Improving Performance

You can improve performance in many areas by taking a few steps in advance. For example, creating indexes can greatly speed up queries and save back.

The following table lists some of the steps you can take to improve performance. For more information on an item, click the link.

Feature Layers
Filtering a Feature Layer	You can filter a feature layer to reduce the number of features in the layer and improve performace. You can filter data as you bring it into your map (in Data Connect, click Add To Map With Query), or after you bring it in (right-click the layer and choose Query To Filter Data).

Query Attached Drawings
Removing an Assigned Coordinate System	Using the AutoCAD Map 3D toolset global coordinate systems requires many complex calculations and can decrease performance for operations such as querying objects from attached drawings and saving back objects.
Creating an Index	To reduce the amount of time it takes to perform a query, create an index. Instead of searching all locations, properties, object data, or database links to find matching data, AutoCAD Map 3D toolset searches only the relevant index. If you created indexes in a previous release of AutoCAD Map 3D toolset, it may help to recreate the indexes in this release to ensure that they include any new features, such as color book names.

Raster Images
Hiding a Raster Image	When you hide an image, the image does not display onscreen, nor does it plot. Only the image boundary displays onscreen. Hiding images is a convenient way to speed regeneration time. You can easily redisplay the image when you are ready to plot.
Unloading an Image	To conserve memory use and enhance performance, you can unload images that you do not currently need to view and/or plot.
Configuring Memory Use	Because memory management can be an issue when working with large images, you can configure the Raster Extension for best performance. Specify the amount of memory reserved for the image swap file. The higher the Memory Limit, the less swapping to hard disk occurs and the faster your images load and display. For best performance, use a local drive for your temporary swap file.
Changing the Image Display Quality	Display your images in high quality or draft quality. High quality dithers the pixels so that the areas between shading appear more gradual. Draft quality can speed up the performance of your system, but may reduce the quality of how some color and gray scale images appear onscreen.

Topology
Buffering a Topology	Improve the performance of buffering operations by increasing the RAM to more than the recommended amount, or by increasing the virtual memory on your system. This is recommended if you are buffering large topologies.

DataView
Viewing Selected Records Using an SQL Filter	Filter, or limit, the data displayed in the Data View. Filters let you view only the records you want. This can improve performance in scrolling through many records or in highlighting records.

Other
Erase Short Objects	Using the Erase Short Objects cleanup action, you can locate any objects shorter than the specified tolerance and erase them. This action reduces the number of unnecessary linear objects and nodes in a map.
Simplify Objects	Simplifying linear objects reduces file size and improves performance but also reduces the resolution of the data.
Using EditSets and Locking	When modifying or working with a large number of objects, you can enhance performance by adding the objects to the EditSet (locking them) prior to working with them.