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:

Is this data still applicable to the revised patch?


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