wal files on temporary tables

folks

I have a asp application connected with postgres.
The postgres temporary tables is useless because i
need remain this tables between sessions, perfomance
reasons.
This tables are created on the fly and remain between
session but asp server finalize connection and
temporary table are dropped .
Then i've created "normal" tables but the wal file
generated by this tables grows and grows.
This wal file ares useless , temporary information
here.
what is the way to not generate wal files for this
tables? to identify these archives not to put them in
backup
Any clue?
best regards
MDC

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