
<span class="w"> </span><span class="mi">9025</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_object</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">112858</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">1179707</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">112619</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">246</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">429</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">63</span><span class="p">.</span><span class="mi">56</span>
<span class="w"> </span><span class="mi">9015</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pgxc_node</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">15</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">24</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">15</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">24</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">61</span><span class="p">.</span><span class="mi">54</span>
<span class="w"> </span><span class="mi">2606</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_constraint</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">78</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">42</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">36</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">42</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">53</span><span class="p">.</span><span class="mi">85</span>
<span class="w"> </span><span class="mi">1260</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_authid</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">0</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">6</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">50</span><span class="p">.</span><span class="mi">00</span>
<span class="p">(</span><span class="mi">7</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
</div>
<p id="EN-US_TOPIC_0000001188642006__p169531028112819">You can also use the <strong id="EN-US_TOPIC_0000001188642006__b156391518175912">pgxc_get_stat_dirty_tables</strong> function to query tables whose dirty page rate is greater than 10% and number of dirty data rows is greater than 1000.</p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001188642006__screen9267194012814"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">a</span><span class="p">.</span><span class="n">schemaname</span><span class="p">,</span><span class="n">a</span><span class="p">.</span><span class="n">relname</span><span class="p">,</span><span class="n">pg_size_pretty</span><span class="p">(</span><span class="n">pg_table_size</span><span class="p">(</span><span class="n">b</span><span class="p">.</span><span class="n">oid</span><span class="p">)),</span><span class="n">a</span><span class="p">.</span><span class="n">dirty_page_rate</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">pgxc_get_stat_dirty_tables</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span><span class="mi">1000</span><span class="p">)</span><span class="w"> </span><span class="n">a</span><span class="p">,</span><span class="n">pg_catalog</span><span class="p">.</span><span class="n">pg_class</span><span class="w"> </span><span class="n">b</span><span class="w"> </span><span class="k">WHERE</span><span class="w"> </span><span class="n">a</span><span class="p">.</span><span class="n">relname</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">b</span><span class="p">.</span><span class="n">relname</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="n">pg_table_size</span><span class="p">(</span><span class="n">b</span><span class="p">.</span><span class="n">oid</span><span class="p">)</span><span class="w"> </span><span class="k">desc</span><span class="p">;</span>
<span class="w"> </span><span class="n">schemaname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">relname</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_size_pretty</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">dirty_page_rate</span>
<span class="c1">------------+--------------+----------------+-----------------</span>
<span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_attribute</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">2792</span><span class="w"> </span><span class="n">KB</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">12</span><span class="p">.</span><span class="mi">09</span>
<span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_class</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">568</span><span class="w"> </span><span class="n">KB</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">15</span><span class="p">.</span><span class="mi">36</span>
<span class="w"> </span><span class="n">pg_catalog</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">pg_type</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">368</span><span class="w"> </span><span class="n">KB</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="mi">12</span><span class="p">.</span><span class="mi">17</span>
<span class="p">(</span><span class="mi">3</span><span class="w"> </span><span class="k">rows</span><span class="p">)</span>
</pre></div></td></tr></table></div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_0639.html">System Views</a></div>
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