Hi,
Welcome to EMC Support Forum.

For Flare 26, Navisphere requires JRE 5.0 update 6 (1.5.0_06) at a minimum. However, for performance reason it is recommended to use JRE 6.

Refer to the "EMC Navisphere Manager Release Notes - version 6.26.2 for FLARE OE 03.26.yyy and 02.26.yyy" for more details.

Here are some important inputs -

To increase the performance of Navisphere Manager and the JRE, run Navisphere Manager using Java 6. This JRE has significant performance improvements from Java 5.
Additionally, use this Java runtime switch to increase the memory available to the JRE
¿Xmx512m

For optimal UI performance, EMC recommends that the memory limit allocated to the JRE be increased. The default size of 64 MB is often too small and may result in Out of memory errors.
To set the memory size, from the Start menu in Windows, select Settings > Control Panel. Double-click the Java Plugin icon. Select the Advanced tab. In the Java Runtime Parameters, enter the following:
¿Xmx512m
The argument specifies the maximum memory.
Typically, about 1/2 the size of your overall workstation's memory is recommended as the maximum memory value. For instance, if your workstation has 1 GB of memory, then use -Xmx512m for the JRE runtime parameter. If your workstation has 2 GB or more memory, you can adjust the max JRE memory as needed to avoid running out of Java memory and possibly improving overall performance.

Hope this helps.
Thanks,
Sandip

Hi,

Does my previous post answer your query? If so, request you to kindly mark the question answered by selecting the post as Correct or Helpful.

Please revert back if you need any more details.

Thanks,
Sandip