z/VM 5.3 and Redhat 5.1 Bobby Bauer Center for Information Technology National Institutes of Health Bethesda, MD 20892-5628 301-594-7474
-----Original Message----- From: Scott Rohling [mailto:[EMAIL PROTECTED] Sent: Friday, April 11, 2008 9:03 AM To: [email protected] Subject: Re: FW: Could use some help tuning a POC How about your z/VM levels (5.1, 5.3?) -- 5.3 contained some good performance enhancements that have been immediately obvious to some of my customers. Also - Linux -- what Linux distro and what level? Scott Rohling On Fri, Apr 11, 2008 at 6:33 AM, Bauer, Bobby (NIH/CIT) [E] < [EMAIL PROTECTED]> wrote: > Thanks Rich. Tried the vmnstat command and memory doesn't seem to be the > issue. I didn't think it was. I beat on the application for several > minutes and saw it swap in when I started and no other swap except for > one. > > > Bobby Bauer > Center for Information Technology > National Institutes of Health > Bethesda, MD 20892-5628 > 301-594-7474 > > > > -----Original Message----- > From: Rich Smrcina [mailto:[EMAIL PROTECTED] > Sent: Friday, April 11, 2008 8:18 AM > To: [email protected] > Subject: Re: FW: Could use some help tuning a POC > > One of the signs to knowing if Linux needs more memory is if Linux > itself is paging. > > While your application is running use the vmstat command: 'vmstat 15' > > It will show some paging metrics (among others) in 15 second intervals. > It will show up under the swap column. The first one line doesn't > count because that's an average since the system came up. Pay attention > to the rest though, while the app is running. > > If you see consistent high paging (swapping). You may want to bump up > the size of the virtual machine. > > Do you have Vdisk set up for Linux swap? If you do that's great, > because if Linux does need to swap it will do so very fast. > > Also, if the application demands more or runs out of memory, you'll > *usually* get messages indicating such (from Linux or the application) > or it may exhibit weird behavior. > > Bauer, Bobby (NIH/CIT) [E] wrote: > > This was posted to both the VM and Linux listservs > > > > We finally got our POF running this morning and response is not great. > > Since we know very little about this z/VM and zLinux I would > appreciate > > any hints. Performance Monitor shows some paging and swapping but from > > our MVS point of view, its now bad. The VM guest only has 512M. I > could > > increase it but I keep hearing from Share and other seminars that > > increasing memory is not usually the problem. There is 2G of memory > > assigned to this lpar. > > Some testers, at different geographical locations are getting good > > results, others aren't so I'm looking into network problems also. > > > > Detailed data for user LKTEST2 > > > > > > > > > > > > Total CPU : ....% Storage def. : 512MB Page fault > rate: > > ..../s > > > > > > > > > > Superv. CPU : ....% Resident <2GB: 129654 Page read rate > : > > ..../s > > > > > > > > > > Emulat. CPU : ....% Resident >2GB: 0 Page write > rate: > > ..../s > > > > > > > > > > VF total : ....% Proj. WSET : 131072 Pgs moved > >2GB>: > > ..../s > > > > > > > > > > VF overhead : ....% Reserved pgs : 0 Main > XSTORE > : > > ..../s > > > > > > > > > > VF emulation: ....% Locked pages : 13 XSTORE > main > : > > ..../s > > > > > > > > > > VF load rate: ..../s XSTORE dedic.: 0MB XSTORE > DASD > : > > ..../s > > > > > > > > > > I/O rate : ..../s XSTORE pages : 1314 SPOOL pg reads > : > > ..../s > > > > > > > > > > DASD IO rate: ..../s DASD slots : 0 SPOOL pg > writes: > > ..../s > > > > > > > > > > UR I/O rate : ..../s IUCV X-fer/s : ..../s MDC insert > rate: > > ..../s > > > > > > > > > > Diag. X'98' : ..../s Share : 100 MDC I/O > avoided: > > ..../s > > > > > > > > > > *BLOCKIO : ..../s Max. share : ... > > > > > > > > > > > > > > > > > > > > > > #I/O active : 0 Active :100% PSW wait :100% I/O > > act. : 0% > > > > > > > > > > Stacked blk : .. Page wait : 0% CF wait : 0% > > Eligible : 0% > > > > > > > > > > Stat.: EME,DSC,PSWT I/O wait : 0% Sim. wait: 0% > > Runnable : 0% > > > > > > > > > > > > > > > > > > > > Data Space Name Size Mode PgRd/s PgWr/s XRd/s XWr/s > Migr/s > > Steal/s > > > > > > > > > > BASE 512MB Priv ... ... ... ... > ... > > ... > > > > > > > > > > > > > > > > > > > > Device activity and status: > > > > > > > > > > 0009 3215 .0 000C 254R CL *, EOF > NOH > > NCNT > > > > > > > > Interval 07:45:21-07:46:23, on 2008/04/11 (CURRENT interval, select > > interim <http://128.231.160.20:81/035986D8/3FB6/interim> or average > > <http://128.231.160.20:81/035986D8/3FB6/average> data) > > > > > > > > > > ______ . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.M_TOTAL> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.%25MUSED> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.H_TOTAL> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.%25HUSED> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.SHARED> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM./CAFREE> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.USED> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.S_TOTAL> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.%25SUSED> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.IN> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.OUT> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.CATES> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.MAJOR> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.MINOR> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.READ> . > > <http://128.231.160.20:81/035986D8/3FB6/SO.LXMEM.WRITE> > > > > > > > > > > <------------ Memory Allocation (MB) -------------> > <------- > > Swapping -------> <--- Pages/s ---> <-BlockIO-> > > > > > > > > > > Linux <--- Main ---> <--- High ---> Buffers Cache <-Space > > (MB)-> <-Pgs/sec-> Allo <-Faults--> <--kB/sec-> Nr of > > > > > > > > > > Userid <http://128.231.160.20:81/035986D8/3FB6/HE.04.001> M_Total > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.011> %MUsed > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.019> H_Total > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.026> %HUsed > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.034> Shared > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.041> /CaFree > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.048> Used > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.057> S_Total > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.063> %SUsed > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.071> In > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.081> Out > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.086> cates > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.090> Major > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.096> Minor > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.102> Read > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.109> Write > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.114> Users > > <http://128.231.160.20:81/035986D8/3FB6/HE.04.120> > > > > > > > > > > >System< 499.4 89.2 .0 .0 .0 63.1 181.8 1344 > > 2.7 .000 .000 74.28 .062 174.1 5.329 5.958 3 > > > > > > > > > > LAMP1 <http://128.231.160.20:81/035986D8/3FB6/LXM.LAMP1> 499.4 > > 93.6 .0 .0 .0 95.6 178.3 1024 .0 .000 .000 > > 210.5 .000 503.1 .067 10.87 > > > > > > > > > > LKTEST1 <http://128.231.160.20:81/035986D8/3FB6/LXM.LKTEST1> > 499.4 > > 75.7 .0 .0 .0 89.5 192.2 1504 .0 .000 .000 > > .836 .000 .070 .000 2.648 > > > > > > > > > > LKTEST2 <http://128.231.160.20:81/035986D8/3FB6/LXM.LKTEST2> > 499.4 > > 98.2 .0 .0 .0 4.3 174.9 1504 8.2 .000 .000 > > 8.843 .182 12.94 15.60 4.231 > > > > Bobby Bauer > > Center for Information Technology > > National Institutes of Health > > Bethesda, MD 20892-5628 > > 301-594-7474 > > > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 > or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > > -- > Rich Smrcina > VM Assist, Inc. > Phone: 414-491-6001 > Ans Service: 360-715-2467 > rich.smrcina at vmassist.com > http://www.linkedin.com/in/richsmrcina > > Catch the WAVV! http://www.wavv.org > WAVV 2008 - Chattanooga - April 18-22, 2008 > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or > visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
