Already did that:

 

q srm                                              

IABIAS : INTENSITY=90%; DURATION=3                 

LDUBUF : Q1=300% Q2=200% Q3=150%                   

STORBUF: Q1=300% Q2=200% Q3=150%                   

DSPBUF : Q1=32767 Q2=32767 Q3=32767                

DISPATCHING MINOR TIMESLICE = 5 MS                 

MAXWSS : LIMIT=9999%                               

...... : PAGES=999999                              

XSTORE : 0%                                        

 

From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf 
Of Helmuth Teubl
Sent: Tuesday, December 21, 2010 10:06 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Strange response time problems (also posted on VSE-L)

 

Hi,
maybe SRM-Settings not OK? You should overcommit LDUBUFs and STORBUFs
The defaults are:
CP Q SRM 
IABIAS : INTENSITY=90%; DURATION=2 
LDUBUF : Q1=100% Q2=75% Q3=60% 
STORBUF: Q1=125% Q2=105% Q3=95% 
DSPBUF : Q1=32767 Q2=32767 Q3=32767 
DISPATCHING MINOR TIMESLICE = 5 MS 
MAXWSS : LIMIT=9999% 
...... : PAGES=999999 
XSTORE : 0% 
LIMITHARD METHOD: DEADLINE 

Have a look, maybe try following settings:
q srm 
IABIAS : INTENSITY=90%; DURATION=2 
LDUBUF : Q1=300% Q2=200% Q3=100% 
STORBUF: Q1=300% Q2=275% Q3=250% 
DSPBUF : Q1=32767 Q2=32767 Q3=32767 
DISPATCHING MINOR TIMESLICE = 5 MS 
MAXWSS : LIMIT=9999% 
...... : PAGES=999999 
XSTORE : 0% 
LIMITHARD METHOD: DEADLINE 

kind regards
Helmuth 


Inactive hide details for David.Wakser---21.12.2010 15:54:15---All: We are 
running 2 2.3 VSE systems under z/VM 5.4 on a Z800 David.Wakser---21.12.2010 
15:54:15---All: We are running 2 2.3 VSE systems under z/VM 5.4 on a Z800 CPU.



Von:


david.wak...@infocrossing.com



An:


IBMVM@LISTSERV.UARK.EDU



Datum:


21.12.2010 15:54



Betreff:


Strange response time problems (also posted on VSE-L)



Gesendet von:


IBMVM@LISTSERV.UARK.EDU

________________________________




All: 

We are running 2 2.3 VSE systems under z/VM 5.4 on a Z800 CPU. We are 
experiencing periods of time when VSEs do not respond at all (e.g. cannot get 
in via FAQS from CMS, etc.), even though nothing is running in the VSE system 
and the z/VM system is not very busy. At other times, we have excellent 
response times, though conditions on either the guests or the z/VM host didn’t 
seem to change. 

We do not have any z/VM monitors (except Explore, which is not set up 
properly), and we have even tried QUICKDSP, without success. 

Is anyone aware of any PTFs that address this strange behavior? We believe it 
started when the system was upgraded to z/VM 5.4. 

David Wakser 

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