| From: | "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com> |
|---|---|
| To: | josh(at)agliodbs(dot)com |
| Cc: | pgsql-hackers(at)postgresql(dot)org, "Mike Rylander" <mrylander(at)gmail(dot)com>, "Qingqing Zhou" <zhouqq(at)cs(dot)toronto(dot)edu> |
| Subject: | Re: Support Parallel Query Execution in Executor |
| Date: | 2006-04-08 01:00:13 |
| Message-ID: | 36e682920604071800q4200331fp9828f1840870aa83@mail.gmail.com |
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| Lists: | pgsql-hackers pgsql-patches |
On 4/7/06, Josh Berkus <josh(at)agliodbs(dot)com> wrote:
> So even on a single seq scan, parallel query
> execution would make a significant difference
> in performance, possibly as
> much as +75% on seq scans of large tables.
I've been looking at several commercial systems which employ dynamic
partitioning for sequential scans of large tables. While 75% sounds a
little optimistic, there is most definitely a sizable performance
increase.
--
Jonah H. Harris, Database Internals Architect
EnterpriseDB Corporation
732.331.1324
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