Each time Adaptive Server starts, it writes information to a local error log file, called the Adaptive Server error log:
$SYBASE/$SYBASE_ASE/install/server_name.log
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
Contains startup messages from Adaptive Server
If the error log become too large, you can:
Dynamically change the path of the error log using sp_errorlog. Once the older errorlog is not being user by Adaptive Server, you can move it, and make space available.
Stop the Adaptive Server and delete logged messages.