Database Administration (MOSC)

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PGA Use

edited Aug 8, 2011 4:33AM in Database Administration (MOSC) 5 commentsAnswered
Hi experts.

We are running an 11g instance in a HP PA-RISC server, 96Gb in RAM. As the operation starts and more processes are in execution, the memory usage in the server raises to 95%. The total SGA + PGA used, reported by dictionary views, is  about 28Gb.

When I see the unix processes with the top command, they show about 8Gb to 12Gb of memory usage (each one), for the few active processes at the top.

My question is: How to see the real memory usage of the overall oracle process? Why the memory usage reported by UNIX and Oracle are so different viewing the same process / session???

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