Command line recall.
Two comma-separated values configure command line recall features.
Maximum number of entries held in the command line/read line recall buffer, subject to the space limitation in the second parameter. The range is 0256 entries. The default is 32 entries.
Total size (in bytes) of all input strings to be stored in the command line/read line buffer. The range is 08192 bytes. The default is 1024 bytes.
Range of Values
If you want history=a,b
you can use the portal to set these values as follows: