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SMF Type 7 Record

This table shows the record layout for type 7 SMF records
(Data Lost).

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

Purpose: If all SMF buffers become full (either a result of no available output data sets for SMF to write to OR the system generating records at a rate faster than SMF can physically write them), SMF data will be lost. When this condition occurs, record type 7 tracks the number of lost records. It contains a count of the SMF records that were not written and the start and end times of the period when data was lost. (The end time is the time recorded in SMF7TME at offset 6). Record type 7 is not built until SMF buffers become available again. Data existing in the SMF buffer, prior to data lost, is written to available SMF data sets before record type 7 is written to a data set.

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SMF Type 7 Record -- Data Lost
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF7LEN2binary
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.
22SMF7SEG2binary
Segment descriptor (see record length field).
44SMF7FLG1binary
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.
55SMF7RTY1binary
Record type 7 (X'07').
66SMF7TME4binary
Time since midnight, in hundredths of a second, when the record was built into the SMF buffer.
10ASMF7DTE4packed
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.
14ESMF7SID4EBCDIC
System identification (from the SID parameter).
1812SMF7NRO2binary
Number of SMF records lost because no SMF data sets were available for recording.
2014SMF7STM4binary
Start time since midnight, in hundredths of a second, of the period during which no SMF data sets were available for recording.
2418SMF7STD4packed
Start date, of the period during which no SMF data sets were available for recording, in the form 0cyydddF. See “Standard SMF Record Header” on page 13-1 for a detailed description.

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

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