ITAGAKI Takahiro wrote:
The patch adds a new choice "open_direct" to wal_sync_method. It uses O_DIRECT flags for WAL writes, like O_SYNC.
Have you looked at what the performance difference of this option is? For example, these benchmark results seem to indicate that an older version of the patch is not a performance win, at least for OSDL's workload:
http://www.mail-archive.com/pgsql-patches@postgresql.org/msg07186.html Is this data still applicable to the revised patch? -Neil ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
