If the following error occurs when you start
mysqld after upgrading, it means that the
current version of
BDB doesn't support
the old log file format:
bdb: Ignoring log file: .../log.
NNNNNNNNNN: unsupported log version #
In this case, you must delete all
logs from your data directory (the files that have names of
and restart mysqld. We also recommend
that you then use mysqldump --opt to dump
BDB tables, drop the tables, and
restore them from the dump file.
If autocommit mode is disabled and you drop a
BDB table that is referenced in another
transaction, you may get error messages of the following
form in your MySQL error log:
001119 23:43:56 bdb: Missing log fileid entry 001119 23:43:56 bdb: txn_abort: Log undo failed for LSN: 1 3644744: Invalid
This is not fatal, but the fix is not trivial. Avoid
BDB tables except while
autocommit mode is enabled.