Lock Table Overflow

SAP 4.7 6.20 - Windows Server 2008 - Oracle 10g

I have many error messages in tx sm21 :

GEG Lock Table Overflow

GEA Internal lock administration error

GZZ EqSetCluster() ; rsc=16 enxxmenq1905

The error happens countinuasly for 8-9-10 minutes and then everything returns to normal.

No dumps in st22, but some jobs lose the schedule. I need to reschedule some of them.

I was informed by some consultants that the transaction VT02N is using an average of 28500 lock entries by user.

The value of the parameter enque/table_size is 30000.

But the consultants say that we should not increase this value.

Because VT02N has a lot of customizations here, we should investigate the program.

I had never seen this error before, so I need some help to understand the situation better.

I've already read a lot of ducumentation and the more I read the more I get confused.

1) What kind of lock is that ? There is not so many lock messages in tx sm12. And there is nothing in tx db01.

2) What kind of mistake could someone do in a program / exit / include to produce these errors ?

3) How could I discover if a program is really producing so many locks ?

Thanks in advance,


  • SAP Moderator


When you face this problem, then you can go to SM12 and then go to Extras --> Top Capacity used. There you can find out which user is trying to lock which table and have maximum locks. And then you can troubleshoot more.

You can check SAP note 746138 for troubleshooting on lock table overflow. Also, check below thread:

Lock table overflow (enque/table_size)



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