Invalid WAL segment size. Allowed values are 1,2,4,8,16,32,64

Hi,
We have a big problem with managing the number of WAL products, during database activity, so I would try to write to you.
With pg_rman utility, we can't save thousands of WAL files every few hours, to be used for a possible recovery.
We are using a production environment 9.2 PostgreSQL server which processes a database of about 260 GB
Is there a way to fix "wal_segsize" to about 1 Gb in 9.2. version, and "rebuild" postgreSQL server?
The goal is to drastically reduce the number of WALs.

Upgrading to 9.5, is the only way to fix this issue?

Thank you.

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Gianfranco Cocco
Gruppo DBA Torino
Managed Operations - Data Center Factory
gianfranco(dot)cocco(at)eng(dot)it<mailto:gianfranco(dot)cocco(at)eng(dot)it>
Engineering.MO S.p.A
Corso Mortara, 22 - 10149 Torino
Tel. 011 19449548 (SHORT CODE: 676548)
www.eng.it<http://www.eng.it>

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