javascript/TraceSize is a SAP Parameter attribute which is used to control CL_JAVA_SCRIPT: max. Size of Tracefiles in Bytes information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
You use this parameter to set the maximum size of log files of class
CL_JAVA_SCRIPT (javascript/TraceLevel). If the file size in bytes
exceeds this value, the current trace file ( dev_js_%wp_id% ) is renamed
to a backup file ( dev_js_%wp_id%.old ). Any existing backup file is
discarded.
Note
Make sure there is enough space. The trace mechanism needs the following
amount of disk storage:
Total =
(Max. size) *
(Number of work processes) *
2; /* Log file and backup file */
See SAP Parameter Documentation for full SAP documentation for this profile parameter.