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<h2 class="title" style="clear: both"><a id="set_shm_key_parameter"></a>set_shm_key</h2>
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<p>
Configures the database environment's base segment ID. This base segment ID will be used when Berkeley DB shared memory regions are first created.
It will be incremented a small integer value each time a new shared memory region is
created; that is, if the base ID is 35, the first shared memory region created will have a
segment ID of 35, and the next one will have a segment ID between 36 and 40 or so.
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See <a href="../../programmer_reference/env_region.html" class="olink">Shared Memory Regions</a> for more information.
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<p>The syntax of the entry in
<a href="../../bdb-sql/using_dbconfig.html#using_dbconfig.title" class="olink">the DB_CONFIG File</a> is a single line
with the string <code class="literal">set_shm_key</code> one or more whitespace characters, and the ID.
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<p>For more information, see <a class="xref" href="envset_shm_key.html" title="DbEnv::set_shm_key()">DbEnv::set_shm_key()</a>. </p>
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