








	*SMF Tools*

SMF Type 120 Record - Subtype 3

This table shows the record layout for type 120 SMF records
(WebSphere Application Server Interval Record).

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

Purpose: WebSphere Application Server writes record type 120 to collect WebSphere Application Server performance statistics.

Record type 120 has the following subtypes:

Subtype 1 - the Server Activity record
Subtype 3 - the Server Interval record
Subtype 5 - the J2EE Container Activity Record
Subtype 6 - the J2EE Container Interval Record
Subtype 7 - the WebContainer Activity record
Subtype 8 - the WebContainer Interval record

Subype 3 - Server Interval Record

The purpose of the server interval SMF record is to record activity that is running inside a WebSphere® Application Server for z/OS®. This record is produced at regular intervals and is an aggregate of the work that ran inside the server instance during the interval.

A single record is created for each server instance that has interval recording active during the interval. When a server is configured with multiple server instances, each server instance writes a record and the records from all the server instances must be merged by whoever is looking at the SMF records to get a complete view of the work that ran inside the logical server.

You can activate this record through the administrative console by setting server_SMF_server_interval_enabled=1 (or server_SMF_server_interval_enabled=true). You can specify an interval through the administrative console by setting server_SMF_interval_length=n, where n is the desired number of seconds.

It's easy to report on SMF 120 data! (Jump to sample reports)

We have a low-cost 4GL report writer especially for SMF files. It's called Spectrum SMF Writer.

Spectrum SMF Writer handles the difficult SMF record parsing for you automatically. You just specify which fields you want to see.

Spectrum SMF Writer also converts the arcane date and time fields and reformats them into an attractive report.

Plus, Spectrum SMF Writer can export SMF data as comma delimited files to use on your PC.

SMF Type 120 Record -- WebSphere Application Server Interval Record
Offset (Dec.)	Offset (Hex)	Name	Length	Format	Description
0	0	SMF120LEN	2	binary	Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word).
2	2	SMF120SEG	2	binary	Segment descriptor (see record length field)
4	4	SMF120FLG	1	binary	Bit meaning when set 0: New SMF record format 1: Subtypes used 2: Reserved 3-6: Version indicators* 7: Reserved
5	5	SMF120RTY	1	binary	Record type 120(X'78')
6	6	SMF120TME	4	binary	Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
10	A	SMF120DTE	4	packed	Date when the record was moved into the SMF buffer, in the form 0 cyydddF.
14	E	SMF120SID	4	EBCDIC	System identification (from the SMFPRMxx SID parameter)
18	12	SMF120SSI	4	EBCDIC	Subsystem identification from SUBSYS parameter
22	16	SMF120RST	2	binary	Record subtype: 1: Server activity 2: Container activity 3: Server interval 4: Container interval. 5: J2EE container activity 6: J2EE container interval 7: WebContainer activity 8: WebContainer interval
24	18	SMF120TRN	4	binary	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. Subtypes: 1: Value is equal to the number of sessions +2 2 and 4: Value is equal to the number of classes +2.
28	1C	SMF120PRS	4	binary	Offset to product section from RDW.
32	20	SMF120PRL	4	binary	Length of product section.
36	24	SMF120PRN	4	binary	Number of product sections.
Individual header extension for subtype 3
40	28	SMF120SIS	4	binary	Offset to server interval section from RDW
44	2C	SMF120SIL	4	binary	Length of server interval section
48	30	SMF120SIN	4	binary	Number of server interval sections
The following triplet appears once for each server region section.
52	34	SMF120SRS	4	binary	Offset to server region section from RDW
56	38	SMF120SRL	4	binary	Length of server region section
60	3C	SMF120SRN	4	binary	Number of server region sections
Product Section(Offset from beginning of record: SMF120PRS)
0	0	SMF120MFV	4	binary	CB SMF version
4	4	SMF120COD	8	EBCDIC	Character codeset in which strings in the SMF record are encoded
12	C	SMF120END	4	binary	Encode of numbers in the SMF record
16	10	SMF120TSF	4	binary	Encoding of timestamps: 1: S390STCK64: The time values are encoded in 64-bit S/390 Store Clock format.
Reassembly information.
20	14	SMF120IXR	4	binary	Index of this record
24	18	SMF120NRC	4	binary	Total number of records
28	1C	SMF120NTR	4	binary	Total number of triplets
Server Interval Section Contains aggregated information about all activities that occurred within the specified server interval. There is one server interval section per record. (Offset from beginning of record: SMF120SIS)
0	0	SMF120HN2	64	EBCDIC	WebSphere Application Server for z/OS transaction server host name
64	40	SMF120SNI	8	EBCDIC	WebSphere Application Server for z/OS transaction server name
72	48	SMF120INI	8	EBCDIC	WebSphere Application Server for z/OS transaction server instance name
80	50	SMF120SST	16	S390STCK	Time that the sample began in the server
96	60	SMF120SET	16	S390STCK	Time that the sample ended
112	70	SMF120NG2	4	binary	Number of global transactions that have run through the server instance during the interval that have been initiated by the server instance during the interval
116	74	SMF120NL2	4	binary	Number of local transactions that have been initiated by the server instance during the interval
120	78	SMF120NCS	4	binary	Reserved
124	7C	SMF120NCA	4	binary	The number of communications sessions that have been active during the interval
128	80	SMF120NLS	4	binary	Reserved
132	84	SMF120NLA	4	binary	Number of active local communication sessions that have been attached and active within the server instance during the interval
136	88	SMF120NRS	4	binary	Reserved
140	8C	SMF120NRA	4	binary	Number of active remote communication sessions that have been attached and active within the server instance during the interval
144	90	SMF120BTS	4	binary	Number of bytes that have been transferred to the server from all attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120ITS, an 8-byte field, instead.
148	94	SMF120BFS	4	binary	Number of bytes that have been sent from the server to all attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120IFS, an 8-byte field, instead.
152	98	SMF120BTL	4	binary	Number of bytes that have been transferred to the server from all locally attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120ITL, an 8-byte field, instead.
156	9C	SMF120BFL	4	binary	Number of bytes that have been transferred from the server to all locally attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120IFL, an 8-byte field, instead.
160	A0	SMF120BTR	4	binary	Number of bytes that have been transferred to the server from all remotely attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120ITR, an 8-byte field, instead.
164	A4	SMF120BFR	4	binary	Number of bytes that have been transferred from the server to all remotely attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120IFR, an 8-byte field, instead.
168	A8	SMF120J2	4	binary	J2EE server.
172	AC	SMF120CL1	8	EBCDIC	WebSphere Application Server for z/OS transaction server cell name
180	B4	SMF120ND1	8	EBCDIC	WebSphere Application Server for z/OS transaction server node name
188	BC	SMF120NHS	4	binary	Reserved
192	C0	SMF120NHA	4	binary	Number of HTTP communication sessions that have been attached and active within the server instance during the interval
196	C4	SMF120BTH	4	binary	Number of bytes that have been transferred to the server from all HTTP attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120ITH, an 8-byte field, instead.
200	C8	SMF120BFH	4	binary	Number of bytes that have been transferred from the server to all HTTP attached clients 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120IFH, an 8-byte field, instead.
204	CC	SMF120TEC	8	binary	Total CPU time accumulated by the WLM enclaves. TOD clock format (bit 51 = microseconds).
212	D4	SMF120ITS	8	binary	Number of bytes that have been transferred to the server from all attached clients.
220	DC	SMF120IFS	8	binary	Number of bytes that have been sent from the server to all attached clients
228	E4	SMF120ITL	8	binary	Number of bytes that have been transferred to the server from all locally attached clients
236	EC	SMF120IFL	8	binary	Number of bytes that have been transferred from the server to all locally attached clients
244	F4	SMF120ITR	8	binary	Number of bytes that have been transferred to the server from all remotely attached clients
252	FC	SMF120IFR	8	binary	Number of bytes that have been transferred from the server to all remotely attached clients
260	104	SMF120ITH	8	binary	Number of bytes that have been transferred to the server from all HTTP attached clients
268	10C	SMF120IFH	8	binary	Number of bytes that have been transferred from the server to all HTTP attached clients
276	114	SMF120ITP	8	binary	Number of bytes that have been transferred to the server from all SIP attached clients
284	11C	SMF120IFP	8	binary	Number of bytes that have been transferred from the server to all SIP attached clients.
292	124	SMF120NPA	4	Binary	Number of SIP communication sessions that have been attached and active within the server instance during the interval
296	128	SMF120BTP	4	binary	Number of bytes that have been transferred to the server from all SIP attached clients. 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120ITP, an 8-byte field, instead.
300	12C	SMF120BFP	4	binary	Number of bytes that have been transferred from the server to all SIP attached clients. 'FFFFFFFF'X indicates the 4-byte field is too small. Use SMF120IFP, an 8-byte field, instead.
304	130	SMF120IR1	4	--	Reserved
Server Servant Section Contains information about each server servant in the specified interval. There are zero, one, or multiple sections per record. (Offset from beginning of record: SMF120SRS)
0	0	SMF120SSA	4	binary	Servant address space ID
4	4	SMF120SNT	4	binary	Number of triplets.
Heap ID Triplets The following triplet appears 0-n times; once for each Heap ID Section. (Offset from beginning of record: SMF120SRS+8)
0	0	SMF120SSO	4	binary	Offset to heap id section from the beginning of this server servant section.
4	4	SMF120SSL	4	binary	Length of heap id section.
8	8	SMF120SSN	4	binary	Number of heap id sections.
Heap ID Section There are zero, one, or multiple sections per server servant section. The Heap ID Section contains information about all heaps of this server servant involved in this activity (Offset from beginning of record: SMF120SSO)
0	0	SMF120HIH	4	binary	The heap for which the following data applies.
4	4	SMF120HIC	4	binary	Number of allocation failures on this heap during the interval.
8	8	SMF120HI1	8	binary	Minimum number of bytes during the interval.
16	10	SMF120HI2	8	binary	Maximum number of bytes during the interval.
24	18	SMF120HI3	8	binary	Average number of bytes during the interval.
32	20	SMF120HI4	8	binary	Minimum number of free bytes during the interval.
40	28	SMF120HI5	8	binary	Maximum number of free bytes during the interval.
48	30	SMF120HI6	8	binary	Average number of free bytes during the interval.

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.

Sample Report from SMF 120
WebSphere Application Java CPU Times

The sample SMF report below was created with Spectrum SMF Writer, the low-cost 4GL SMF report writer. It reads as input the SMF file and selects just the type 120 WebSphere Application records for Jave 2 Enterprise Edition containers. (See SMF 120-5 record layout.) It then prints a report line for each Java bean method accounting section found. The report shows CPU time information about those Java bean methods. Note that a single SMF 120 record can contain information about multiple beans and multiple methods per bean.

All of this with just a few of code!
Why not install a Spectrum SMF Writer trial right now and start making your own SMF reports!

These Spectrum SMF Writer Statements:


INPUT:  SMF12005

INCLUDEIF: SMF120RTY=120   AND SMF120RST=5

TITLE: 'Z/OS WEBSPHERE APPLICATION SMF 120 DATA'
TITLE: 'SUBTYPE 5 -- J2EE CONTAINER ACTIVITY'

COL: SMF120RST(3 'SUB/TYP')
     SMF120JA4(5 'TRANS/SERVER/HOST')
     SMF120JA5(6 'TRANS/SERVER/NAME')
     SMF120JA8_EBC(8 'CONTAINER/NAME')
     SMF120CL2('CELL')
     SMF120ND2('NODE')
     SMF120JB1_EBC(10 'BEAN/NAME')
     SMF120JM1_EBC(25 'BEAN/METHOD')
     SMF120JM2(5 'TIMES/INVOK')
     SMF120JM3('AVG/RSP/TIME' TPIC'9.999' )
     SMF120JM4('MAX/RSP/TIME' TPIC'9.999'  )
     SMF120JMQ('AVG/CPU/TIME' TPIC'9.999999' )
     SMF120JMR('MIN/CPU/TIME' TPIC'9.999999')
     SMF120JMS('MAX/CPU/TIME' TPIC'9.999999')

Produce This SMF Report:


                                            Z/OS WEBSPHERE APPLICATION SMF 120 DATA
                                             SUBTYPE 5 -- J2EE CONTAINER ACTIVITY

     TRANS TRANS                                                                         AVG   MAX    AVG      MIN      MAX
 SUB SERVE SERVER CONTAINE                      BEAN              BEAN            TIMES  RSP   RSP    CPU      CPU      CPU
 TYP HOST   NAME    NAME     CELL     NODE      NAME             METHOD           INVOK TIME  TIME    TIME     TIME     TIME
 ___ _____ ______ ________ ________ ________ __________ _________________________ _____ _____ _____ ________ ________ ________

   5 AWT4  AXZ4S1 Default  AXZ4     AXZ44    Tonam::Inf invoke:java.lang.String,j     1 0.014 0.014 0.013665 0.013665 0.013665
   5 AWT4  AXZ4S1 Default  AXZ4     AXZ44    Tonam::Inf invoke:java.lang.String,j     1 0.020 0.020 0.006287 0.006287 0.006287
   5 AWT4  AXZ4S1 Default  AXZ4     AXZ44    Tonam::Inf login:java.lang.String,ja     1 0.006 0.006 0.004206 0.004206 0.004206
   5 AWT4  AXZ4S1 Default  AXZ4     AXZ44    Tonam::Inf invoke:java.lang.String,j     1 0.004 0.004 0.003605 0.003605 0.003605
   5 AWT4  AXZ4S1 Default  AXZ4     AXZ44    Tonam::Inf invoke:java.lang.String,j     1 0.007 0.007 0.004831 0.004831 0.004831
   5 AWT4  AXZ4S1 Default  AXZ4     AXZ44    Tonam::Inf invoke:java.lang.String,j     2 0.005 0.010 0.005650 0.001264 0.010036

 *** GRAND TOTAL (     6 ITEMS)

See other sample SMF reports.