Thanks Allen, that is good place to start. The CPU% for the ISGLOCK, IXCSTR1
and IXCSTR2 are 58%, 74% and 21%, which seem very high to me. But, the IXCSTR3
and IXCSTR4 are very low. It would seem I might have an imbalance with the XCF
messages and size. Async rate for IXCSTR1 is 120
I am wondering if I need to adjust my CLASSDEF CLASSLEN size for each of the
structures. We are running ICFs on GP, with one virtual connection to each
ICFA/B. Not ideal, but all I could do at the moment.
/* TRANSPORT CLASSES. */
CLASSDEF CLASS(SML) CLASSLEN(956) GROUP(UNDESIG)
CLASSDEF CLASS(MED) CLASSLEN(8000)
CLASSDEF CLASS(DEFAULT) CLASSLEN(16316)
CLASSDEF CLASS(BIG) CLASSLEN(32000)
/* XCF STRUCTURES */
PATHOUT STRNAME(IXCSTR1) CLASS(SML)
PATHOUT STRNAME(IXCSTR2) CLASS(MED)
PATHOUT STRNAME(IXCSTR3) CLASS(BIG)
PATHOUT STRNAME(IXCSTR4) CLASS(DEFAULT)
/* */
PATHIN STRNAME(IXCSTR1,IXCSTR2,IXCSTR3,IXCSTR4)
Also, we have:
FUNCTIONS ENABLE(DUPLEXCF16, SYSSTATDETECT, CRITICALPAGING)
Thanks Jerry
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of
Allan Staller
Sent: Friday, May 1, 2020 2:32 PM
To: [email protected]
Subject: Re: z/OS performance question
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The only tuning I a aware of for XCF is to provide appropriate transport
classes for the messages being passed. If inappropriate, this will usually
show up as CPU concumption in the XCFAS address space. Look at the CPU
consumed, not the delay.
It is possible that this is contributing to the CICS delays. GRS will use XCF
if available.
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of
Edgington, Jerry
Sent: Friday, May 1, 2020 12:30 PM
To: [email protected]
Subject: z/OS performance question
[CAUTION: This Email is from outside the Organization. Unless you trust the
sender, Don’t click links or open attachments as it may be a Phishing email,
which can steal your Information and compromise your Computer.]
To anyone,
I am not a performance person at all, but can someone help me with pointing me
in the right direction. We are running a small SYSplex, but we are getting
delays on one LPAR, PROC-XCFAS
*SYSTEM PROC-XCFAS 3.7 users
ALL STC PROC-XCFAS 3.2 users
IMS PROC-XCFAS 26.0 % delay
RMF PROC-XCFAS 18.0 % delay
RMFGAT PROC-XCFAS 21.0 % delay
IMSCTL PROC-XCFAS 25.0 % delay
TN3270 PROC-XCFAS 28.0 % delay
VTAM PROC-XCFAS 19.0 % delay
Also, we are ACF2 shop and our production CICS regions are getting delays:
ENQ -ACFVSAM 38.0 % delay LOGONIDS
ENQ -ACF2ACB 100.0 % delay LOGONIDS
So any help would be great.
Thanks,
Jerry Edgington
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