ERROR: out of shared memory

Hello!

I have to manage an application written in java which call another module
written in java which uses Postgre DBMS in a Linux environment. I'm new to
Postgres. The problem is that for large amounts of data the application
throws an:

org.postgresql.util.PSQLException: ERROR: out of shared memory

Please, have you any idea why this error appears and what can I do in order
to fix this?

Are there some Postgre related parameters I should tune (if yes what
parameters) or is something related to the Linux OS?

Thank you very much

With best regards,

Sorin