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nmon - new online Physical CPU Graphs arrive for latest AIX 6.1
I have just upgraded my EMEA Power Systems Advanced Technical Support internal Wiki Apache Web-server to the very latest AIX level, which is AIX 6.1 Technology Level 6 Service Pack 5 or AIX6.1TL6sp5 for short! Then I noticed that the nmon at this AIX level has been updated - I worked the code for the internal prototype of this new feature some time ago and it has arrived in the official topas/nmon code at this release - C O O L . The latest release AIX 7.1 service pack has this new options too. The problem: As the numbers of CPU goes up with... [More]
Marcações: power6 power7 tl06 6.1 sp5 aix monitoring topas nmon physical cpu |
nmon - Do we have a serious problem .... or not!
I am working with a larger Power 7 customer and learning lots about life in the large and professional computer room. Oh Gosh!!! My Power Virtual Machine (Logical Partition) is totally busy. Oh Heck!!! Look at all that System time, we have a serious problem!! Or do we? Take a look at the below nmon stats and make up your own mind before scrolling down. Actually, we are in offices many miles away from most of the Power 7 computers because the machines are
split across three sites. More than twenty Power 7 Model 795's is
enough to... [More]
Marcações: tl06 time aix system power performance tl05 nmon |
nmon - I can't see all the CPUs on-screen. Please Help!
Here is another question from that larger Power 7 machine customer. They have large Virtual Machines (Logical Partitions) and can't see all the CPUs on the screen. This is made worst by Power 7 machines - not a problem with the processors or machines but there are: So many CPUs on larger machines like Power 770/780 and the mighty Power 795 Then the new Simultaneous Multi-Threading (SMT) now means four threads per physical CPU (core). This means lots of physical CPUs and each has four logical CPUs. So what happens on the screen - you see a... [More]
Marcações: nmon longer physical cpu power powervm aix term |
nmon for AIX - 15 years on and still learning
I have been running the nmon ( n igel's mon itor) for AIX project for 15 years now but I am still learning. I initially wrote it to help me run AIX 3.2 then AIX 4 benchmarks on RS/6000 machines as running the older "down the screen" and "line by line" tools like vmstat and iostat was driving me mad (literally making my eye hurt) and so using screen curses enabled the number to stop moving on the screen. nmon's second most important feature was to make graphing the results simpler as a graph includes the time dimension, it... [More]
Marcações: nmon aix weighted power analyzer average analyser |
Raspberry Pi & Thoughts on Game Changing Technology
It was my birthday on Saturday and by pure luck my Raspberry Pi was delivered the day before - what a great day "hacking" (in the old sense of the word). I have been waiting for a few months for this delivery - What a treat!! If you have not heard of this credit size computer before here is the back ground. The Problem In the UK, school information technology education has been pitifully reduced to Microsoft Word, Excel and Powerpoint. My own kids came home badly depressed as they started the classes as they knew far more than the... [More]
Marcações: ams nweb aix power7 ame power amd wpar nmon aixpert itm isd rbac raspberry ssd ganglia dlpar pi charm ssp |
It's good when it goes wrong and I am on holiday (nmon question peaks)
I have never really understood why I get peaks and troughs in nmon questions and urgent situations but July seems to be a peak and fortunately I was not at work for a large part of it. Performance and nmon Questions trend to come in three flavours: really dumb, genuine and mega-urgent critical lets blame the hardware. Let me give you a flavour of each type of question from the last month. Perhaps, reading these will let you avoid the same problem or at least let you learn "you are not alone". Really dumb "nmon has stopped... [More]
Marcações: cpu service analyser packs aix nmon nmon2rrd nmon2web power7 firmware |
nmon Analyser Version 3.4 = Just Released, Get Your Copy Today
Stephen Atkins (the Guru behind the nmon Analyser) has released a new version - two days ago. This includes loads of improvements and some new features. Best of all - less problems running on newer Excel releases (it works around inconsistencies with the Microsoft API). I have always said that at least 50% of the popularity of my nmon is down to the excellent Analyser graphs. Very few people regularly see the online screen view. Thanks again Steve, for all your many hours of hard work in your personal time on the behalf of the tens of... [More]
Marcações: 3.4 power7 nmon graphs linux analyser excel aix power performance |
AIX Memory Usage - or - Who is using the memory and how?
Common question: I see XX% of Used Memory but I don't know who is using it and how? A simple question but there is no simple answer as memory use if complex. nmon then hit "m" will quickly show you a few big uses of memory as below: The shared memory used by lots of applications like DB2 and Oracle - check the SEGSZ for the size. The Owner column usually tells you what it is used for like the oracle user for the SGA or db2inst1 for the DB2 buffer cache. Then it is down to the processes and this gets... [More]
Marcações: ipcs aix nmon power svmon memory ram use |
FAQ2: Analyzing Large Volumes of nmon Data
I regularly get asked a question like: I have 4 months of data from 25 machines and have to develop a Capacity Planning model to size these LPARs on to new machines but I am having problems with having so much data. What can you recommend? We need graphs of CPU compared to Entitlement CPU Physical CPU use Maximum real memory use Network MB/s Disk MB/s Disk IOPS Sometimes this data is needed as input in to the Workload Estimator tool or Server Consolidation tools. My standard response is: You now understand Performance Monitoring and... [More]
Marcações: rrdtool nmon2rrd planning analyser linux capacity nmon2web aix nmon |
