docs - update when pg_class.relfrozenxid is 0 (zero) (#5767)

* docs - update when pg_class.relfrozenxid is 0 (zero) * docs - update relfrozenxid info. Update - XID values start at 3 (0, 1, 2 are special IDs).

docs - update when pg_class.relfrozenxid is 0 (zero) (#5767)
* docs - update when pg_class.relfrozenxid is 0 (zero) * docs - update relfrozenxid info. Update - XID values start at 3 (0, 1, 2 are special IDs).
18809d14 · Mel Kiyama · David Yozie · 88510fc7 · 18809d14 · 18809d14
Showing with 7 addition and 7 deletion

gpdb-doc/dita/admin_guide/intro/mvcc_example.xml gpdb-doc/dita/admin_guide/intro/mvcc_example.xml +1 -1

gpdb-doc/dita/ref_guide/system_catalogs/pg_class.xml gpdb-doc/dita/ref_guide/system_catalogs/pg_class.xml +6 -6

未找到文件。
--- a/gpdb-doc/dita/admin_guide/intro/mvcc_example.xml
+++ b/gpdb-doc/dita/admin_guide/intro/mvcc_example.xml
@@ -6,7 +6,7 @@
   <body>
      <p>For Greenplum Database, the transaction ID (XID) value an incrementing 32-bit
            (2<sup>32</sup>) value. The maximum unsigned 32-bit value is 4,294,967,295, or about
-         four billion. The XID values restart at 0 after the maximum is reached. Greenplum Database
+         four billion. The XID values restart at 3 after the maximum is reached. Greenplum Database
         handles the limit of XID values with two features:<ul id="ul_nlb_ks5_vv">
            <li>Calculations on XID values using modulo-2<sup>32</sup> arithmetic that allow
               Greenplum Database to reuse XID values. The modulo calculations determine the order

--- a/gpdb-doc/dita/ref_guide/system_catalogs/pg_class.xml
+++ b/gpdb-doc/dita/ref_guide/system_catalogs/pg_class.xml
@@ -132,8 +132,7 @@
            </entry>
            <entry colname="col2">oid</entry>
            <entry colname="col3"/>
-            <entry colname="col4">Deprecated <ph>in Greenplum Database
-              3.4</ph>.</entry>
+            <entry colname="col4">Deprecated <ph>in Greenplum Database 3.4</ph>.</entry>
          </row>
          <row>
            <entry colname="col1">
@@ -141,8 +140,7 @@
            </entry>
            <entry colname="col2">oid</entry>
            <entry colname="col3"/>
-            <entry colname="col4">Deprecated<ph> in Greenplum Database
-              3.4</ph>.</entry>
+            <entry colname="col4">Deprecated<ph> in Greenplum Database 3.4</ph>.</entry>
          </row>
          <row>
            <entry colname="col1">
@@ -277,8 +275,10 @@
            <entry colname="col4">All transaction IDs before this one have been replaced with a
              permanent (frozen) transaction ID in this table. This is used to track whether the
              table needs to be vacuumed in order to prevent transaction ID wraparound or to allow
-              pg_clog to be shrunk. Zero (<codeph>InvalidTransactionId</codeph>) if the relation is
-              not a table.</entry>
+                <codeph>pg_clog</codeph> to be shrunk. <p>The value is <codeph>0</codeph>
+                  (<codeph>InvalidTransactionId</codeph>) if the relation is not a table or if the
+                table does not require vacuuming to prevent transaction ID wraparound. The table
+                still might require vacuuming to reclaim disk space.</p></entry>
          </row>
          <row>
            <entry colname="col1">