Does any one know what cause this DBD::Oracle problem?

[Kong, Alan]

Hi everyone,
 
I'm trying to run the test program to connect to Oracle database, but it
gave me the following message:
 
Out of memory during "large" request for 1073745920 bytes at
/opt/perl5/lib/site_perl/5.6.0/PA-RISC1.1/DBD/Oracle.pm line 262.
 
Does any one know what causing this?
 
The query statement is just like "select user from dual".
 
Thanks for you help.