








	*SMF Tools*

SMF Type 31 Record

This table shows the record layout for type 31 SMF records
(TIOC Initialization).

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

Purpose: Record type 31 is written when a MODIFY TCAM operator command is issued. This record contains the number of time-sharing buffers, buffer size, maximum number of output and input buffers allowed per terminal before OWAIT or LWAIT, OWAIT and RESTART thresholds, number of buffers reserved on the free queue, and the size of one terminal status block. OWAIT is the suspension of the program during input/output processing to the terminal because no output buffers are available. LWAIT is the locking of the terminal’s keyboard because the terminal user filled all of the available input buffers.

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SMF Type 31 Record -- TIOC Initialization
Offset (Dec.)	Offset (Hex)	Name	Length	Format	Description
0	0	SMF31_ TTI31LEN	2	binary	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.
2	2	SMF31_ TTI31SEG	2	binary	Segment descriptor (see record length field).
4	4	SMF31_ TTIRFLG	1	binary	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.
5	5	SMF31_ TTIRCDTY	1	binary	Record type 31 (X'1F').
6	6	SMF31_ TTIRCDTS	4	binary	Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
10	A	SMF31_ TTIRCDTE	4	packed	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.
14	E	SMF31_ TTICPUID	4	EBCDIC	System identification (from the SID parameter).
18	12	SMF31_ TTINBF	2	binary	Number of time-sharing buffers.
20	14	SMF31_ TTIBUFSE	2	binary	Time-sharing buffer size, in bytes.
22	16	SMF31_ TTIRSVRD	2	--	Reserved.
24	18	SMF31_ TTIOMAX	2	binary	Maximum number of output buffers allowed per terminal before OWAIT.
26	1A	SMF31_ TTIIMAX	2	binary	Maximum number of input buffers allowed per terminal before LWAIT.
28	1C	SMF31_ TTIOWTH	2	binary	OWAIT threshold. The number of buffers that must be freed in order to be freed from OWAIT.
30	1E	SMF31_ TTIRSTH	2	binary	RESTART threshold. The number of buffers that must be freed in order to be freed from LWAIT.
32	20	SMF31_ TTIUSLW	2	binary	Number of buffers reserved on the free queue (less than this number results in a system-wide LWAIT).
34	22	SMF31_ TTIUSSL	2	--	Reserved.
36	24	SMF31_ TTITSBS	1	binary	Size of one terminal status block (TSB).
37	25	SMF31_ TTIUSCH	21	Reserved.

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

Spectrum SMF Writer - the 4GL SMF Report Writer.

SMF Type 31 Record

This table shows the record layout for type 31 SMF records (TIOC Initialization).

It's easy to report on SMF 31 data!

This table shows the record layout for type 31 SMF records
(TIOC Initialization).