Smart-large-object log records
When you create a smart large object with the LOG option,
the logical log creates a smart-blob log record. Smart-blob
log records track changes to user data or metadata. When smart large
objects are updated, only the modified portion of the sbpage is in
the log record. User-data log records are created in the logical log
only when logging is enabled for the smart large object.
Warning: Be careful about enabling logging
for smart large objects that are updated frequently. This logging
overhead might significantly slow down the database server.
For information about the log records for smart large objects, see the chapter on interpreting logical-log records in the IBM® Informix® Administrator's Reference.