Yep, under VM. And yep, I know about CPU inaccuracties...have/had the same problem with VSE and CICS for decades.
But if VM says a machine is using 50%.... And in that machine, TOP says some process is the major user... Then, you look at that process. Don't need fancy tools for that. But if the fancy tools then say, this process is using xx service, to reduce the cost of this service, tune yy, then it's a good deal. I assume that there is some sort of Oracle performance monitor and Websphere performance monitor to say what is actually going on. But from the Linux perspective, just what would it tell me? Just weighing the decision....money for Oracle performance tools, vs money for Linux performance tools.. If money was no object, I would get the VM performance, Linux performance, TCP/IP performance, Oracle performance, Websphere performance tools. But in real life, I will have to rank them. The bottom ones may get cut out. I would rather wait to see where the performance problems hit with the new workloads, but what makes it in the Capital budget, doesn't come out of our Operational budget later. Tom Duerbusch THD Consulting >>> [EMAIL PROTECTED] 02/01/05 1:03 PM >>> <Assumption> You are running under VM </Assumption> You may want to search the archives for some of Barton Robinson's very detailed messages regarding how top,vmstat,etc provide inaccurate (sometimes VERY inaccurate) information when running under VM. We have been very happy with the ESAMON tools and what it tells us. It measures darn near everything you can measure, so when you need to look someplace you never looked before chances are you are measuring something.. Plus it normalizes the data to give you a more realistic view of the workload. ----------------------------------- Jeremy Warren Sr. Systems Programmer KB Toy Stores mailto:[EMAIL PROTECTED]@kbtoys.com Tom Duerbusch <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[email protected]> 02/01/2005 01:55 PM Please respond to Linux on 390 Port To: [email protected] cc: Subject: [LINUX-390] Linux performance items I know there are Linux performance measurement tools out there, some free, some at a cost. But a more basic item. Just what needs to be meaured? We may be increasing our Linux workload greatly. We have been using Linux (Suse) for about 3 years now. So far, I've been satisified with what I get from VMSTAT and TOP. Of course, we haven't had many problems and when we have had problems, they were not tramatic. Now, we may be moving to mission critical. The real work is going to be done in Oracle and some in Websphere. It seems to me that once you set them up properly in z/Linux, the monitoring and measurement must be done within those applications. So, what do I need to know in the Linux machine when 98+% of the work within that machine is caused by a single "big" application (Oracle or Websphere)? Tom Duerbusch THD Consulting ---------------------------------------------------------------------- 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
