On Thu, Nov 6, 2008 at 8:07 AM, Scott Marlowe <scott.marlowe@xxxxxxxxx> wrote: > On Thu, Nov 6, 2008 at 8:47 AM, David Rees <drees76@xxxxxxxxx> wrote: >> >> In the case of the machines without a BBU on them, they are configured >> to be in WriteBack, but are actually running in WriteThrough. > > I'm pretty sure the LSIs will refuse to actually run in writeback without a BBU. It's configurable (at least on the MegaRAID cards I'm using). There's an option you can turn on that lets you run in writeback when the BBU is offline. -Dave -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
