>.  The default value is
        2.0, which makes hash-based operations use twice the usual
        <code class="varname">work_mem</code> base amount.
       </p><p>
        Consider increasing <code class="varname">hash_mem_multiplier</code> in
        environments where spilling by query operations is a regular
        occurrence, especially when simply increasing
        <code class="varname">work_mem</code> results in memory pressure (memory
        pressure typically takes the form of intermittent out 