Re: Massive delete performance

> Do you have foreign key relationships that must be followed for cascade
> delete?  If so, make sure that you have indices on them.
Yes I have such things. Indexes are on these fields. >> To be onest this
delete is taking the longest time, but it involves about 10 tables.

> Are you running
> any type of vacuum after the whole process?  What kind?
Full vacuum. (cmd: vacuumdb -f)

Is there any configuration parameter for delete speed up?


----- Original Message -----
From: "Sean Davis" <sdavis2@mail.nih.gov>
To: "Andy" <frum@ar-sd.net>; <pgsql-performance@postgresql.org>
Sent: Tuesday, October 11, 2005 2:54 PM
Subject: Re: [PERFORM] Massive delete performance


> On 10/11/05 3:47 AM, "Andy" <frum@ar-sd.net> wrote:
>
>> Hi to all,
>>
>> I have the following problem: I have a client to which we send every
>> night a
>> "dump" with a the database in which there are only their data's. It is a
>> stupid solution but I choose this solution because I couldn't find any
>> better.
>> The target machine is a windows 2003.
>>
>> So, I have a replication only with the tables that I need to send, then I
>> make
>> a copy of this replication, and from this copy I delete all the data's
>> that
>> are not needed.
>>
>> How can I increase this DELETE procedure because it is really slow???
>> There
>> are of corse a lot of data's to be deleted.
>
> Do you have foreign key relationships that must be followed for cascade
> delete?  If so, make sure that you have indices on them.  Are you running
> any type of vacuum after the whole process?  What kind?
>
> Sean
>
>
>