There is more and more happening in the world of visualization and visualizing Oracle performance specifically with v$active_session_history.
Of these visualizations, the one pushing the envelope the most is Marcin Przepiorowski. Marcin is responsible for writing S-ASH , ie Simulated ASH versions 2.1,2.2 and 2.3. See
Here are some examples of what I have seen happening out there in the web with these visualizations grouped by the visualization tool.
The first example is using Gephi. The coolest example of Gephi I’ve seen is Greg Rahn’s analysis of the voting for Oracle World mix sessions.
Here is Marcin’s example using Gephi with ASH data:
Click on the examples to go to the actual HTML and not just the image. On the actual page from Marcin you can double click on nodes to make them the center of the network.
TOP 5 SQL_ID, SESSIONS and PROGRAMS joined together with additional joins to points not included in top 5. ex. TOP 5 SQL ID with list of sessions and programs TOP 5 SESSIONS with list of sql_id’s and programs TOP 5 PROGAMS with list of sessions and sql id’s
Frits Hoogland gives a great blog entry on getting started with R and then using R to analyze 10046 tracefiles (sort of ASH on steroids)
Here from Greg Rahn again is one of the cooler examples of R. In this case it’s the ASH data of a parallel query execution showing the activity of the different processes:
Here is an example basically reproducing the Top Activity screen with highcharts, a sqlscript on v$session and a cgi script to feed the data to the web page:
OEM 12c shows the new face of Enterprise Manager with the load maps
(quick apex example: http://ba6.us/node/132)