<p><b>@pnorman</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/openstreetmap/mod_tile/pull/152#pullrequestreview-15634958">includes/render_config.h</a>:</p>
<pre style='color:#555'>>  #ifdef METATILE
 #define QUEUE_MAX (64)
 #define REQ_LIMIT (32)
-#define DIRTY_LIMIT (1000)
-
+#define DIRTY_LIMIT (216000)
+#define HASHIDX_SIZE (477856)
</pre>
<p>Why is a higher HASHIDX_SIZE needed for with metatiles?</p>

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