15 #define DEFAULT_WAL_WRITER_FLUSH_AFTER ((1024 * 1024) / XLOG_BLCKSZ)
#define pg_attribute_noreturn()
PGDLLIMPORT int WalWriterDelay
PGDLLIMPORT int WalWriterFlushAfter
void WalWriterMain(char *startup_data, size_t startup_data_len) pg_attribute_noreturn()