Tom Lane wrote:
> Bruce Momjian <bruce@momjian.us> writes:
> > Patch applied. Thanks.
>
> Wait a minute. This patch changes the behavior so that
> LockBufferForCleanup is applied to *every* heap page, not only the ones
> where there are removable tuples. It's not hard to imagine scenarios
> where that results in severe system-wide performance degradation.
> Has there been any real-world testing of this idea?
I see the no-index case now:
+ if (nindexes)
+ LockBuffer(buf, BUFFER_LOCK_SHARE);
+ else
+ LockBufferForCleanup(buf);
Let's see what Greg says, or revert.
--
Bruce Momjian bruce@momjian.us
EnterpriseDB http://www.enterprisedb.com
+ If your life is a hard drive, Christ can be your backup. +