LOG_BUFFER

LOG_BUFFER specifies the amount of memory (in bytes) that Oracle uses when buffering redo entries to a redo log file. Redo log entries contain a record of the changes that have been made to the database block buffers. Oracle Hyperion Financial Management is a high-update transactional system, and the database constantly uses log buffer. Properly sizing the log buffer can improve the database performance. In general, larger values for LOG_BUFFER reduce redo log file I/O, particularly if transactions are long or numerous. If the buffer is too small, the system waits until the buffer is clear before adding new updates, so it is important to set this buffer correctly to improve database performance.

Suggested setting: Start with 8 MB. Refer to How to Determine Memory Settings for Oracle Database Release 11g.