Db2bak side effects on the database

Dear All,
I would like to know what is the impact / side effect of db2bak on the database?
Does it lock the database while running?
Moreover, if you can provide me with more ideas/ info about any other side effects would do me great.
Regards,
Scotty

I am running a stored procedure that uses getXML. I would like to know how much memory its using up. I was told to increase the java pool, but it did not help with large query of getXML. What should I monitor for getXML?
Thanks.

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