Techniques for tracking, profiling and recognizing attributes associated with transactions associated with computer system services. A bitmap representation of the unique identifiers created from name-value pairs of attributes is created and one or more operations are performed on the representation to process the bitmap representation. The one or more operations include operations to, for example, compress the bitmap representation, sub-sample the bitmap representation, locate patterns of attributes within the bitmap representation and other such processing operations. The processed bitmaps may then be further queried to analyze the event data.