-MULTIPLIER"><span class="term"><code class="varname">hash_mem_multiplier</code> (<code class="type">floating point</code>)
      <a id="id-1.6.7.7.2.2.7.1.3" class="indexterm"></a>
      </span> <a href="#GUC-HASH-MEM-MULTIPLIER" class="id_link">#</a></dt><dd><p>
        Used to compute the maximum amount of memory that hash-based
        operations can use.  The final limit is determined by
        multiplying <code class="varname">work_mem</code> by
        <code class="varname">hash_mem_multiplier</code