For release 4.0 the default size for the lock table is 4 MB. For medium-sized systems this value is absolutely sufficient. As of 4.6, it appears that a size of 10-20 MB is required for some background jobs, and a size of 32-200 MB may be required for large systems, although this is the exception. As a lock table that is too small causes transaction terminations, but resources for the lock table are relatively low, a size of 20 MB should be specified initially. no further changes are generally required to the layout of the shared memories with this size (except for AIX 32 bit). You can enter this setting using the profile parameter: enque/table_size = 20000
You can monitor the lock table in transaction SM12 via the menu option "Extras -> Statistics".
The lock table is a shared memory, not a database table.
