Each time Adaptive Server starts it begins to write information to a local error log file, called the Adaptive Server error log.
$SYBASE/install/errorlog
This file:
Stores information about the success or failure of each start-up attempt.
Logs error and informational messages generated by the server during its operations.
Remains open until you stop the server process.
Retains its contents until you rename, move, or empty the file.
When you want to make more memory available by reducing the size of the error log, stop Adaptive Server before deleting logged messages. The log file cannot release its memory space until Adaptive Server has stopped.