SMF Type 75 Record
This table shows the record layout for type 75 SMF records
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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.
Segment descriptor (see record length field).
Bit Meaning When Set
0 New record format
1 Subtypes used
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.
Record type 75 (X'4B').
Time since midnight, in hundredths of a second, when the record was moved into the SMF buffer.
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.
System identification (from the SMFPRMxx SID parameter).
Subsystem identification (‘RMF').
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.
Offset to RMF product section from RDW.
Length of RMF product section.
Number of RMF product sections.
Offset to page data set data section from RDW.
Length of page data set data section.
Number of page data set data sections.
RMF version number.
Product name (‘RMF').
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.
Date when the RMF measurement interval started, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.
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.)
Number of RMF samples.
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.
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.
MVS software level (consists of an acronym and the version, release, and modification level - ZVvvrrmm).
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
PR/SM partition number of the partition that wrote this record.
SMF record level change number (X'5D' for z/OS V1R13 RMF). This field enables processing of SMF record level changes in an existing release.
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).
Offset GMT to local time (STCK format).
Offset to reassembly area relative to start of RMF product section.
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.
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.
Original interval length as defined in the session or by SMF (in seconds).
SYNC value in seconds.
Projected gathering interval end (STCK format) GMT time.
Sysplex name as defined in parmlib member COUPLExx.
System name for current system as defined in parmlib member IEASYSxx SYSNAME parameter. Reassembly Area:
Total number of broken records built from the original large record.
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.
Offset to first reassembly information block relative to start of reassembly area header.
Length of reassembly information block.
Number of reassembly information blocks (same value as SMF75TRN in header section).
Reserved. Reassembly Area Information Block:
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.
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 name.
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.
Bit Meaning When Set
0 Data set accepts VIO pages
1 Data set is on a multiple exposure device
2 Data set is on a device with an alternate control unit
3 SMF75DEV contains a valid device name
Device number in the form hhhh (hex digits).
Volume serial number.
Total number of slots contained within the page data set.
Maximum number of slots used.
Minimum number of slots used.
Average number of slots used.
Number of unusable slots.
Number of samples indicating data set was being used by ASM.
The value is the same as SMF75USE.
Number of I/O requests for the data set.
Number of pages transferred to or from page data set.
Device name (blank if device name cannot be determined).
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.