# PostgreSQL writes tuple-descriptor padding while constructing its relcache
# initialization file. The bytes are not read as data; suppress only the write
# path rooted at RelationCacheInitializePhase3.
{
   postgresql_relcache_tupledesc_padding
   Memcheck:Param
   write(buf)
   fun:write
   fun:_IO_file_write*
   fun:new_do_write
   fun:_IO_do_write*
   fun:_IO_new_file_xsputn
   fun:_IO_file_xsputn*
   fun:fwrite
   ...
   fun:RelationCacheInitializePhase3
   fun:InitPostgres
}

# PostgreSQL WAL records can contain allocator padding. Suppress only the
# pwrite buffer warning that reaches the WAL flush boundary.
{
   postgresql_wal_record_padding
   Memcheck:Param
   pwrite64(buf)
   fun:pwrite
   ...
   fun:XLogFlush
}