110 Geac System21 commerce.connect: Implementation on the iSeries Server
Native driver: This driver may only be used by a Java application that is running on the
iSeries.
In most cases, if you are running WebSphere on the iSeries, the native driver offers better
performance. If you used the standard configuration, as described in Chapter 3, “Installing
and setting up call.connect” on page 19, then you will use the native driver.
Connections made by the native driver are serviced by jobs of the name QSQSRVR in the
QSYSWRK subsystem. These are
prestart jobs. Prestart jobs are used by IBM to speed
connection times for many server jobs. Depending on the subsystem configuration, several
server jobs may start together with the subsystem. The jobs then wait for a connection
request. When a request is received, the jobs process the request. When a disconnect
request is received, the jobs usually return to the wait state and wait for the next connection.
The default configuration of the QSQSRVR job is unlikely to give good performance for
WebSphere applications. To check the configuration, follow these steps:
1. Sign on as QSECOFR.
2. Enter the following command:
DSPSBSD QSYSWRK
3. Figure 5-2 shows the Display Subsystem Description menu. Select option 10.
Figure 5-2 Display Subsystem Description menu
4. The Display Prestart Job Entries display (Figure 5-3) appears. Tab down to the program
name QSQSRVR, type 5 next to it, and press Enter.
