Although this thread focuses on tuning for Rush Hud almost all of these steps are applicable to the regular Hud as well.
Basic Rush Hud Troubleshooting:
You must be running the latest Beta. The current version is Beta 30.5.
Rush hands are not importing correctly:
1) Check your FullTilt Configuration
Rush Hud does not appear on my table:
1) Make sure you Check "Enable Rush Hud" in the Full Tilt Configuration under the Auto Import tab.
Rush Hud Performance Problems
1) Turn off the Full Tilt Memory Grabber. Full Tilt has made this functionality obsolete.
2) Upgrade PostgreSQL to version 8.3.9
3) This will require a reindex. Click the cache status button and check everything including Reindex.
4) Make sure your cache is up-to-date. The older your computer and the more tables you play the more important this becomes.
5) Tune your PostgreSQL to your computer. The defaults do not take advantage of your computer's power.
NOTE: We are no longer recommending and have never required a Rush-only database. This suggestion was only a troubleshooting step and reflecting the fact that all databases used need to be cached frequently. The whole cache issue is our top priority right now.