There are no Sybase Event Stream Processor configuration settings that directly set up or control RAM usage on the machine. However, ESP reference counts records in the system, ensuring that at most one copy of a record is present in memory, although multiple references to that record may exist in different streams.
Memory usage is directly proportional to the number of records in a project. To limit the amount of memory the entire instance of ESP uses before it reports an out-of-memory condition, use the ulimit command to restrict the amount of memory available to each shell process.