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SMF Type 120 Record - Subtype 5

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

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.

This information is typically presented with the help of an SMF data viewing tool. [Ed.] Such as Spectrum SMF Writer, the 4GL report writer and export utility for SMF files.]

Two types of SMF records can be produced: activity records and interval records.

  • Activity records are gathered as each activity within a server is completed. An activity is a logical unit of business function. It can be a server or user-initiated transaction.
  • Interval records consist of data gathered at installation-specified intervals and provide capacity planning and reliability information.

Six records can be produced:

  • 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

Subtype 5: J2EE container activity record

The purpose of the J2EE container activity SMF record is to record activity within a J2EE container that is located inside the WebSphere Application Server transaction server.

This record can be used to perform basic charge-back accounting, application profiling, problem determination, and capacity planning. A single record is created for each activity that is run within a J2EE container located inside a WebSphere Application Server transaction server.

The J2EE container activity record contains:

  • J2EE container activity section (one section per record):
    Contains information about each activity that occurred within one J2EE container.
  • Bean section (multiple (0..n) sections per record):
    Contains information about all beans involved in this activity.
  • Bean method section (multiple (0..n) sections per bean section):
    Contains information about all methods of this bean involved in this activity.

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

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SMF Type 120 Record -- WebSphere Application Server Performance Statistics
Offset
(Dec.)
Offset
(Hex)
NameLengthFormatDescription
00SMF120LEN2binary
Record length. This field and the next field (total of four bytes) form the RDW (record descriptor word).
22SMF120SEG2binary
Segment descriptor (see record length field)
44SMF120FLG1binary
Bit meaning when set
0: New SMF record format
1: Subtypes used
2: Reserved
3-6: Version indicators*
7: Reserved
55SMF120RTY1binary
Record type 120(X'78')
66SMF120TME4binary
Time since midnight, in hundredths of a second, that the record was moved into the SMF buffer.
10ASMF120DTE4packed
Date when the record was moved into the SMF buffer, in the form 0 cyydddF.
14ESMF120SID4EBCDIC
System identification (from the SMFPRMxx SID parameter)
1812SMF120SSI4EBCDIC
Subsystem identification from SUBSYS parameter
2216SMF120RST2binary
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
2418SMF120TRN4binary
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.
281CSMF120PRS4binary
Offset to product section from RDW.
3220SMF120PRL4binary
Length of product section.
3624SMF120PRN4binary
Number of product sections.
Individual header extension for subtype 5
4028SMF120JA14binary
Offset to J2EE container activity section from RDW
442CSMF120JA24binary
Length of J2EE container activity section
4830SMF120JA34binary
Number of J2EE container activity sections
The following triplet appears once for each bean section.
5234SMF120JAS4binary
Offset to bean section from RDW
5638SMF120JAL4binary
Length of bean section
603CSMF120JAN4binary
Number of bean sections
Product Section
(Offset from beginning of record: SMF120PRS)
00SMF120MFV4binary
CB SMF version
44SMF120COD8EBCDIC
Character codeset in which strings in the SMF record are encoded
12CSMF120END4binary
Encode of numbers in the SMF record
1610SMF120TSF4binary
Encoding of timestamps:
1: S390STCK 64: The time values are encoded in 64-bit S/390 Store Clock format.
Reassembly information.
2014SMF120IXR4binary
Index of this record
2418SMF120NRC4binary
Total number of records
281CSMF120NTR4binary
Total number of triplets
Subtype 5 - J2EE container Activity Section

There is one section per record. The J2EE container activity section contains information about each activity that occurred within one J2EE container.

(Offset from beginning of record: SMF120JA1)
00SMF120JA464EBCDIC
WebSphere Application Server for z/OS transaction server host name
6440SMF120JA58EBCDIC
WebSphere Application Server for z/OS transaction server name
7248SMF120JA68EBCDIC
WebSphere Application Server for z/OS transaction server instance name
8050SMF120JA74binary
The specific WebSphere Application Server for z/OS transaction server instance server servant where the request ran
8454SMF120JA8512Unicode
WebSphere Application Server for z/OS container name.
596254SMF120JA98HEX
The WLM enclave token
60425CSMF120JAA4binary
RESERVED
608260SMF120JAB20HEX
The identity of the activity
628274SMF120CL28EBCDIC
Cell
63627CSMF120ND28EBCDIC
Node
Bean Section

There are multiple sections per record.

(Offset from beginning of record: SMF120JAS)
00SMF120JB1512Unicode
AMCName of the bean activated by the container. Note: If the length of the AMCName exceeds 256 DBCS characters (512 bytes), the rightmost 256 characters are recorded.
512200SMF120JB260binary
UUID based AMC name
57223CSMF120JB34binary
The bean's type. 2: Stateless session bean. 3: Stateful session bean. 4: BMP entity bean. 5: CMP entity bean. 6. Message-driven bean.
576240SMF120JB44binary
RESERVED
580244SMF120JB54binary
RESERVED
584248SMF120JB64binary
RESERVED
58824CSMF120JB74binary
The bean's reentrance policy. 0: Not reentrant within transaction. 1: Reentrant within transaction.
592250SMF120JB84binary
RESERVED
596254SMF120JMC4binary
RESERVED
600258SMF120JM64binary
RESERVED
60425CSMF120JB94binary
Number of method triplets in this bean section
Bean Method Triplets

The following triplet appears 0-n times; once for each bean method section.

(Offset from beginning of record: SMF120JAS + 608)
00SMF120JBS4binary
Offset to bean method section from the beginning of this bean section
44SMF120JBL4binary
Length of bean method section
88SMF120JBN4binary
Number of bean method sections
Bean Method Section

There are multiple sections per bean section. The bean method section contains information about all methods of beans involved in this activity.

(Offset from beginning of record: SMF120JBS)
00SMF120JM11024Unicode
The name of the method including its signature in its externalized, human-readable form. If the length of the method exceeds 512 DBCS characters (1024 bytes), the leftmost 512 characters are recorded.
1024400SMF120JM24binary
The number of times the method was invoked during the activity.
1028404SMF120JM34binary
Average response time. The response time is measured in milliseconds (the granularity provided by the JVM - hopefully, it will be equal to 0 in most cases).
1032408SMF120JM44binary
Maximum response time. The response time is measured in milliseconds.
103640CSMF120JM54binary
The bean method's transaction policy. Values from com.ibm.websphere.csi. TransactionAttribute.java:
0: "TX_NOT_SUPPORTED"
1: "TX_BEAN_MANAGED"
2: "TX_REQUIRED"
3: "TX_SUPPORTS"
4: "TX_REQUIRES_NEW"
5: "TX_MANDATORY"
6: "TX_NEVER"
1040410SMF120JM84binary
RESERVED.
1044414SMF120JM94binary
RESERVED.
1048418SMF120JMA512Unicode
List of ejbRoles associated with the method. Separator character: ";" (semicolon). If the length of the concatenated string exceeds 256 characters (512 bytes), only its leftmost 256 characters are recorded.
1560618SMF120JMB4binary
RESERVED.
156461CSMF120JMD4binary
RESERVED.
1568620SMF120JME4binary
ejbLoad: # of invocations
1572624SMF120JMF4binary
ejbLoad: avg execution time
1576628SMF120JMG4binary
ejbLoad: max execution time
158062CSMF120JMH4binary
ejbStore: # of invocations
1584630SMF120JMI4binary
ejbStore: avg execution time
1588634SMF120JMJ4binary
ejbStore: max execution time
1592638SMF120JMK4binary
ejbActivate: # of invocations
159663CSMF120JML4binary
ejbActivate: avg execution time
1600640SMF120JMM4binary
ejbActivate: max execution time
1604644SMF120JMN4binary
ejbPassivate: # of invocations
1608648SMF120JMO4binary
ejbPassivate: avg execution time
161264CSMF120JMP4binary
ejbPassivate: max execution time
1616650SMF120JMQ8binary
Average cpu time in microseconds.
1624658SMF120JMR8binary
Minimum cpu time in microseconds.
1632660SMF120JMS8binary
Maximum cpu time in microseconds.

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

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.

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Pacific Systems Group.
All rights reserved.


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