| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Joel Jacobson <joel(at)trustly(dot)com> |
| Cc: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_stat_*_columns? |
| Date: | 2015-06-08 16:48:52 |
| Message-ID: | CA+TgmoY+_XNVovVNK=vPAXQTdnjqxA1PxzwKWUzkXBhy90cRGg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Jun 5, 2015 at 7:51 AM, Joel Jacobson <joel(at)trustly(dot)com> wrote:
> Would others find it useful to see per column statistics about accesses to
> specific columns?
A probably serious and maybe not entirely obvious problem with this is
that it would increase the amount of statistical information we keep
by a pretty large multiple. How many columns do you have in a typical
table? 20-30? That's a lot of data for a statistics collector that,
regrettably, is already overloaded.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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