My guess is that Oracle runs a few processes using shared memory. The script just totals all the procs, shared or not, so shared memory applications will definitely skew the results.
Ray > -----Original Message----- > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > Behalf Of Tom Duerbusch > Sent: Friday, July 23, 2010 6:05 PM > To: LINUX-390@VM.MARIST.EDU > Subject: Re: Reducing Linux virtual machine size > > Hi Ray. > > I tried your script on some of my images. Works fine, except > when Oracle is involved. > > linux62:~ # ps -eo pmem | awk '{pmem += $1};END {print "pmem > ="pmem"%"}'; > pmem =1347.1% > I do have a lot of swap blocks allocated. This is due to a > batch type run, that is run off hours. During the day, when > users are on, we swap very little. > > So if this does include swap pages, I don't think the script > would give me what I need, during normal processing. Do you > agree? Or am off track here? > > Thanks > > Tom Duerbusch > THD Consulting > > >>> "Mrohs, Ray" <ray.mr...@usdoj.gov> 7/23/2010 1:45 PM >>> > Start up all your Linux procs and then run this little script. > > #! /bin/sh > ps -eo pmem | awk '{pmem += $1}; END {print "pmem = "pmem"%"}'; > > It will give you a ballpark percentage of current memory utilization. > I tuned some Apache/ftp servers down to 100M with no ill effects. > > Ray Mrohs > U.S. Department of Justice > 202-307-6896 > > > > > > > -----Original Message----- > > From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On > > Behalf Of Bruce Furber > > Sent: Friday, July 23, 2010 11:01 AM > > To: LINUX-390@VM.MARIST.EDU > > Subject: Reducing Linux virtual machine size > > > > Can someone recommend a how to procedure for monitoring a > > zLinux machine to determine how much to reduce a machines > > virtual memory? > > > > Getting permission to schedule time to log a machines off is > > very difficult so I have to be confident I have it right. > > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to lists...@vm.marist.edu with the message: INFO > > LINUX-390 or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > ---------------------------------------------------------------------- > > For more information on Linux on System z, visit > > http://wiki.linuxvm.org/ > > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO > LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to lists...@vm.marist.edu with the message: INFO > LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
