diff -rpcd a/src/backend/postmaster/autovacuum.c b/src/backend/postmaster/autovacuum.c
*** a/src/backend/postmaster/autovacuum.c	2014-07-17 21:17:04.000000000 +0900
--- b/src/backend/postmaster/autovacuum.c	2014-07-18 22:52:26.802934100 +0900
*************** do_autovacuum(void)
*** 2076,2082 ****
  				}
  				else
  				{
! 					ereport(LOG,
  							(errmsg("autovacuum: found orphan temp table \"%s\".\"%s\" in database \"%s\"",
  								 get_namespace_name(classForm->relnamespace),
  									NameStr(classForm->relname),
--- 2076,2082 ----
  				}
  				else
  				{
! 					ereport(DEBUG1,
  							(errmsg("autovacuum: found orphan temp table \"%s\".\"%s\" in database \"%s\"",
  								 get_namespace_name(classForm->relnamespace),
  									NameStr(classForm->relname),