From: | hewei <heweiweihe(at)gmail(dot)com> |
---|---|
To: | "Webb Sprague" <webb(dot)sprague(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: How to make update rapidly? |
Date: | 2008-02-20 04:03:20 |
Message-ID: | 4279588b0802192003h7245de7dw4314518a9e943b41@mail.gmail.com |
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Thread: | |
Lists: | pgsql-general |
table:
CREATE TABLE price (
TIMESTAMP Timestamp NULL,
id numeric(5,0) NOT NULL,
price numeric(10,3) NULL,
primary key (id)
);
sql:
update price set price=* where id=*;
On Feb 20, 2008 11:56 AM, Webb Sprague <webb(dot)sprague(at)gmail(dot)com> wrote:
> Post the table, the query, and the explain output, and then we can help
> you.
>
> On Feb 19, 2008 7:38 PM, hewei <heweiweihe(at)gmail(dot)com> wrote:
> > Hi,Every body;
> > I have a table contains 100,000 rows, and has a primary key(int).
> > Now ,I need to execute sql command like "update .......... where
> id=*"(id
> > is primary key).
> > I expect execute 1200-1600 sqlcommands per second(1200-1600/s).
> > In test,when the id increase by degrees in sqlcommands, then I can
> reach
> > the speed(1600/s);
> > But in fact , the id in sqlcommands is out of rule, then the speed
> is
> > very slow, just 100/s.
> > what can i do? can you help me ?
> >
>
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