When using sqlContext.cacheTable() a registered table. the name of the RDD becomes a very large string (related to the query that created the sqlRDD). As a result the first columns of the storage tab in SparkUI becomes very long and the other columns become squashed.
Since the name of the RDD is not human readable, we can simply set ellipsis in the first cell (which will hide the rest of string). Alternatively we can fix the RDD name to a more readable and shorter name.