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SMF Type 99 Record (Subtype 6) - 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
00SMF99S6_
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.
22SMF99S6_
SEG
2binary
Segment descriptor (see record length field).
44SMF99S6_
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.
55SMF99S6_
RTY
1binary
Record type 99
66SMF99S6_
TME
4binary
Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
100ASMF99S6_
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.
140ESMF99S6_
SID
4EBCDIC
System identification (from the SID parameter).
1812SMF99S6_
SSID
4EBCDIC
Sub system identification
2216SMF99S6_
TID
2binary
Record subtype (must be at offset X'16' x).
2418SMF99S6_
SDEF_
LEN
4binary
Length of the self definition section.
Self-Defining Section
(Offset from beginning of record: 28)
00SMF99S6_
POF
4binary
Offset to the product section from the beginning of the record (including RDW).
44SMF99S6_
PLN
2binary
Length of the product section.
66SMF99S6_
PON
2binary
Number of the product section.
88SMF99S6_
DOF
4binary
Offset to data section from beginning of the record (including RDW).
12CSMF99S6_
DLN
2binary
Length of the data section.
14ESMF99S6_
DON
2binary
Number of the data section.
SMF 99 Product Information
(Offset from beginning of record: SMF99S6_POF)
00SMF99S6_
VN2
2binary
Record sub-version. Use to identify changes to the record in the service stream.
22SMF99S6_
RVN
2binary
Record version number.
44SMF99S6_
PNM
8EBCDIC
Product name - SRM
12CSMF99S6_
SLV
8EBCDIC
System level from which record was cut (Copied from CVTPRODN).
2014SMF99S6_
SNM
8EBCDIC
System name from which record was cut (Copied from CVTSNAME)
281CSMF99S6_
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 6 - Self Defining Section
(Offset from beginning of record: SMF99S6_DOF)
00SMF996CPOF4binary
Offset to service class period section.
44SMF996CPLN2binary
Length of a service class period section.
66SMF996CPON2binary
Number of service class period sections.
Subtype 6 - Period Data Section
(Offset from beginning of record: SMF996CPOF)
00SMF996_
ECLASS_
NAME
8EBCDIC
External class name. For an externally-defined service class, this is a name defined in the service definition. For a server period, this name will of the form . For system service classes, this name will be , , , , or .
88SMF996_
PER_
NUM
2binary
Period number within class.
10ASMF996_
GOALTYPE
1binary
Goal type: Value Meaning 0 System, SYSSTC, or server goal 1 Short response time 2 Long response time 3 Velocity 4 Discretionary
11BSMF996_
PERCENTILE
1binary
Response time goal percentile. (Zero if period does not have a percentile response time goal.)
12CSMF996_
ICLASS_
NAME
8EBCDIC
Internal service class name. Same as SMF996_ECLASS_NAME, except for discretionary periods, in which case the name will be of the form .
2014SMF996_
GOALVAL
4binary
Goal value. If a response time goal, this value will be the goal in milliseconds. If a velocity goal, this value will be the velocity percentage. If a discretionary goal, system goal, or if this is a server period, this value will be zero.
2418SMF996_
IMPOR
2binary
Importance of service class period.
261ASMF996_
DP
1binary
Dispatching priority of period for next policy interval.
271BSMF996_
IODP
1binary
I/O priority of period for next policy interval.
281CSMF996_
MPLI
2binary
MPL in-target for next policy interval.
301ESMF996_
MPLO
2binary
MPL out-target for next policy interval.
3220SMF996_
RUA
4binary
Average number of ready address spaces over last policy interval, scaled by a factor of 16.
3624SMF996_
PSPT
4binary
Time swapped out address spaces in period are protected from being swapped to aux for next policy interval. This value is expressed in units of 1.024 milliseconds.
4028SMF996_
PSITAR
4binary
Storage isolation target for next policy interval for each address space in period. (Valid only for work with short response time goals, in which case the value is the number of frames protected. Otherwise, this value is zero.)
442CSMF996_
LOCAL_
PI
4binary
Local performance index, times 100.
4830SMF996_
SYSPLEX_
PI
4binary
Sysplex performance index, times 100.
5234SMF996_
SERVER_
DATA_
OF
4binary
Offset to server section from beginning of record (including RDW). Only valid if period is a server period. There will be one server section entry for each different external service class to which server address spaces in this server period were originally classified.
5638SMF996_
SERVER_
DATA_
LN
2binary
Length of each server section entry.
583ASMF996_
SERVER_
DATA_
ON
2binary
Number of server section entries.
603CSMF996_
PSERV
4binary
Service accumulated during interval.
6440SMF996_
PISERV
4binary
zAAP service accumulated during interval.
6844SMF996_
PSSERV
4binary
Accumulated SUP service.
7248SMF996_
Time_
at_
PDP_
Using
4binary
Time at PDP using samples during last interval.
764CSMF996_
Time_
at_
PDP
4binary
Time at PDP accumulator during last interval.
8050SMF996_
FLAGS
1binary
Flags. Bit Meaning When Set
0 Period is managed by EWLM performance data.
1–7 Reserved.
8151--3EBCDIC
Reserved.
8454SMF996_
EWLM_
LOCAL_
PI
4binary
EWLM local PI.
8858SMF996_
EWLM_
GLOBAL_
PI
4binary
EWLM global PI.
Subtype 6 - Server Section
(Offset from beginning of record: SMF996_SERVER_DATA_OF)
00SMF99_
S6_
SERVER_
CLASS_
NAME
8EBCDIC
Name of the service class to which at least one of the server address spaces in the server period represented by the subtype 6 entry was originally classified.
88SMF99_
S6_
SERVER_
PER_
NUM
4binary
Period number within class.

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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