Update docs/source/maps.rst
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@ -69,6 +69,24 @@ The Data section is where you can connect your map layers to their Data Sources
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.. image:: images/PostGIS-Select.png
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Layer Cache
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When you connect your map to a PostGIS Data Source, you have the option of caching layers for better performance.
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By default, cache is disabled.
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You can enable caching on a per Layer basis by specifying the cache interval.
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When set, this is the interval at which your map will check the database for updates.
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.. image:: images/cache.png
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If you have enabled cache and wish to clear it, you can do so by clicking the Clear Cache icon on the Map page:
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.. image:: images/clear-cache.png
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QGIS Project File:
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--------------
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