SMF record type 120: overview

Information resulting from the SMF data gathering process for WebSphere Application Server for z/OS is held in SMF record type 120.

This information is typically presented with the help of a SMF data viewing tool. This record format description is intended to enable the tool providers to design a SMF data viewing tool. Your system administrators will use a SMF data viewing tool with a description presented by the tool provider, since it requires them to make proper selections that limit the amount of presentation data. For example, they might want to view a specific time frame and only specific containers, classes, and methods. They may also occasionally need to refer to the record descriptions.

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.

Eight records can be produced:

• the Server Activity record: Subtype 1

• the Server Interval record: Subtype 3

• the J2EE Container Activity Record: Subtype 5

• the J2EE Container Interval Record: Subtype 6

• the WebContainer Activity record: Subtype 7

• the WebContainer Interval record: Subtype 8

• the Request Activity record: Subtype 9

• the Outbound Request record: Subtype 10

For additional information about using SMF records, see z/OS MVS™ System Management Facilities (SMF), SA22-7630.

View records with the SMF Browser

We can use the SMF Browser, that is available on the product download site, to display record type 120. To download the SMF Browser, go to: https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=zosos390.

The documentation provided with the download package describes how to use this tool.

Subtopics

• SMF record type 120 (78) - WebSphere Application Server performance statistics
  WebSphere Application Server writes record type 120 to collect WebSphere Application Server performance statistics.

Related tasks

Collecting job-related information with the System Management Facility (SMF)

Related information:

MVS System Management Facilities (SMF) Reference topic