Default trace options required by the Health Checker (HC)

The objective of the IBM Health Checker for z/OS is to identify potential problems before they impact your availability or, in worst cases, cause outages. It checks the current active z/OS and sysplex settings and definitions for a system and compares the values to those suggested by IBM or defined by you. For more details see IBM Health Checker for z/OS User's Guide. The Health Checker checks whether NFS Component Trace starts with options, defined in the appropriate CTINFSnn /CTINFCnn parmlib member, other than the default options. Starting NFS CTRACE with other options can result in performance degradation.

If the Health Checker detects a mismatch, the application startup name is listed in message IEAH844I in the HEALTH CHECKER's SDSF panel. Note that this message does not mean that the IBM Health Checker for z/OS has found problems that you need to report to IBM! The IBM Health Checker for z/OS output messages simply inform you of potential problems so that you can take action on your installation. To adjust the set of trace options in accordance with HC requirements you can do the following:

Correct a set of trace options in the CTINFxnn parmlib member
2. Switch off trace activity by the operator command:
```
TRACE CT,OFF,COMP=startup_name
```
Note: Trace system stays working in MIN state.

Switch on tracing by operator command:

TRACE CT,ON,COMP=startup_name, PARM=CTINFxnn

The default trace options should be set in a strictly defined order. The syntax of the OPTIONS parameter in the parmlib member allows defining trace options, as follows:

As a string enclosed in quotes. For example:
```
OPTIONS('INFO,WARNING,ERROR ,FFDC ')
```
A set of strings placed in one line. For example:
```
OPTIONS('INFO', 'WARNING', 'ERROR, 'FFDC')
```

A set of strings in consecutive line order. For example:

OPTIONS(
    'INFO'
   ,'WARNING'
   ,'ERROR'
   ,'FFDC’ 		
   )