Specifications

Chapter 3. z/OS notes 29
This command may take several seconds to execute. It updates each server’s
genericJVMArgument value.
References
The following two URLs may be used to obtain more JVM information related to startup
performance and diagnostic techniques:
򐂰 IBM Java 5 Diagnostic Guide
http://publib.boulder.ibm.com/infocenter/javasdk/v5r0/index.jsp
򐂰 CICS® and JVM Startup Time
http://publib.boulder.ibm.com/infocenter/cicsts/v2r2/index.jsp%3Ftopic%3D/com.i
bm.cics.ts22.doc/dfhpj/dfhpj93.htm
3.7 Standalone z/OS dump
The z/OS “standalone dump” (SAD) is a program that is IPLed from tape or disk. It does not
run under z/OS. However, it assumes that z/OS is present in System z memory at the time the
standalone dump is IPLed. The standalone dump program is sensitive to the release of z/OS
that is being used and should match the z/OS release. That is, a new version of the
standalone dump program should be generated whenever a new release of z/OS is installed.
This section describes a simplified use of standalone dump based on the AD z/OS system
release 1.12. The dump program itself is placed on an IPLable disk volume and the dump
output is directed to another disk volume.
Disk volumes
Two disk volumes are referenced here. One is for the dump program itself, which is relatively
small (about 100 tracks). This volume also contains IPL text to start the standalone dump
program. This volume must be mounted as PRIVATE to run the dump generation job, but can
be in any mount status when IPLing the dump program.
The other volume is for the dump itself. A standalone dump can be large: hundreds of
cylinders up to many thousands of cylinders. In our example we assume a suitable volume is
mounted at address AC0. Before using the standalone dump program, you must create the
dump output data set on this volume using an IPCS utility function.
3.7.1 Generating a standalone dump program
The following job generates the standalone dump program and writes it on volume LOCAL1.
You later IPL it from this volume when you want to take a standalone dump.
//SADBILL JOB 1,OGDEN,MSGCLASS=X,REGION=40M
// EXEC PGM=AMDSAOSG
//SYSLIB DD SYS1.MACLIB,DISP=SHR
// DD SYS1.MODGEN,DISP=SHR
//DSFSYSIN DD DSN=&DSFSYSIN,DISP=(,PASS),
// SPACE=(80,(4,1)),UNIT=SYSDA
//TRK0TEXT DD DSN=&TRK0TEXT,DISP=(,PASS),
// SPACE=(4096,(2,1)),UNIT=SYSDA
//GENPRINT DD SYSOUT=*
//GENPARMS DD *
AMDSADMP IPL=D3390,VOLSER=LOCAL1,CONSOLE=(700,3279), X