Does solaris command 'pmap -S pid' provide accurate number of the JVM heap size for the process?

Hi there,  I was trying to find out the actual runtime JVM heap size of a weblogic managed server instance:

 

Here is the configuration:

 

MEM_ARGS="-Xms256m -Xmx768m"

 

MEM_MAX_PERM_SIZE="-XX:PermSize=128m -XX:MaxPermSize=192m"

 

the managed server instance processes, however, if we do

 

'pmap -x' against the managed server instance process id, we found that the   

 

total Kb    is  about 4 GB

 

I don't think that this is accurate,  because if I look the garbage collection log file, it shows that 

the maximum heap size is :  2.6 GB

 

6196.837: [GC

Desired survivor size 40108032 bytes, new threshold 1 (max 15)