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SMF Type 99 Record - Subtype 9

This table shows the record layout for type 99 SMF records
(System Resource Manager (SRM) Decisions).

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.

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SMF Type 99 Record -- System Resource Manager (SRM) Decisions
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF99S9_
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.
22SMF99S9_
SEG
2binary
Segment descriptor (see record length field).
44SMF99S9_
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.
55SMF99S9_
RTY
1binary
Record type 99
66SMF99S9_
TME
4binary
Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
100ASMF99S9_
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.
140ESMF99S9_
SID
4EBCDIC
System identification (from the SID parameter).
1812SMF99S9_
SSID
4EBCDIC
Sub system identification
2216SMF99S9_
TID
2binary
Record subtype (must be at offset X'16' x).
2418SMF99S9_
SDEF_
LEN
4binary
Length of the self definition section.
Self-Defining Section
(Offset from beginning of record: 28)
00SMF99S9_
POF
4binary
Offset to the product section from the beginning of the record (including RDW).
44SMF99S9_
PLN
2binary
Length of the product section.
66SMF99S9_
PON
2binary
Number of the product section.
88SMF99S9_
DOF
4binary
Offset to data section from beginning of the record (including RDW).
12CSMF99S9_
DLN
2binary
Length of the data section.
14ESMF99S9_
DON
2binary
Number of the data section.
SMF 99 Product Information
(Offset from beginning of record: SMF99S9_POF)
00SMF99S9_
VN2
2binary
Record sub-version. Use to identify changes to the record in the service stream.
22SMF99S9_
RVN
2binary
Record version number.
44SMF99S9_
PNM
8EBCDIC
Product name - SRM
12CSMF99S9_
SLV
8EBCDIC
System level from which record was cut (Copied from CVTPRODN).
2014SMF99S9_
SNM
8EBCDIC
System name from which record was cut (Copied from CVTSNAME)
281CSMF99S9_
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 9 - Self Defining Section
(Offset from beginning of record: SMF99S9_DOF)
00SMF999_
IO_
SUBSYSTEM_
DATA_
OFFSET
4binary
Offset to IO Subsystem data section from beginning of record (including RDW)
44SMF999_
IO_
SUBSYSTEM_
DATA_
LENGTH
2binary
Length of IO Subsystem Data section
66SMF999_
IO_
SUBSYSTEM_
DATA_
NUMBER
2binary
Number of IO Subsytem Data sections
88SMF999_
IOSUB_
PLOT_
OF
4binary
Offset to IO Subsystem plots
12CSMF999_
IOSUB_
PLOT_
LN
2binary
Length of IO Subsystem plots
14ESMF999_
IOSUB_
PLOT_
ON
2binary
Number of IO Subsystem plots
1610SMF999_
CHANNEL_
DATA_
OF
4binary
Offset to Channel Data section
2014SMF999_
CHANNEL_
DATA_
LN
2binary
Length of Channel Data section
2216SMF999_
CHANNEL_
DATA_
ON
2binary
Number of Channel Data section
Subtype 9 - IO Subsystem Data Section
(Offset from beginning of record: SMF999_IO_SUBSYSTEM_DATA_OFFSET)
00SMF999_
FLAG1
1binary
IO subsystem flags Bit Meaning When Set 0 Indicates that the I/O subsystem is eligible for dynamic management. 1 Indicates CONFIG change has been made. 2 Indicates that no point was plotted this interval. If this indicator is on, SMF99_IOSUB_INTERVAL_VELOCITY is not relevant. 3 Indicates that no channel data was written this interval. This indicator is set when the structure for the channel data does not exist. 4 Indicates that while calculating the busy to connect ratio an entry ratio was converted from >1.6 to 1.3. 5-7 Reserved.
11SMF999_
CONTROL_
FLAGS
1binary
Control flags Bit Meaning When Set 0 Indicates that this SMF 99 subtype 9 record represents a situation that caused us not to create valid SMF 99 subtype 9 data. Identify the condition by checking one of the following indicators. Data in this SMF 99 subtype 9 is invalid other than possibly the SMF999_IOSUB_INDEX (valid when empty slot or old slot entry). 1 Indicates that registry data does not exist. 2 Indicates that the WLM LPAR Cluster structure is not connected. 3 Indicates that the SMF 99 buffer for the subtype 9 data was not processed from the previous interval. 4 Indicates empty slot entry. 5 Indicates old slot entry. 6 Indicates unknown reason. 7 Reserved.
22SMF999_
ROW_
INDEX
2binary
Channel path data row index
44--1EBCDIC
Reserved
55SMF999_
DIAG_
TOKEN
3binary
Internal diagnosis data
88SMF999_
TOKEN_
NED
32EBCDIC
Token NED of I/O subsystem
4028SMF999_
IOSUB_
TARGET_
VELOCITY
4binary
I/O subsystem target velocity set by WLM
442CSMF999_
IOSUB_
VELOCITY
4binary
The actual I/O velocity of the subsystem
4830SMF999_
IOSUB_
AVG_
SVC_
TIME
4binary
Average service time
5234SMF999_
IOSUB_
CHECK_
POINT_
TIME
4binary
Average service time of the subsystem when SRM set a target
5638SMF999_
IOSUB_
INDEX
2binary
IO Subsystem Index
583ASMF999_
LCU_
SQNUMBER
2binary
LCU sequence number
603CSMF999_
CONTROL_
UNIT_
ARRAY
16binary
Control unit numbers, SMF999_CONTROL_UNITS(1-8), associated with LCU
764CSMF999_
IOSUB_
PROJECTED_
VELOCITY
4binary
Projected velocity to be expected if a change is to be made
8050SMF999_
IOSUB_
INTERVAL_
VELOCITY
4binary
The 10 second I/O velocity that is used to plot a point.
8454SMF999_
AVG_
BUSY_
TO_
CONNECT_
RATIO
4binary
The average busy to connect time ratio calculated by WLM during the 10 second copy interval.
8858SMF999_
CLEAR_
INTERVAL
2binary
Clear interval index
905ASMF999_
CSS_
NUMBER
1binary
Channel subsystem identifier
915B--1binary
Reserved
925CSMF999_
IOSUB_
INTERVALCHANNELWAITTIME
4HEX
Interval Channel-Wait-Time
9660SMF999_
TIMESTAMP_
SYSTEM
8EBCDIC
Identifies the system that made a CONFIG change
Subtype 9 - I/O Subsystem Plot Section
(Offset from beginning of record: SMF999_IOSUB_PLOT_OF)
00SMF99_
IOSUB_
BW
4binary
Bucket width
44SMF99_
IOSUB_
LSTX
4binary
Last plotted x bucket
88--4binary
Reserved
12CSMF99_
IOSUB_
POINTS_
OF
4binary
Offset of point entries
1610SMF99_
IOSUB_
POINTS_
ON
2binary
Number of point entries
1812SMF99_
IOSUB_
POINTS_
LN
2binary
Length of a point entry
Subtype 9 - Channel Path Data Entry Section
(Offset from beginning of record: SMF999_CHANNEL_DATA_OF)
00SMF999_
CHANNEL_
ID
1binary
I/O Subsystem channel ID.
11SMF999_
CHANNEL_
TYPE
1binary
I/O Subsystem channel type.
22SMF999_
CHANNEL_
FLAG
1binary
I/O Subsystem channel flags bit indicate if channel is managed: Bit Meaning When Set 0 Indicates that this channel can be managed by WLM. 1-7 Reserved.
33--1EBCDIC
Reserved
44SMF999_
CHANNEL_
UTILIZATION
4binary
I/O Subsystem Channel utilization for the current data collection interval.
88SMF999_
CHANNEL_
PROJECTED_
UTILIZATION
1binary
Projected I/O Subsystem Channel utilization for the current data collection interval (percentage)
99SMF999_
CHANNEL_
PROJ_
CURRENT_
PATH_
LOAD
1binary
Percent use for path projected for the current configuration during the calibration pass.
10ASMF999_
CHANNEL_
#SYSTEMS_
CONTRIBUTED
2binary
Count of systems that have contributed to this channel data.
12CSMF999_
CHANNEL_
PORT_
BUSY_
COUNT
4binary
Channel port busy count.

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

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Pacific Systems Group.
All rights reserved.


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