| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Mladen Gogala <mladen(dot)gogala(at)vmsinfo(dot)com> |
| Cc: | Greg Smith <greg(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "david(at)lang(dot)hm" <david(at)lang(dot)hm>, Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>, Vitalii Tymchyshyn <tivv00(at)gmail(dot)com>, "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] Slow count(*) again... |
| Date: | 2011-02-03 16:57:30 |
| Message-ID: | 201102031657.p13GvUc09567@momjian.us |
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| Lists: | pgsql-hackers pgsql-performance |
Mladen Gogala wrote:
> Hints are not even that complicated to program. The SQL parser should
> compile the list of hints into a table and optimizer should check
> whether any of the applicable access methods exist in the table. If it
> does - use it. If not, ignore it. This looks to me like a philosophical
> issue, not a programming issue. Basically, the current Postgres
> philosophy can be described like this: if the database was a gas stove,
> it would occasionally catch fire. However, bundling a fire extinguisher
> with the stove is somehow seen as bad. When the stove catches fire,
> users is expected to report the issue and wait for a better stove to be
> developed. It is a very rough analogy, but rather accurate one, too.
That might be true.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
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