The Performance Data Collector (PDC) tool provides profile information about the programs that run on the iSeries™ server.
The industry-standard profile option on many Java™ virtual machines depends on the implementation of the java_g feature. This is a special debug version of the Java virtual machine, which offers the -prof option. You specify this option on a call to a Java program. When you specify this option, the Java virtual machine produces a record file that contains information about which parts of the Java program were operating during the duration of the program. The Java virtual machine generates this information in real time.
On the iSeries server, the Performance Explorer (PEX) feature analyzes programs and record-specific system events. A DB2® database stores this information and retrieves it using SQL functions. PEX information is the repository for specific program information that produces Java profile data. This profile data is compatible with java_g -prof program profile information. The Java Performance Data Converter (JPDC) tool provides java_g -prof program output and program profile information for a specific IBM® tool, which is known as Jinsight.
For information on how collect Java performance data, see Collect Java performance data.