cluster_name

doc html

<p>
        Sets a name that identifies this database cluster (instance) for
        various purposes.  The cluster name appears in the process title for
        all server processes in this cluster.  Moreover, it is the default
        application name for a standby connection (see <a class="xref" href="/docs/18/runtime-config-replication.html#GUC-SYNCHRONOUS-STANDBY-NAMES">synchronous_standby_names</a>).
       </p><p>
        The name can be any string of less
        than <code class="symbol">NAMEDATALEN</code> characters (64 characters in a standard
        build). Only printable ASCII characters may be used in the
        <code class="varname">cluster_name</code> value.
        Other characters are replaced with <a class="link" href="/docs/18/sql-syntax-lexical.html#SQL-SYNTAX-STRINGS-ESCAPE" title="4.1.2.2. String Constants with C-Style Escapes">C-style hexadecimal escapes</a>.
        No name is shown if this parameter is set to the empty string
        <code class="literal">''</code> (which is the default).
        This parameter can only be set at server start.
       </p>

documentation revision

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