| From: | "David Rees" <drees76(at)gmail(dot)com> |
|---|---|
| To: | "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | "Peter Schuller" <peter(dot)schuller(at)infidyne(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Occasional Slow Commit |
| Date: | 2008-11-06 18:46:56 |
| Message-ID: | 72dbd3150811061046w4fdcd9bbnf78459b9dffd566d@mail.gmail.com |
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| Lists: | pgsql-performance |
On Thu, Nov 6, 2008 at 8:07 AM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> wrote:
> On Thu, Nov 6, 2008 at 8:47 AM, David Rees <drees76(at)gmail(dot)com> 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
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