| From: | "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
|---|---|
| To: | "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>, "Bruce Momjian" <bruce(at)momjian(dot)us> |
| Cc: | <jd(at)commandprompt(dot)com>, "Steve Crawford" <scrawford(at)pinpointresearch(dot)com>, <pgsql-performance(at)postgresql(dot)org>, "Ben Chobot" <bench(at)silentmedia(dot)com> |
| Subject: | Re: BBU Cache vs. spindles |
| Date: | 2010-10-21 16:56:02 |
| Message-ID: | 4CC02A520200002500036C14@gw.wicourts.gov |
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| Lists: | pgsql-performance pgsql-www |
Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> With a BBU you can turn off full_page_writes
My understanding is that that is not without risk. What happens if
the WAL is written, there is a commit, but the data page has not yet
been written to the controller? Don't we still have a torn page?
-Kevin
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