<p></p>
<blockquote>
<p dir="auto">Oh and (sorry) one last question and then I think I'm really done... is the <code class="notranslate">num_threads</code> option in <code class="notranslate">renderd.conf</code> required, or if it's omitted will it "do the right thing" and use all available cores? The build process for the tiles machine is in ansible/packer, etc. and isn't ever serving tiles live -- so it'd be nice if I could just omit that configuration value and it'll figure out how to set itself up properly if I change instance types to something with less/more vCPUs</p>
</blockquote>
<p dir="auto">No, it defaults to <code class="notranslate">NUM_THREADS</code> (see <a href="https://github.com/openstreetmap/mod_tile/blob/4143ab23bd7d26028e3f3101e25fc00233f4a967/includes/render_config.h#L103">here</a>), although that might be a good idea for a pull request.</p>

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