func: static void PgstatCollectorMain(int argc,char *argv[]) pgStatDBHash = pgstat_read_statsfile ( ( ( Oid ) 0 ) , ( ( bool ) 1 ) ); static HTAB *pgstat_read_statsfile(Oid onlydb,bool permanent) FILE * fpin ; int32 format_id ; const char * statfile = ( permanent ? "global/pgstat.stat" : pgstat_stat_filename ) ; globalStats . stat_reset_timestamp = GetCurrentTimestamp ( ); if ( ( fpin = AllocateFile ( statfile , "r" ) ) == ( ( void * ) 0 ) )  if ( fread ( ( & format_id ) , 1 , sizeof ( format_id ) , fpin ) != sizeof ( format_id ) || format_id != 0x01A5BC9A )  if ( fread ( ( & globalStats ) , 1 , sizeof ( globalStats ) , fpin ) != sizeof ( globalStats ) )  