Re: SMF41 VLF info and ALERTAGE
I agree that the main object of the HC was to alert for an over-threshold situation. But 'logging' in HC by VERBOSE YES is not an elegant way. That is what SMF was invented for: log information for the sake of logging it, just because it might be needed (weeks/months) later. I will wait what the answer in the PMR will be, maybe they direct me to the correct route. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Peter Relson Sent: 16 March, 2016 13:38 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE >why tell HC and not me? It did tell you. By the check messages. The main thought was that the important situation to tell you about was when trimming is happening too much. Thus the health check exception message is the right way to tell you. You can use the VERBOSE(YES) option of the health check to request showing of the information for all the classes, not just those that are in exception. Further, even previous health check information remains available through the logstream. So some of the rationale for "needing" it in SMF is a bit weak. >I already opened a PMR for adding the info to SMF 41-3. A PMR is not the right vehicle these days for requesting new function. Given that RFE is available, I would not bet that IBM level 2 will convert PMR's to RFE's any longer. They might, I just don't know. Peter Relson z/OS Core Technology Design -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
>why tell HC and not me? It did tell you. By the check messages. The main thought was that the important situation to tell you about was when trimming is happening too much. Thus the health check exception message is the right way to tell you. You can use the VERBOSE(YES) option of the health check to request showing of the information for all the classes, not just those that are in exception. Further, even previous health check information remains available through the logstream. So some of the rationale for "needing" it in SMF is a bit weak. >I already opened a PMR for adding the info to SMF 41-3. A PMR is not the right vehicle these days for requesting new function. Given that RFE is available, I would not bet that IBM level 2 will convert PMR's to RFE's any longer. They might, I just don't know. Peter Relson z/OS Core Technology Design -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
Yes, I was asked to open an RFE for this. So everybody who wants the new VLF tuning info in SMF 41-3, vote for RFE 85541: Update VLF's SMF41-3 with the new info of youngest trimmed object. Thanks, Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Vernooij, CP (ITOPT1) - KLM Sent: 16 March, 2016 14:43 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE I agree that the main object of the HC was to alert for an over-threshold situation. But 'logging' in HC by VERBOSE YES is not an elegant way. That is what SMF was invented for: log information for the sake of logging it, just because it might be needed (weeks/months) later. I will wait what the answer in the PMR will be, maybe they direct me to the correct route. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Peter Relson Sent: 16 March, 2016 13:38 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE >why tell HC and not me? It did tell you. By the check messages. The main thought was that the important situation to tell you about was when trimming is happening too much. Thus the health check exception message is the right way to tell you. You can use the VERBOSE(YES) option of the health check to request showing of the information for all the classes, not just those that are in exception. Further, even previous health check information remains available through the logstream. So some of the rationale for "needing" it in SMF is a bit weak. >I already opened a PMR for adding the info to SMF 41-3. A PMR is not the right vehicle these days for requesting new function. Given that RFE is available, I would not bet that IBM level 2 will convert PMR's to RFE's any longer. They might, I just don't know. Peter Relson z/OS Core Technology Design -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
It is relatively unlikely that we would implement this in the service stream. Not impossible. The information is nice, but it is obtainable via HC as I mentioned and customers have not thought it overly necessary since it seems that no one ever asked for it. We implemented it to help our service team. Peter Relson z/OS Core Technology Design -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
Vernooij, CP (ITOPT1) - KLM wrote: >I have V2.1, I think the HC functionality and the new age info became >available at V2.1, so I would like to see an upgrade for V2.1. Thanks, this is more or less what I see in the Knowledge pages. We are on z/OS v2.1 (only a handful of LPARs on z/OS v1.13). I'm asking because I only see COFVLH01I and no values (trimmed from what value in COFVLFxx? My COFVLFxx does not have any ALERTAGE). H, time to do serious RTFM... Seemed everything is in order with COFVLH01I, but I would like to see the VALUES - before trim and after trim. Groete / Greetings Elardus Engelbrecht -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
I have V2.1, I think the HC functionality and the new age info became available at V2.1, so I would like to see an upgrade for V2.1. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Elardus Engelbrecht Sent: 16 March, 2016 10:37 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE Vernooij, CP (ITOPT1) - KLM wrote: >Yes, I understood that and meant 'its HC routine'. I wanted to jump in, but ... Question - at what z/OS level do you want that SMF 41-3 record changed? Just curious if you don't mind please. Groete / Greetings Elardus Engelbrecht -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
Vernooij, CP (ITOPT1) - KLM wrote: >Yes, I understood that and meant 'its HC routine'. I wanted to jump in, but ... Question - at what z/OS level do you want that SMF 41-3 record changed? Just curious if you don't mind please. Groete / Greetings Elardus Engelbrecht -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
Yes, I understood that and meant 'its HC routine'. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Tom Marchant Sent: 15 March, 2016 17:38 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE On Tue, 15 Mar 2016 15:16:21 +, Vernooij, CP (ITOPT1) - KLM wrote: >I meant, VLF knows the current youngest age and makes it available to >the HC routine at each HC interva... ITYM "VLF knows the current youngest age and uses it in *its* health check". -- Tom Marchant -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
On Tue, 15 Mar 2016 15:16:21 +, Vernooij, CP (ITOPT1) - KLM wrote: >I meant, VLF knows the current youngest age and makes it available to >the HC routine at each HC interva... ITYM "VLF knows the current youngest age and uses it in *its* health check". -- Tom Marchant -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
Ok, I misunderstood the HC infrastructure. I meant, VLF knows the current youngest age and makes it available to the HC routine at each HC interval, which is volatile and is lost if the HC does not alert, but not to me at each SMF41 interval. I hope they will change this. As Peter more or less suggested: they forgot to do it. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Tom Marchant Sent: 15 March, 2016 15:33 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE On Tue, 15 Mar 2016 12:29:11 +, Vernooij, CP (ITOPT1) - KLM wrote: >I already guessed HC got the value from VLF internals, Well, not exactly. Health Checker establishes the infrastructure for doing health checks. System components then register their health check with HC, which invokes the routine that the component registered to perform the check. That component's check routine performs the check and uses the HC infrastructure to report on the results of the check in a common way. > so my immediate reaction was: why tell HC and not me? The check routine does tell you. With a health check message. >I already opened a PMR for adding the info to SMF 41-3. Good luck with that. Maybe they'll convert it to an RFE. -- Tom Marchant -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
On Tue, 15 Mar 2016 12:29:11 +, Vernooij, CP (ITOPT1) - KLM wrote: >I already guessed HC got the value from VLF internals, Well, not exactly. Health Checker establishes the infrastructure for doing health checks. System components then register their health check with HC, which invokes the routine that the component registered to perform the check. That component's check routine performs the check and uses the HC infrastructure to report on the results of the check in a common way. > so my immediate reaction was: why tell HC and not me? The check routine does tell you. With a health check message. >I already opened a PMR for adding the info to SMF 41-3. Good luck with that. Maybe they'll convert it to an RFE. -- Tom Marchant -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
Peter, Thanks for the info. I already guessed HC got the value from VLF internals, so my immediate reaction was: why tell HC and not me? I already opened a PMR for adding the info to SMF 41-3. Kees. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Peter Relson Sent: 15 March, 2016 13:07 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: SMF41 VLF info and ALERTAGE >Where does HC get this info from? I'd say that "HC" does not get the info from anywhere. This is a VLF health check, so VLF gets the information from its own control structures. VLF knows when it cached something and when it trimmed it (i.e., chose to remove the item from its cache for space reason). Thus it knows the "age" of the item that is trimmed and can compare that to the AlertAge. >This is useful information for adjusting the size of the VLF cache, >but why is this value not made available in VLF's SMF 41-3? Because no one has asked for that to be done (and we didn't think about it when considering implementing the health check). That certainly seems like a good thing to consider. Feel free to open an RFE to request it. For example, perhaps what you would want in the SMF record for each VLF class is: -- the class's AlertAge -- the class's current minimum age (when the minimum age is less than the AlertAge, the check flags this as an exception) Peter Relson z/OS Core Technology -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
Re: SMF41 VLF info and ALERTAGE
>Where does HC get this info from? I'd say that "HC" does not get the info from anywhere. This is a VLF health check, so VLF gets the information from its own control structures. VLF knows when it cached something and when it trimmed it (i.e., chose to remove the item from its cache for space reason). Thus it knows the "age" of the item that is trimmed and can compare that to the AlertAge. >This is useful information for adjusting the size of the VLF cache, >but why is this value not made available in VLF's SMF 41-3? Because no one has asked for that to be done (and we didn't think about it when considering implementing the health check). That certainly seems like a good thing to consider. Feel free to open an RFE to request it. For example, perhaps what you would want in the SMF record for each VLF class is: -- the class's AlertAge -- the class's current minimum age (when the minimum age is less than the AlertAge, the check flags this as an exception) Peter Relson z/OS Core Technology -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
SMF41 VLF info and ALERTAGE
Hello, Healthcheck VLF_MAXVIRT is informing us, that the VLF has trimmed objects younger than ALERTAGE specified in COFVLFxx. It also display the age of the youngest trimmed object. Where does HC get this info from? This is useful information for adjusting the size of the VLF cache, but why is this value not made available in VLF's SMF 41-3? Kees. For information, services and offers, please visit our web site: http://www.klm.com. This e-mail and any attachment may contain confidential and privileged material intended for the addressee only. If you are not the addressee, you are notified that no part of the e-mail or any attachment may be disclosed, copied or distributed, and that any other action related to this e-mail or attachment is strictly prohibited, and may be unlawful. If you have received this e-mail by error, please notify the sender immediately by return e-mail, and delete this message. Koninklijke Luchtvaart Maatschappij NV (KLM), its subsidiaries and/or its employees shall not be liable for the incorrect or incomplete transmission of this e-mail or any attachments, nor responsible for any delay in receipt. Koninklijke Luchtvaart Maatschappij N.V. (also known as KLM Royal Dutch Airlines) is registered in Amstelveen, The Netherlands, with registered number 33014286 -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
