This subsection describes the parameters that are applicable to logical performance tracers.

The following table describes the parameters that are applicable to logical performance tracers. In the following table, Default value is the value that is assumed when a parameter is not specified. VR is the version of Application Server on which parameters are introduced or changed.

Table 4-93 Parameters applicable to logical performance tracers

Value of param-name	Value of param-value	Specifiable value	Default value	VR
PRFID	Specify the PRF identifier.	If a string beginning with 'TSC', 'tsc' or 'CTM' and 'ctm' is specified, an error will occur.	PRF_ID	06-50 07-00
prfspool	Specifies the PRF trace output directory. In Windows, the value specified here must match with the value specified in the system environment variable PRFSPOOL.	Specify any string with a maximum of 256 characters.	&{cosminexus.home}/PRF/spool	06-50 07-00
PrfTraceBufferSize	Specifies the size of the buffer memory for the performance tracer. Specify a value that satisfies the condition PrfTraceFileSize PrfTraceBufferSize.	Specify the value using an integer from 512 to 102400.	8192	06-50
PrfTraceCount	Specifies the number of files for the performance tracer.	Specify 4, 16, 32, 64, 128, or 256.	4	06-50
PrfTraceFileSize	Specifies the file size for the performance tracer in Kilobytes. Specify a value that satisfies the condition PrfTraceFileSize PrfTraceBufferSize.	The following strings can be specified: 1024 4096 8192 16384 32768 65536 131072 262144 524288 1048576	32768	06-50 07-00
PrfTraceLevel	Specifies the trace collection level for the performance tracer. Set up one of the following values: STANDARD: Standard level DETAIL: Detail level Optional trace collection level value: For details about specifiable values, see the description for the argument -PrfTraceLevel of the cprfstart (PRF daemon startup) command in the uCosminexus Application Server Command Reference Guide.	The following strings can be specified: STANDARD DETAIL Any trace level value	STANDARD	06-50 07-00