Lock list escalations 
Lock list escalations: <count>
The
number of
row
locks in a table is too high. The database system attempts to convert the
row locks into a table lock (see also
Lock
Behavior).
You
can specify the maximum possible number of row locks in the lock list in the
database parameter
MAXLOCKS. The
database system attempts to convert the row lock into a table lock if a
task holds
more than 0,1*MAXLOCKS row locks in a table. If too many escalations occur,
increase the parameter value.
Whether escalations are a problem depends strongly
on the application in question. If escalations occur, check the application to
see whether modifying transactions that lock a lot of rows cannot be corrected
by an interim
COMMIT.