Many "loaded library" logs by preload libraries

Hi,

If we set shared_preload_libraries or local_preload_libraries to
load some modules, "loaded library" messages are logged in server
log every new connections and autovacuum workers.
   LOG:  loaded library "pg_stat_statements"

Messages by shared_preload_libraries are logged only once
on non-EXEC_BACKEND platforms, but many times on Windows.
On the other hand, local_preload_libraries outputs logs
meny times in all platforms.

Is it too noisy? How about reducing the log level to DEBUG
and/or logging them only in postmaster?

Regards,
---
ITAGAKI Takahiro
NTT Open Source Software Center