Why lots of temp schemas are being created

Dear all,

Our software use postgres as backend database. It works fine, strange thing is that, it creates so many temporary schemas under schema tab, names like pg_toast, pg_toast_temp_1 like this upto pg_toast_temp40. This schemas also reflected in "pg_namespace" table. Can anybody tell me, is there anything wrong in it? Should I get rid of these temporary schemas? Any suggestion on this, please.

--- Thanks & Reagrds ----
Anirban Pal

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