Question Regarding WRKSYSSTS Screen - % temp addresses

[David L. White]

I had a client ask today what is the significance of the '% temp
addresses' field on the upper left part of the screen on a WRKSYSSTS
command.

The 'help' key gave some details, but did not answer the question -
What happens when this field approaches 100%. (It currently is at
81.501%).

Does it warp, explode, nothing, perform an IPL, or what ?

Any thoughts from anyone.

Thanks in advance
--
Dave White
Virtual Technology Associates, Inc.
Richmond, VA
Voice: (804) 364-0108 FAX: (804) 364-1788
email: 75701...@compuserve.com
vir...@aol.com -or- vir...@i2020.net

[nAkEd dAvE]

David L. White wrote:
>
> I had a client ask today what is the significance of the '% temp
> addresses' field on the upper left part of the screen on a WRKSYSSTS
> command.
>
> The 'help' key gave some details, but did not answer the question -
> What happens when this field approaches 100%. (It currently is at
> 81.501%).
>
> Does it warp, explode, nothing, perform an IPL, or what ?
>
>

I know the earlier releases (before 3.1) would crash at 100%. Not sure
about 3.1 and up.

You can clear the temp addresses by performing an IPL. (which you have
to do after the crash anyway).

I believe there is a small performance degredation as the % goes up -
caused by the system having to search for open addresses.

[Julian H. Lloyd]

David L. White wrote:
>
> I had a client ask today what is the significance of the '% temp
> addresses' field on the upper left part of the screen on a WRKSYSSTS
> command.
>
> The 'help' key gave some details, but did not answer the question -
> What happens when this field approaches 100%. (It currently is at
> 81.501%).
>
> Does it warp, explode, nothing, perform an IPL, or what ?

<SNIP>

An IPL is required to regenerate the temporary addresses. I haven't
experienced what happens when you use them all up, but I imagine the
system would crash fairly speedily as temporary addresses are needed to
create process access groups (among other things), so neither you nor
the system could start any new jobs. I understand that the problem
effectively goes away when you move to RISC, due to the larger address.
For more details, see Frank Soltis' book, "Inside the AS/400" pp. 200 -
201.

Regards,

JHL

[John Vriezen]

In article <53h0ld$7...@news.i2020.net>, vir...@i2020.net says...

>
>I had a client ask today what is the significance of the '% temp
>addresses' field on the upper left part of the screen on a WRKSYSSTS
>command.
>
>The 'help' key gave some details, but did not answer the question -
>What happens when this field approaches 100%. (It currently is at
>81.501%).
>
>Does it warp, explode, nothing, perform an IPL, or what ?
>

>Any thoughts from anyone.
>
>Thanks in advance
>--
>Dave White
>Virtual Technology Associates, Inc.
>Richmond, VA
>Voice: (804) 364-0108 FAX: (804) 364-1788
>email: 75701...@compuserve.com
> vir...@aol.com -or- vir...@i2020.net
>
>

The system will probably crash when it reaches 100%, although it may be more
graceful than that.. You should IPL soon, at least before you reach 100%

John Vriezen
jvri...@attmail.com
STRATEGY Essbase/400 Development
ShowCase Corporation

[David Dunfield]

David L. White wrote:
>
> I had a client ask today what is the significance of the '% temp
> addresses' field on the upper left part of the screen on a WRKSYSSTS
> command.
>
> The 'help' key gave some details, but did not answer the question -
> What happens when this field approaches 100%. (It currently is at
> 81.501%).
>
> Does it warp, explode, nothing, perform an IPL, or what ?
>
> Any thoughts from anyone.
>
> Thanks in advance
> --
> Dave White
> Virtual Technology Associates, Inc.
> Richmond, VA
> Voice: (804) 364-0108 FAX: (804) 364-1788
> email: 75701...@compuserve.com
> vir...@aol.com -or- vir...@i2020.net

Temp address used to be a big deal. I think now it is of less concern.
If your client re-ipls the temp address % should drop.

[John Vriezen]

In article <53hreg$5...@pike.ntnet.nt.ca>, xcde...@ssimicro.com says...

>
>vir...@i2020.net (David L. White) wrote:
>
>>I had a client ask today what is the significance of the '% temp
>>addresses' field on the upper left part of the screen on a WRKSYSSTS
>>command.
>
>>The 'help' key gave some details, but did not answer the question -
>>What happens when this field approaches 100%. (It currently is at
>>81.501%).
>
>>Does it warp, explode, nothing, perform an IPL, or what ?
>
>>Any thoughts from anyone.
>
>>Thanks in advance
>>--
>>Dave White
>>Virtual Technology Associates, Inc.
>>Richmond, VA
>>Voice: (804) 364-0108 FAX: (804) 364-1788
>>email: 75701...@compuserve.com
>> vir...@aol.com -or- vir...@i2020.net
>
>

>ALthough I don't totally understand the reason why, I have always been
>told that these temp addresses should be kept relatively low (under
>10%) and to accomplish that, an IPL should be done on a regular basis.
>
>
>Cd
>
There is no reason this needs to be kept under 10%, but you don't want to risk
running out, or you will have an unexpected system outage. The system won't
run any slower or less efficiently. However, just like most computer's, an
occasionaly IPL will "clean" things up that may not get cleaned up any other
way--

[Chris de Orla]

[willsher]

>An IPL is required to regenerate the temporary addresses. I haven't
>experienced what happens when you use them all up, but I imagine the
>system would crash fairly speedily as temporary addresses are needed to
>create process access groups (among other things), so neither you nor
>the system could start any new jobs. I understand that the problem
>effectively goes away when you move to RISC, due to the larger address.
>For more details, see Frank Soltis' book, "Inside the AS/400" pp. 200 -
>201.

I think you're right. We are running a variety of machines, and the
temporary addresses on the RISC machine have hardly varied at all
since we first switched them on (0.6%). The CISC machines used to get
IPLd when the temporary addresses exceeded 25%.

Jim Willsher

"There's two lanes running down this road, and whichever side you're on...
Accounts for where you want to go, or what you're running from..."

Jim Willsher <will...@sol.co.uk>

[ScLind]

I had heard years ago from our IBM rep that the temp addresses should be
kept under 10%. I once worked at a software development shop that ran so
many jobs each day (compiles, etc) that we needed to IPL every night.

I advocate a weekly IPL. I understand there is a cycle of cleanup
activities that get performed in a round-robin fashion with each IPL. So
you can be missing a lot of good operating system cleanup by not IPL'ing.

[Walden Leverich]

On Wed, 09 Oct 1996 20:08:59 GMT, vir...@i2020.net (David L. White)
wrote:

>What happens when this field approaches 100%. (It currently is at

>81.501%).
>
>Does it warp, explode, nothing, perform an IPL, or what ?

Crash is the correct answer. Have your client do an IPL and the %
temporary addresses should fall to the floor. If it doesn't have them
place a service call.

-Walden