Error locking table TBTCO

Question

Hi,
We are having issue in locking "Error locking table TBTCO" at our SM12 statics Maximum Number of Lock Owners     3603
Even on increasing the enque/table_size it not effecting the lock owner. Our environment having enq replication server.
The profile parameter for enque/serverinst = $(SCSID) (00)
enque replication server instance number is 10
What could be the correction need to be done?
Regards,
RMav

Answer 1

You have to check the reason for the error in the lock.
Get the Work Process number that logged the error in SM21. Check the trace file of this work proces. At the same timestamp of the error in SM21 you do find the root cause in the work process trace.
Usually this is caused by a overflow in the enqueue table, but not always. For this reason you have to check the work process trace the reasl root cause.
To check if the enqueue is suffering a overflow you should go to SM12 -> Extras -> Statistics
If in the statistics you do find that the "Maximum Fill Level" reached the maximum number of locks in these itens, for example:
Maximum Number of Lock Owners 39481
Maximum Fill level 458                               
Current Fill Level -25
Maximum Number of Lock Arguments 39481  <<<
Maximum Fill level 39480                                 <<<
Current Fill Level 15
Maximum Number of Lock Entries 39481    <<<
Maximum Fill level 39480                             <<<
this means that the enqueue was really suffering under an overflow situation.
Just for your information, the TBCTO is the table for the status of the jobs. So, every job need
to write the status in this table and also lock this table firstly.
Clébio