Database server address space

In the document "Database developers guide" is written the following:
"Most significantly, from the point of view of performance, you should note that only PL/SQL and Java methods run within the address space of the server. C/C++ methods are dispatched as external procedures, and run on the server machine but outside the address space of the database server. "
what does it mean - "the address space of the server" ?

Hi,
Its means that it will use free space available in the Memory (i.e., not within the SGA).
Memory = Oracle used Memory (SGA + PGA) + OS Process Memory + Other Running process Memory + Free Memory.
This C/C++ programs will use the free memory.
Regards,
Soumyajit

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    2) Because our JDBC entry only contains VIP1 and VIP2 hostname, does it normal that the application can resolve the NODE2 ipaddress? ( we look on all application's configuration files, we are sure that application does not have knowledge of node1/node2 ip address or hostname)No it's not. It should use the vip until release 11.1 and on release 11.2 the scan
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    4) I read about VIP address that it will be mapped to the other node's MAC when the node fail, could this happen because VIP misconfiguration?We have to check that. Get the nodeapps config (ask trhe dba the output off "srvctl config nodeapps -n <nodename> -a" ) for all nodes and check if the client machine is resolving the name to the right IP address. (good start I guess).
    Regards,
    Cerreia

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