Oracle Solaris System Administration (MOSC)

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prstat -a interpretation

edited Feb 13, 2016 10:15AM in Oracle Solaris System Administration (MOSC) 1 commentAnswered

Hi,

We have a M9000 running Solaris 10 supporting Oracle DB with Sun cluster. The server has 48GB of memory. Below is the extracted output of "prstat -a" for oracle ID:

#prstat -a

   :

NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU                            

  2710      oracle             44G      33G    68%        882:14:16 6.7%

There are 2 DB running:

1 st DB:

SGA: 10GB

PGA: 8GB

% Host mem used: 38

2 nd DB:

SGA: 2GB

PGA: 0.2GB

% Host mem used: 4

(A) Total % Host mem used = 38 + 4 = 42

Please advise why there is a difference of 26% (68% (indicated in "prstat -a" output) - 42% (indicated in (A)) = 26) memory usage by oracle ID?

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