 individual backend process.  On platforms where
        <span class="productname">PostgreSQL</span> can determine the kernel limit,
        the server will not allow this variable to be set to an unsafe
        value.  However, not all platforms provide the information,
        so caution is recommended in selecting a value.
       </p></dd><dt id="GUC-SHARED-MEMORY-TYPE"><span class="term"><code class="varname">shared_memory_type</code> (<code class="type">enum</code>)
      <a id="id-1.6.7.7.2.2.13.1.3" 