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SMF Type 99 Record (Subtype 7) - z/OS 1.13

This table shows the record layout for type 99 SMF records
(System Resource Manager (SRM) Decisions - z/OS 1.13).

List of other SMF record layouts available.
List of sample SMF reports.

Purpose: This record type is written by the SRM component. The records contain:

  • Performance data for each service class period
  • Trace codes representing the SRM actions
  • The data which SRM used to decide which actions to take
  • The controls SRM is using to manage work.

In addition, subtypes 1 and 9 will be written by the SRM component when running in compatibility mode.

Record 99 has the following subtypes:

Subtype 1 Contains system level data, the trace of SRM actions, and data about resource groups. The SRM actions are recorded in trace codes. All trace codes are described in z/OS MVS Programming: Workload Management Services. A subtype 1 record is written every policy interval.

Subtype 2 Contains data for service classes. A subtype 2 record is written every policy interval for each service class if any period in the service class had recent activity.

Subtype 3 Contains service class period plot data. A subtype 3 record is written every policy interval for each service class if any period in the service class had recent activity and plot data.

Subtype 4 Contains information about a device cluster. A device cluster is a set of service classes that compete to use the same non-paging DASD devices. A subtype 4 record is written every policy interval for each device cluster in the system.

Subtype 5 Contains data about monitored address spaces. A subtype 5 record is written each policy interval for each swapped in monitored address space.

Subtype 6 Contains summary information about each service class period, including the resource control settings for the next policy interval. A subtype 6 record is written each policy interval.

Subtype 7 Contains summary information for the Enterprise Storage Server (ESS) with Parallel Access Volume (PAV) feature. A subtype 7 record is written every third policy interval.

Subtype 8 Contains summary information for LPAR CPU management. A subtype 8 record is written each policy interval, when in LPAR mode.

Subtype 9 Contains summary information for dynamic channel path management. A subtype 9 record is written each policy interval.

Subtype 10 Contains information about dynamic processor speed changes. A subtype 10 record is written for every processor speed change.

Subtype 11 Contains information about Group Capacity Limits. A subtype 11 record is written every 5 minutes.

Subtype 12 Contains information about HiperDispatch. This information is for IBM internal use only.

Subtype 13 Contains information about HiperDispatch. This information is for IBM internal use only.

Subtype 14 Contains information about HiperDispatch. This information is for IBM internal use only.

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SMF Type 99 Record -- System Resource Manager (SRM) Decisions - z/OS 1.13
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF99S7_
LEN
2binary
Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word). See “Standard SMF Record Header” on page 13-1 for a detailed description.
22SMF99S7_
SEG
2binary
Segment descriptor (see record length field).
44SMF99S7_
FLG
1binary
System indicator: Bit Meaning When Set 0-2 Reserved 3-6 Version indicators* 7 Reserved.*See “Standard SMF Record Header” on page 13-1 for a detailed description.
55SMF99S7_
RTY
1binary
Record type 99
66SMF99S7_
TME
4binary
Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
100ASMF99S7_
DTE
4packed
Date when the record was moved into the SMF buffer, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
140ESMF99S7_
SID
4EBCDIC
System identification (from the SID parameter).
1812SMF99S7_
SSID
4EBCDIC
Sub system identification
2216SMF99S7_
TID
2binary
Record subtype (must be at offset X'16' x).
2418SMF99S7_
SDEF_
LEN
4binary
Length of the self definition section.
Self-Defining Section
(Offset from beginning of record: 28)
00SMF99S7_
POF
4binary
Offset to the product section from the beginning of the record (including RDW).
44SMF99S7_
PLN
2binary
Length of the product section.
66SMF99S7_
PON
2binary
Number of the product section.
88SMF99S7_
DOF
4binary
Offset to data section from beginning of the record (including RDW).
12CSMF99S7_
DLN
2binary
Length of the data section.
14ESMF99S7_
DON
2binary
Number of the data section.
SMF 99 Product Information
(Offset from beginning of record: SMF99S7_POF)
00SMF99S7_
VN2
2binary
Record sub-version. Use to identify changes to the record in the service stream.
22SMF99S7_
RVN
2binary
Record version number.
44SMF99S7_
PNM
8EBCDIC
Product name - SRM
12CSMF99S7_
SLV
8EBCDIC
System level from which record was cut (Copied from CVTPRODN).
2014SMF99S7_
SNM
8EBCDIC
System name from which record was cut (Copied from CVTSNAME)
281CSMF99S7_
PFLG
1binary
Record Flags: Bit Meaning When Set 0 Only a subset of the available data was written to avoid that this record gets larger than 32 KByte 1 Only a subset of the available data is written to this record. The rest follows in subsequent records. This record contains a reassembly area. 2–7 Reserved.
291D--3EBCDIC
Reserved.
Subtype 7 - Self Defining Section
(Offset from beginning of record: SMF99S7_DOF)
00SMF997_
PAV_
SUBSYS_
ID
32EBCDIC
PAV subsystem ID, (NED TOKEN)
3220SMF997_
NUM_
EXT_
SC
4binary
Number of external service classes. This is needed to determine the index to the SYSTEM service class in the device service class bitmap. The device service class bitmap is in the device data section. The number of external service classes is put in the self-defining section to avoid repeating it for each device.
3624SMF997_
PAV_
DATA_
DEV_
OF
4binary
Offset to the first device section, from beginning of record (including RDW).
4028SMF997_
PAV_
DATA_
DEV_
LEN
2binary
Length of each device section.
3826SMF997_
PAV_
DATA_
DEV_
NO
2binary
Number of device sections.
Subtype 7 - PAV Device Section
(Offset from beginning of record: SMF997_PAV_DATA_DEV_OF)
00SMF997_
PAV_
DEV_
ID
2binary
Device ID.
22SMF997_
PAV_
DEV_
FLAGS
1binary
Goal type: Bit Meaning When Set 0 PAV device is an unbound alias 1 PAV device managed by WLM 2 PAV device temporarily unavailable 3–7 Reserved
33SMF997_
PAV_
DEV_
NUM_
OF_
ALIASES
1binary
Number of aliases assigned. Valid for PAV base device.
44SMF997_
PAV_
DEV_
AVG_
IOS_
QUEUE_
LEN
4binary
Average IOS queue length. Valid for PAV base device.
88SMF997_
PAV_
DEV_
AVG_
SERVICE_
TIME
4binary
Average service time. Valid for PAV base device in 128 micro seconds.
12CSMF997_
PAV_
DEV_
IODELAY_
TIME
4binary
I/O Delay Time. Currently CU queue time.
1610SMF997_
PAV_
DEV_
IODELAY_
SAMPS
2binary
I/O Delay samples
1812SMF997_
PAV_
DEV_
IOSQSAMPLES
2binary
IOS Queue samples
2014--4binary
Reserved
2418SMF997_
PAV_
DEV_
DEVSC_
MAP_
OLD
14binary
Device service class ID bit string for 108 service classes prior to z/OS V1R10
3826--2binary
Reserved
4028SMF997_
PAV_
DEV_
UTILIZATION
4binary
Utilization
442CSMF997_
PAV_
DEV_
PENDTIME
4binary
Pend time
4830SMF997_
PAV_
DEV_
DISCTIME
4binary
Disconnect time
5234SMF997_
PAV_
DEV_
SSC
4binary
Start subchannel count
5638SMF997_
PAV_
DEV_
MINACNT
1binary
Local min alias count
5739SMF997_
PAV_
DEV_
GMINACNT
1binary
Global min alias count
583A--2binary
reserved
603CSMF997_
PAV_
DEV_
RSRVD2
8binary
Reserved
6844--4binary
Reserved
7248SMF997_
PAV_
DEV_
DEVSC_
MAP
46binary
Device service class ID bit string

The table above is based on the description provided by IBM in its "MVS Systems Management Facilities (SMF)" manual.

Copyright 2017.
Pacific Systems Group.
All rights reserved.


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