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SMF Type 75 Record

This table shows the record layout for type 75 SMF records
(RMF Page Data Set Activity - z/OS 1.11).

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

Purpose: Record type 75 is written at the end of each RMF measurement interval. One record is written for each page data set monitored during the interval.

As with all SMF records RMF produces, record type 75 contains a header section and RMF product section. These are followed by:

  • Page Data Set Data Section Provides information on the use of auxiliary storage page slots and the use of the page data set by the auxiliary storage manager (ASM)

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SMF Type 75 Record -- RMF Page Data Set Activity - z/OS 1.11
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF75LEN2binary
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.
22SMF75SEG2binary
Segment descriptor (see record length field).
44SMF75FLG1binary
System indicator
Bit Meaning When Set
0 New record format
1 Subtypes used
2 Reserved.
3-6 Version indicators*
7 System is running in PR/SM mode.
*See “Standard SMF Record Header” on page 13-1 for a detailed description.
55SMF75RTY1binary
Record type 75 (X'4B').
66SMF75TME4binary
Time since midnight, in hundredths of a second, when the record was moved into the SMF buffer.
10ASMF75DTE4packed
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.
14ESMF75SID4EBCDIC
System identification (from the SMFPRMxx SID parameter).
1812SMF75SSI4EBCDIC
Subsystem identification (‘RMF').
2216SMF75STY2binary
Record subtype=1.
2418SMF75TRN2binary
Number of triplets in this record. A triplet is a set of three SMF fields (offset/length/number values) that defines a section of the record. The offset is the offset from the RDW.
261A--2binary
Reserved.
281CSMF75PRS4binary
Offset to RMF product section from RDW.
3220SMF75PRL2binary
Length of RMF product section.
3422SMF75PRN2binary
Number of RMF product sections.
3624SMF75PSS4binary
Offset to page data set data section from RDW.
4028SMF75PSL2binary
Length of page data set data section.
422ASMF75PSN2binary
Number of page data set data sections.
RMF Product Section
(Offset from beginning of record: SMF75PRS)
00SMF75MFV2packed
RMF version number.
22SMF75PRD8EBCDIC
Product name (‘RMF').
10ASMF75IST4packed
Time that the RMF measurement interval started, in the form 0hhmmssF, where hh is the hours, mm is the minutes, ss is the seconds, and F is the sign.
14ESMF75DAT4packed
Date when the RMF measurement interval started, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
1812SMF75INT4packed
Duration of the RMF measurement interval, in the form mmsstttF where mm is the minutes, ss is the seconds, ttt is the milliseconds, and F is the sign. The end of the measurement interval is the sum of the recorded start time (and this field.)
2216--2binary
Reserved.
2418SMF75SAM4binary
Number of RMF samples.
281C--2binary
Reserved.
301ESMF75FLA2binary
Flags Bit Meaning When Set 0 Reserved 1 Samples have been skipped 2 Record was written by RMF Monitor III 3 Interval was synchronized with SMF 4-15 Reserved.
3220--4binary
Reserved.
3624SMF75CYC4packed
Sampling cycle length, in the form 000ttttF, where tttt is the milliseconds and F is the sign (taken from CYCLE option). The range of values is 0.050 to 9.999 seconds.
4028SMF75MVS8EBCDIC
MVS software level (consists of an acronym and the version, release, and modification level - ZVvvrrmm).
4830SMF75IML1binary
Indicates the type of processor complex on which data measurements were taken. Value Meaning 3 9672, zSeries 49 31 SMF73PRF 1 binary Processor flags.
Bit Meaning When Set
0 The system has expanded storage
1 The processor is enabled for ES connection architecture (ESCA)
2 There is an ES connection director in the configuration
3 System is running in z/Architecture mode
4 At least one zAAP is currently installed
5 At least one zIIP is currently installed
6 Enhanced DAT architecture available
7 Reserved.
5032SMF75PTN1binary
PR/SM partition number of the partition that wrote this record.
5133SMF75SRL1binary
SMF record level change number (X'56' for z/OS V1R11 RMF). This field enables processing of SMF record level changes in an existing release.
5234SMF75IET8char
Interval expiration time token. This token can be used to identify other than RMF records that belong to the same interval (if interval was synchronized with SMF).
603CSMF75LGO8binary
Offset GMT to local time (STCK format).
6844SMF75RAO4binary
Offset to reassembly area relative to start of RMF product section.
7248SMF75RAL2binary
Length of reassembly area. Area consists of a fixed header and a variable number of information blocks. Length depends on the record type/subtype, but is fixed for a specific type/subtype.
744ASMF75RAN2binary
Reassembly area indicator. Value Meaning 0 Record is not broken 1 Record is broken.Note: This field is used to indicate whether an SMF record is a broken record. Therefore, offset (SMF75RAO) and length (SMF75RAL) are only valid if SMF75RAN = 1. A reassembly area is only present in broken records.
764CSMF75OIL2binary
Original interval length as defined in the session or by SMF (in seconds).
784ESMF75SYN2binary
SYNC value in seconds.
8050SMF75GIE8binary
Projected gathering interval end (STCK format) GMT time.
8858SMF75XNM8EBCDIC
Sysplex name as defined in parmlib member COUPLExx.
9660SMF75SNM8EBCDIC
System name for current system as defined in parmlib member IEASYSxx SYSNAME parameter. Reassembly Area:
Reassembly Area
(Offset from beginning of record: SMF75PRS + SMF75PRL)
00SMF75RBR2binary
Total number of broken records built from the original large record.
22SMF75RSQ2binary
Sequence number of this broken record. Every broken record built from the same large record must have a unique sequence number, it is in the range from 1 to SMF75RBR.
44SMF75RIO4binary
Offset to first reassembly information block relative to start of reassembly area header.
88SMF75RIL2binary
Length of reassembly information block.
10ASMF75RIN2binary
Number of reassembly information blocks (same value as SMF75TRN in header section).
12C--4binary
Reserved. Reassembly Area Information Block:
Reassembly Area Information Block
(Offset from beginning of record: SMF75PRS + SMF75PRL + SMF75RIO)
00SMF75RNN2binary
Total number of sections in the original large record. This field contains information of how many sections of a specific type were contained in the original SMF record. This field is a copy of the number field of the triplet in the original (non broken) record.
22SMF75RPP2binary
Position of the first of one or more consecutive sections described by this block as in the original record. Values in the range of 1 to SMF75RNN are valid for correct processing. A value of 0 will skip processing of this information block. This field provides information where the sections that are part of this broken record were placed in the original record before the split took place. The actual number of consecutive sections contained in this record is available from the actual triplet in the header extension.
Page Data Set Data Section
(Offset from beginning of record: SMF75PSS)
00SMF75DSN44EBCDIC
Page data set name.
442CSMF75PST1binary
Page space type Bit Meaning When Set 0 PLPA 1 COMMON 2 Reserved 3 LOCAL 4 Reserved 5 Data set unusable 6 Data set brought online during interval 7 Data set taken offline during interval.
452DSMF75FL21binary
Flags Bit Meaning When Set 0 Data set accepts VIO pages 1 Reserved 2 Data set is on a device with an alternate control unit 3 SMF75DEV contains a valid device name 4-7 Reserved.
462E--1binary
Reserved.
472FSMF75TYP4binary
Unit type.
5133SMF75CHA2binary
Device number in the form hhhh (hex digits).
5335SMF75VOL6EBCDIC
Volume serial number.
593B--5binary
Reserved.
6440SMF75SLA4binary
Total number of slots contained within the page swap data set.
6844SMF75MXU4binary
Maximum number of slots used.
7248SMF75MNU4binary
Minimum number of slots used.
764CSMF75AVU4binary
Average number of slots used.
8050SMF75BDS4binary
Number of unusable slots.
8454SMF75USE4binary
Number of samples indicating data set was being used by ASM.
885ASMF75REQ4binary
The value is the same as SMF75USE.
925CSMF75SIO4binary
Number of I/O requests for the data set.
9660SMF75PGX4binary
Number of pages transferred to or from page data set.
10064SMF75DEV8EBCDIC
Device name (blank if device name cannot be determined).
1086CSMF75CU8EBCDIC
Control unit name (blank if control unit name cannot be determined).

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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