docs/upgrading/upgrade_3_1_sysmem.html


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        <p>Library Version 12.1.6.1</p>
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      <p>Using the <a href="../api_reference/C/envopen.html#envopen_DB_SYSTEM_MEM" class="olink">DB_SYSTEM_MEM</a> option on UNIX systems now requires the
specification of a base system memory segment ID, using the
<a href="../api_reference/C/envset_shm_key.html" class="olink">DB_ENV-&gt;set_shm_key()</a> method.  Any valid segment ID may be specified, for
example, one returned by the UNIX <code class="literal">ftok</code>(3) function.</p>
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