RE: *****SPAM***** prstat memory display on Solaris 10

  • From: "Powell, Mark D" <mark.powell@xxxxxxx>
  • To: "Oracle-L" <oracle-l@xxxxxxxxxxxxx>
  • Date: Fri, 15 Jun 2007 08:28:05 -0400

Many UNIX utilities cannot properly account for shared memory usage.
Since there are dozens to hundreds of Oracle processes on the system and
each of them accesses the SGA which is shared memory some shared memory
is being incorrectly counted as part of each process's memory by the
utility.
 

-- Mark D Powell -- 
Phone (313) 592-5148 

 


________________________________

        From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Binh Pham
        Sent: Thursday, June 14, 2007 3:59 PM
        To: 'Oracle-L'
        Subject: *****SPAM***** prstat memory display on Solaris 10
        
        

        When I issue the command "prstat -a", the memory displayed is
not explainable.  May be someone can help me with this.

         

        We know that the server has only 32Gigs of real memory and 20
Gigs of swap space.  Why does it display "oracle" is using 924G of
memory?

         

        Thanks.

         

         

        NPROC USERNAME  SIZE   RSS MEMORY      TIME  CPU


            90 root     1221M  377M   0.0%   3:46:46 6.3%

           177 oracle    924G  878G   100%   0:42:15 0.2%

            96 applmgr  2672M 1254M   0.1%   0:30:07 0.1%

             2 srsuser    15M   13M   0.0%   0:00:00 0.0%

             1 noaccess  190M   88M   0.0%   0:33:48 0.0%

             4 gharibia   12M 5816K   0.0%   0:00:00 0.0%

             4 meigu      13M 1928K   0.0%   0:00:02 0.0%

             3 gchao      11M   24K   0.0%   0:00:04 0.0%

             7 cdeleon    32M 6048K   0.0%   0:00:00 0.0%

             2 bpham    9840K 2576K   0.0%   0:00:04 0.0%

             1 smmsp    7744K 1520K   0.0%   0:00:04 0.0%

             1 nagios   3176K  616K   0.0%   0:00:34 0.0%

             6 daemon     22M 4928K   0.0%   0:04:26 0.0%

        Total: 394 processes, 933 lwps, load averages: 2.38, 2.41, 2.47 

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