You can take advantage of several new functions introduced by CICS® enhancements to support for the IBM® JVM:
The Xresettable option can still be used in JVM profiles to create a resettable JVM or a single-use JVM, but it cannot be used to create a continuous JVM. The CICS-supplied sample JVM profiles for CICS TS for z/OS, Version 2.3 use the REUSE option rather than the Xresettable option. If you are re-using existing JVM profiles and you want to include the REUSE option, it is advisable to remove the Xresettable option, although if the options conflict the REUSE option overrides the Xresettable option.
As alternatives to using CETR, you can set the default JVM trace options using the new CICS system initialization parameters JVMLEVEL0TRACE, JVMLEVEL1TRACE, JVMLEVEL2TRACE, and JVMUSERTRACE, or the EXEC CICS SET JVMPOOL command. You can also activate JVM trace using the CICS system initialization parameters SPCTRSJ or STNTRSJ, or the EXEC CICS SET TRACETYPE command. You can find out what the current JVM trace options are using the EXEC CICS INQUIRE JVMPOOL command.
If you need to trace a JVM during its whole lifetime, including start-up and reset as well as the periods when it is being used by a transaction, you can still set and activate trace options using the ibm.dg.trc.external system property in the JVM properties file.
JVM trace can produce a large amount of output, so you should normally activate JVM trace for special transactions, rather than turning it on globally for all transactions.
For more information about JVM tracing, see "Controlling tracing for JVMs" in Java Applications in CICS.