Re: Idea for getting rid of VACUUM FREEZE on cold pages

Robert Haas <robertmhaas@gmail.com> writes:
> On Fri, Jun 4, 2010 at 11:45 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> The reason for not recommending cassert in production builds is not
>> cost but stability.

> We routinely castigate people for benchmarking done with cassert
> turned on, and tell them their numbers are meaningless.

I didn't say it wasn't expensive ;-).  But Kevin's question seemed to
be based on the assumption that runtime cost was the only negative.
It wouldn't be terribly hard to make a variant of cassert that skips
two or three of the most expensive things (particularly memory context
checking and CLOBBER_FREED_MEMORY), and from a cost perspective that
would be totally reasonable to run in production.  We haven't done it
because of the stability issue.
        regards, tom lane