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doc-exports/docs/dws/dev/dws_04_0831.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_0000001811491177"></a><a name="EN-US_TOPIC_0000001811491177"></a>
<h1 class="topictitle1">PGXC_VARIABLE_INFO</h1>
<div id="body1562579026932"><p id="EN-US_TOPIC_0000001811491177__p02888151491"><strong id="EN-US_TOPIC_0000001811491177__b19298181319020">PGXC_VARIABLE_INFO</strong> displays information about XIDs and OIDs of all nodes in a cluster.</p>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001811491177__table118381565499" frame="border" border="1" rules="all"><caption><b>Table 1 </b>PGXC_VARIABLE_INFO columns</caption><thead align="left"><tr id="EN-US_TOPIC_0000001811491177__row0838195616495"><th align="left" class="cellrowborder" valign="top" width="22.6022602260226%" id="mcps1.3.2.2.4.1.1"><p id="EN-US_TOPIC_0000001811491177__afbe7fe3528aa4d23a961fb047a3be366"><strong id="EN-US_TOPIC_0000001811491177__b119210106943850">Column</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="19.001900190019004%" id="mcps1.3.2.2.4.1.2"><p id="EN-US_TOPIC_0000001811491177__a32766e1c79fc45b5a8bc604d73582551">Type</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="58.3958395839584%" id="mcps1.3.2.2.4.1.3"><p id="EN-US_TOPIC_0000001811491177__a37865a77d1a4411998bbb8d0892f7e33">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001811491177__row583935615493"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p8824359510">node_name</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p2485111625110">Text</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p34661427155115">Node name.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row18393569491"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p1682414510511">nextOid</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p104851816205112">OID</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p17466202755119">Next OID to be generated under this node.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row12839195614918"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p9824185125117">nextXid</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p144857167517">Xid</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p2467182735119">Next transaction OID to be generated under this node.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row284075674919"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p68246595117">oldestXid</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p1348510165516">Xid</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p4467122775110">Oldest transaction ID for a node</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row584085614499"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p282545185111">xidVacLimit</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p748611616515">Xid</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p2467172715112">Critical point for forcing autovacuum.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row1884019567499"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p18257518515">oldestXidDB</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p1248610168513">OID</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p34671127145111">Database OID with the minimum <strong id="EN-US_TOPIC_0000001811491177__b154812291516">datafrozenxid</strong> under this node.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row684035611496"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p1882510585118">lastExtendCSNLogpage</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p12486816175112">Integer</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p546762715511">Page number of the last extension of csnlog.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row19328613145014"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p48251559514">startExtendCSNLogpage</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p0486101615515">Integer</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p15911578419">Starting page number of the csnlog extension.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row14628918135012"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p10825205105112">nextCommitSeqNo</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p7486191665110">Integer</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p94674271514">Next CSN to be generated under this node.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row4862724115015"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p7825355518">latestCompletedXid</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p048721619513">Xid</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p1046732711518">Latest transaction ID on the node after commit or rollback.</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001811491177__row143712033175017"><td class="cellrowborder" valign="top" width="22.6022602260226%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001811491177__p15825255519">startupMaxXid</p>
</td>
<td class="cellrowborder" valign="top" width="19.001900190019004%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001811491177__p18487151645110">Xid</p>
</td>
<td class="cellrowborder" valign="top" width="58.3958395839584%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001811491177__p17467122719517">Last transaction ID before the node shutdown.</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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