On Wed, 21 Apr 2004 10:01:30 -0700, Qing Zhao [EMAIL PROTECTED]
wrote:
I have recently configured my PG7.3 on a G5 (8GB RAM) with
shmmax set to 512MB and shared_buffer=5, sort_mem=4096
and effective cache size = 1. It seems working great so far but
I am wondering if I should make effctive
Hi,
You should try the next queries:
select support_person_id from ticket_crm_map where crm_id = 7 GROUP BY
support_person_id;
select support_person_id from ticket_crm_map where crm_id = 1 GROUP BY
support_person_id;
It can use the 'ticket_crm_map_crm_id_suppid' index.
Generally the Postgres
Hi,
I came across a very intriguing thing:
I had to join two tables and in both tables I wanted to restrict the
result set by some (text/varchar) attributes.
Here is an example:
Table item # 147 000 entries
Column | Type | Modifiers
Dave,
Are you testing this with Tom's code, you need to do a baseline
measurement with 10 and then increase it, you will still get lots of cs,
but it will be less.
No, that was just a test of 1000 straight up.Tom outlined a method, but I
didn't see any code that would help me find a
On Mon, 26 Apr 2004, Rob Fielding wrote:
scott.marlowe wrote:
On Fri, 23 Apr 2004, Chris Hoover wrote:
DB's on Powervaults 220S using raid 5 (over 6 disks)
What controller is this, the adaptec? We've found it to be slower than
the LSI megaraid based controller, but YMMV.
Josh,
I think you can safely increase by orders of magnitude here, instead of
by +100, my wild ass guess is that the sweet spot is the spin time
should be approximately the time it takes to consume the resource. So if
you have a really fast machine then the spin count should be higher.
Also you
Dave,
But... you need a baseline first.
A baseline on CS? I have that
--
-Josh Berkus
Aglio Database Solutions
San Francisco
---(end of broadcast)---
TIP 7: don't forget to increase your free space map settings
Hello pgsql-performance,
I discussed the whole subject for some time in DevShed and didn't
achieve much (as for results). I wonder if any of you guys can help
out:
http://forums.devshed.com/t136202/s.html
Regards,
Vitaly Belman
ICQ: 1912453
AIM: VitalyB1984
MSN: [EMAIL PROTECTED]
Vitaly Belman wrote:
Hello pgsql-performance,
I discussed the whole subject for some time in DevShed and didn't
achieve much (as for results). I wonder if any of you guys can help
out:
http://forums.devshed.com/t136202/s.html
So cutting and pasting:
- SCHEMA -
CREATE TABLE
Hi,
You can try some variation:
SELECT
book_id
FROM
bookgenres, genre_children
WHERE
bookgenres.genre_id = genre_children.genre_child_id AND
genre_children.genre_id = 1
GROUP BY book_id
LIMIT 10
The next works if the 'genre_child_id' is UNIQUE on the 'genre_children'
table.
On Tue, 2004-04-27 at 17:27, Vitaly Belman wrote:
Hello pgsql-performance,
I discussed the whole subject for some time in DevShed and didn't
achieve much (as for results). I wonder if any of you guys can help
out:
http://forums.devshed.com/t136202/s.html
You're taking the wrong
[EMAIL PROTECTED] writes:
... Wouldn't the most efficient plan be to scan the index regardless
of crm_id because the only columns needed are in the index?
No. People coming from other databases often have the misconception
that queries can be answered by looking only at an index. That is
AFAIK, oids aren't used for anything internally, so duplicates don't
really matter. Besides, what would you do about duplicate oid's ?
The best suggestion is of course his last, don't use them.
On Mon, 2004-04-26 at 22:48, Christopher Kings-Lynne wrote:
I am using the oid of the table as the
AFAIK, oids aren't used for anything internally, so duplicates don't
really matter. Besides, what would you do about duplicate oid's ?
If he's using them _externally_, then he does have to worry about
duplicates.
Chris
---(end of broadcast)---
TIP
I am going to use them as primary key of the table, so I'll surely need
them unique :)
Eduoardo, I REALLY suggest you don't use them at all. You should make a
primary key like this:
CREATE TABLE blah (
id SERIAL PRIMARY KEY,
...
);
Also note that by default, OIDs are NOT dumped by pg_dump.
15 matches
Mail list logo
