two datebases with one delegator issue

[wudongqing-2]

hi all,
I have two databases connected one ofbiz,using the default delegator, and in one database, I always get an OutOfMemory error when I using (Entity Data Maintenance) tool near (Entity Engine Tools)  in Web Tools to find all the data in one table which has about 400,000 records.
It seems that the limitation doesn't work.

thanks for any response