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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Oracle shadow process
Tim,
Thanks a lot. That was good explanation. Now, all the
numbers add up.
Thanks again
Sonia P.
--- "Johnston, Tim" <TJohnston_at_quallaby.com> wrote:
> The problem is that top reports the ENTIRE shared
> memory segment in EVERY
> process... For example... If your shared memory
> segment is 300M and top
> reports memory usage of 320-340M per process... You
> are in reality using
> about 20-40M of private memory in each process and
> 300M of shared memory...
> But, shared memory is only allocated once...
>
> i.e.
>
> Shared memory segment of 300M
>
> top reports shared memory private
> usage by process
> process1 320M 300M
> 20M
> process2 330M 300M
> 30M
> process3 320M 300M
> 20M
> process4 340M 300M
> 40M
>
> So... Your total memory usage is...
>
> 20M + 30M + 20M + 40M + 300M = 410M
>
> Not...
>
> 320M + 330M + 320M + 340M = 1310M
>
> Does that help explain it?
>
> Tim
>
> -----Original Message-----
> Sent: Wednesday, January 30, 2002 4:45 PM
> To: Multiple recipients of list ORACLE-L
>
>
> I am sorry I did not specify the os. We are using
> solaris 2.8 and We are using top utility to look at
> the oracle user process. As far as I know, ipcs -ma
> will give me the size of the entire memory segment.
> I
> am trying to find the values for each user
> connection..
>
> Thanks
> Sonia P.
>
>
>
> Unix I assume? How are you determining the memory
> usage? Many unix
> utilities can be misleading (i.e top) and report the
> shared memory segment
> in each process... Check ipcs -ma to see the size
> of
> the shared memory
> segment...
>
> HTH
> Tim
>
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> Author: sonia pajerowski
> INET: spajerowski_at_yahoo.com
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: sonia pajerowski INET: spajerowski_at_yahoo.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Wed Jan 30 2002 - 21:16:30 CST
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