Re: How to reduce the overhead of WLM?

Classification: Confidential 1) reduce the number of service class periods and service classes 2) reduce the numberf of workloads 3) set CICS MAXTASKS to a reasonable number 4) Since this is a development system, set your major subsystems to velocity goals, not transaction goals (IMS, CICS, DB2,

Re: How to reduce the overhead of WLM?

If you are running a lot of CICS regions, you might want to look at reducing the mastask values, my understanding is that WLM create's PB for every possible active task in CICS and they get scanned every 250 ms too. On Mon, Mar 4, 2024 at 10:15 PM Jim Mulder wrote: > The most important thing i

Re: How to reduce the overhead of WLM?

Classification: Confidential Agreed! -Original Message- From: IBM Mainframe Discussion List On Behalf Of Anthony Hirst Sent: Tuesday, March 5, 2024 7:18 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: How to reduce the overhead of WLM? [CAUTION: This Email is from outside the Organizatio

Re: How to reduce the overhead of WLM?

Would it help to have more of those address spaces in SYSSTC so that WLM doesn't try to manage them? -- Tom Marchant On Tue, 5 Mar 2024 01:03:27 +, Graham Harris wrote: >A few years back, I did a deep dive into tuning CPU usage across a >multitude of very small z/OS guests under z/VM, and

Re: TELNET PROFILE, strictly PDS?

W dniu 04.03.2024 o 20:29, Wendell Lovewell pisze: As Allan said, you can compress an in-use PDS using IEBCOPY. //CMPEXEC PGM=IEBCOPY //SYSPRINT DD SYSOUT=* //SYSUT3 DD UNIT=SYSDA,SPACE=(CYL,(90)) //SYSUT4 DD UNIT=SYSDA,SPACE=(CYL,(90)) //INDD0DD DISP=SHR,DSN=&YOURPDS //SYSIN

Re: 35th International Rexx Symposium in Birsbane (Australia) about to start

Not every paradigm has a name, and not every use of a name has the same definition. When I'm using a specific language I use the nomenclature for that language; in a more general context, all bets are off. You have a similar situation in Mathematics, where texts typically start with the nomencl

Re: TELNET PROFILE, strictly PDS?

Thanks for all the comments from everyone. They were useful, relevant, and confirmed what I guessed. I built a new PDS/E Library and planned to pick it up as each LPAR was IPLed. In the end, the Compress while in use was enough. The free space should last until after I retire, again. This group i

Re: How to reduce the overhead of WLM?

Classification: Confidential The most important resource in most shops is CPU and is usually the critical factor in WLM adjustments. Judicious user of SC period and IMPortance is far more effective in controlling the distribution of CPU. . I would not overload SYSSTC with work, this will prevent

Re: How to reduce the overhead of WLM?

In this case the OP stated that they are PAYING for CPU cycles on a mostly idle machine, so to me the implication is that they wish to reduce their CPU cost by reducing idle CPU cycles. From: IBM Mainframe Discussion List On Behalf Of Allan Staller Sent: Tuesday, March 5, 2024 1:23 PM To: IBM-

Re: EXTERNAL EMAIL: Re: How to reduce the overhead of WLM?

During the hullabaloo of the Y2K testing period I had a dedicated CEC for Y2K testing so we could change the dates as necessary. I ran that box for a considerable time using SYSTEM, SYSSTC and everything else got placed in Discretionary. This worked just fine for a development/testing environmen

Re: How to reduce the overhead of WLM?

Thanks for your advice everyone. Graham: The 250ms interval seems to me to be the crux of the problem. I was hoping for a way to adjust it. We don't have all that many "user work" address spaces started. Usually only one CICS region. Jim: I've set RMPTTOM to 45000. Going from 3000 to 15000

IBM Announces the z/OS Container Platform

I’d like to draw your attention to this IBM announcement: https://www.ibm.com/docs/en/announcements/zos-container-platform-delivers-industry-standard-cloud-technologies-build-run-zos-unix-applications-as-containers-natively-zos

Re: ZOS Sending Logs to Sumologic Experience?

I don't understand this at all... we all know that SMF is not a log, it's a whole bunch of strings & mostly numbers... metrics. Why has it become acceptable to send metrics to a log search tool, knowing full well that these are different categories with different solutions. Splunk etc. are meant

WLM - service class and Dispatch priority

Hello I must confess that I am not a WLM expert but I just wanted to understand how this works In our environment we have few started where their Service class(Velocity) and Dispatch priority keeps changing on its own. Based on what constraint or definition in WLM the service class and Dispatch

BASE64 Decode / EPOCH Conversion Code Samples

Hello Folks. Is anyone aware of where one might locate any sample assembler code, macros or APIs to perform the following: - Base64 Decoding (to EBCDIC)- EPOCH Conversion Thanks in advance for the assistance.   Frank. -- For IBM-

Re: BASE64 Decode / EPOCH Conversion Code Samples

Base64 has nothing to do with EBCDIC. It is a means of converting binary data to commonly printable characters (typically A-Z a-z 0-9 + /) that can then be shipped in a non-binary manner. A simple duck-duck-go search will show examples. My first C program was a base 64 converter. On Wed, 6 Mar