Re: Why our counters need to be time-based WAS: WIP: cross column correlation ...

Josh Berkus <josh@agliodbs.com> writes:
> On 2/28/11 10:24 AM, Robert Haas wrote:
>> On Mon, Feb 28, 2011 at 1:04 PM, Josh Berkus <josh@agliodbs.com> wrote:
>>> On the other hand, anything which increases the size of pg_statistic
>>> would be a nightmare.

>> Hmm?

> Like replacing each statistic with a series of time-based buckets, which
> would then increase the size of the table by 5X to 10X.  That was the
> first solution I thought of, and rejected.

I think Josh is thinking of the stats collector's dump file, not
pg_statistic.

Ultimately we need to think of a reporting mechanism that's a bit
smarter than "rewrite the whole file for any update" ...
        regards, tom lane