z/OS MAS-related CICS system initialization parameters

Verify that the sequential data set or partitioned data set member identified by the CICS® SYSIN statement includes the appropriate CICS system initialization parameters.

Table 1 describes the parameters in more detail.

Review all of the listed parameters for each MAS, to ensure that the values specified are appropriate. When you specify YES for a specific resource type (XCMD, XFCT, XPCT, or XPPT), a CICSPlex® SM security profile must exist for that resource type. See the CICSPlex SM security for information about creating security profiles.

Note: To get all data available for the TASK and MLOCTRAN views, MCT must have a value specified, CICS monitoring for performance classes must be activated, and you must be collecting performance class data. See the note for MCT, MONITOR, MN, and MNPER parameters in the following table .
Table 1. CICS system initialization parameters for a z/OS MAS
Parameter Explanation
APPLID= z/OS® Communications Server application ID for this CICS system. Used as MAS name when NAME(value) is not specified as a CICSPlex SM system parameter.
AIEXIT=DFHZATDX z/OS Communications Server terminal autoinstall program.
AUTORESETTIME=IMMEDIATE Time-of-day synchronization.
AUXTR=ON Auxiliary trace - exception records.
AUXTRSW=NEXT No continuous auxiliary trace switching.
CPSMCONN=LMAS Initialize the region as a local MAS.
DFLTUSER=userid Specify the user identifier that is to be used for security checking when a user is not defined to the ESM.
DSALIM=5M Limit of DSA storage in 24-bit (below-the-line) storage. Set this value to at least 5 MB.
EDSALIM=800M Limit of EDSA storage in 31-bit (above-the-line) storage.
DSRTPGM=EYU9XLOP Distributed START routing program.
DTRPGM=EYU9XLOP Dynamic routing program.
DUMPDS=A Transaction dump data set.
DUMPSW=NEXT Switch to next transaction dump data set.
FCT=NO A file control table is not used.
GMTEXT='CICSPlex System Manager - CICS Transaction Server for z/OS' Default logon message.
GRPLIST=DFHLIST Add group lists for your application resource definitions. See CICS resource definitions for CICSPlex SM for additional information.
ICV=100 Region exit interval.
ICVR=5000 Runaway task interval.
ICVTSD=0 Terminal scan delay interval.
INTTR=ON Activate main storage trace.
IRCSTRT=YES IRC started at system initialization.
ISC=YES Code YES to include the CICS programs that are required for interregion and intersystem communications.
MCT= Monitoring control table. If you have CICS performance class monitoring active, you must specify a value for this parameter. You can use 2$ (the default) or an existing table. See note.
MN=ON Activates CICS Monitor. See note.
MNFREQ=001500 Writes performance class data every 15 minutes.
MNPER=ON Tells CICS to monitor performance classes. See note.
Note for MCT, MONITOR, MN, and MNPER parameters: To obtain all data available for the TASK and MLOCTRAN views, MCT must have a value specified, CICS monitoring for performance classes must be activated, and you must be collecting performance class data.

If you do not want this data written to an SMF data set, you can suppress the monitor records. See the description of the SUPPRESSCMF parameter in CICSPlex SM system parameters.

MXT=500 Maximum tasks. Increase by 20 from your normal value for the CICS region to accommodate the CICSPlex SM MAS tasks. CICSPlex SM rarely uses all 20 of these additional tasks. If you are using the MXT value alone to control application transactions, increasing this value can allow more application transactions to run concurrently. To prevent this situation from occurring, you can define a transaction class for the application. Then, set a class maximum task (CMXT) value that limits the number of concurrent transactions.
SEC= {YES|NO} Indicate whether external security checking is to be performed for this CICS system:
YES
When READ access is granted:
  • READ is permitted
  • UPDATE is refused.
When UPDATE access is granted:
  • READ is permitted
  • UPDATE is permitted.
NO
Security checking is not performed.
  1. For CICS security, the value specified with SEC= for a CMAS overrides the value specified with SEC= for a MAS.
  2. For CICSPlex SM security to be active, set SEC=YES for a MAS. The CMAS to which it connects must have the CICSPlex SM system parameter SEC(YES). When CICSPlex SM security is not activated in the CMAS, the connection between the CMAS and the MAS cannot be established. If the connection is attempted, message EYUCR0007E is issued to the console, the CMAS joblog, and the EYULOG.
For more information about the SEC parameter for the CMAS, see CICSPlex SM system parameters.
SECPRFX={YES | NO |prefix} Specify whether the user ID is used as the prefix that is added to the beginning of all resource names to distinguish this CICS system from other CICS systems.
SIT=6$ System initialization table suffix.
SPOOL=YES System spooling interface.
START=AUTO Cold start overriding other options.
SYSIDNT= Indicate the ID of the CICS system. This name must be unique in a CICSplex.
SYSTR=OFF Auxiliary trace - no system activity.
TCT=NO A terminal control table is not used.
TS=(COLD,3) Cold start temporary storage.
TST=NO A temporary storage table is not used.
USERTR=ON Auxiliary trace - enable user trace.
XAPPC=NO RACF® checking of APPC sessions.
TCPIP=YES Activate CICS TCPIP services.
XCMD= {YES|name|NO} Indicate whether EXEC CICS system commands are to be included in security checking.
XDB2= {No|name} Indicate whether Db2® resources are to be included in security checking.
XDCT=NO RACF checking of transient data queues.
XFCT= {YES|name|NO} Indicate whether files are to be included in security checking.
XHFS=NO Security checking of Web client access to z/OS UNIX files.
XPCT= NO RACF checking of EXEC-started transactions.
XPPT= {YES|name|NO} Indicate whether programs are to be included in security checking.
XRES=NO Security checking of access to CICS resources subject to XRES security checks. For a list of resources subject to XRES security checks, see Security using the XRES resource security parameter.
XRF=NO XRF support is not generated.
XPSB=NO RACF checking of DL/I PSBs.
XTRAN=NO RACF checking of transaction-attach.
XTST=NO RACF checking of temporary storage queues.
XUSER={YES|NO} Indicates whether CICS is to perform surrogate user checks. If you specify YES, you must define the CICS region user ID as a surrogate of the user ID that starts a MAS using the COLM or CORM transaction.