Increase the ASDM Configuration Memory
ASDM supports a maximum configuration size of 512 KB. If you exceed this amount you may experience performance issues. For example, when you load the configuration, the status dialog box shows the percentage of the configuration that is complete, yet with large configurations it stops incrementing and appears to suspend operation, even though ASDM might still be processing the configuration. If this situation occurs, we recommend that you consider increasing the ASDM system heap memory.
Increasing the memory size of Cisco ASDM client to improve performance
Increase the ASDM Configuration Memory in WindowsTo increase the ASDM heap memory size, edit the run.bat file by performing the following procedure.
Step 1: Go to the ASDM installation directory, for example C:\Program Files (x86)\Cisco Systems\ASDM.
Step 2: Edit the run.bat file with any text editor.
Step 3: In the line that starts with “start javaw.exe”, change the argument prefixed with “-Xmx” to specify your desired heap size. For example, change it to -Xmx768M for 768 MB or -Xmx1G for 1 GB.
Step 4: Save the run.bat file.
Increase the ASDM Configuration Memory in Mac OSTo increase the ASDM heap memory size, edit the Info.plist file by performing the following procedure.
Step 1: Right-click the Cisco ASDM-IDM icon, and choose Show Package Contents.
Step 2: In the Contents folder, double-click the Info.plist file. If you have Developer tools installed, it opens in the Property List Editor. Otherwise, it opens in TextEdit.
Step 3: Under Java > VMOptions, change the string prefixed with “-Xmx” to specify your desired heap size. For example, change it to -Xmx768M for 768 MB or -Xmx1G for 1 GB.
Step 4: If this file is locked, you see an error such as the following:
Step 5: Click Unlock and save the file.
If you do not see the Unlock dialog box, exit the editor, right-click the Cisco ASDM-IDM icon, choose Copy Cisco ASDM-IDM, and paste it to a location where you have write permissions, such as the Desktop. Then change the heap size from this copy.