DBVisualizer: The JVM could not be started. The maximum heap size (-Xmx) might be to large or an antivirus or firewall tool could block the execution

If you the the folloging error:

"The JVM could not be started. The maximum heap size (-Xmx) might be to large or an antivirus or firewall tool could block the execution"

Modify the -Xmx value in the dbvis.vmoptions file located in the installation directory for DbVisualizer as follows.

-Xmx512m

or

-Xmx1024m

Save the file and restart DbVisualizer.

Resource:
http://www.dbvis.com/forum/thread.jspa?messageID=10472