Обсуждение: WAL

Greetings,
Turning of fsync does not mean turn off WAL as well? So why does the
xlog files (pg_xlog) still being recycled?

I'm using postgresql 8.0.2.

Thanks.

Dextra - Gustavo Bartz Guedes wrote:
> Greetings,
> Turning of fsync does not mean turn off WAL as well? So why does the
> xlog files (pg_xlog) still being recycled?

No, fsync only is used for server crashes.  WAL is still used to recover
from database crashes when the operating system keeps running.  We write
to WAL on commit but not to the file system on commit, and WAL cleans
that up.

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