On Mon, 23 Nov 2009, Lorenzo Allegrucci wrote:
Anyway, how can I get rid those idle in transaction processes?
Can I just kill -15 them or is there a less drastic way to do it?
Are you crazy? Sure, if you want to destroy all of the changes made to the
database in that transaction and
Dear All.
Can any one give me dynamic sql in postgres stored procedure using USING
CLAUSE
Regards,
Ram
2009/11/24 ramasubramanian ramasubramania...@renaissance-it.com:
Dear All.
Can any one give me dynamic sql in postgres stored procedure using
USING CLAUSE
CREATE TABLE tab(a integer);
CREATE OR REPLACE FUNCTION foo(_a integer)
RETURNS void AS $$
DECLARE r record;
BEGIN
FOR r IN EXECUTE
Hello,
I've run in a severe performance problem with the following statement:
DELETE FROM t1 WHERE t1.annotation_id IN (
SELECT t2.annotation_id FROM t2)
t1 contains about 48M record (table size is 5.8GB), while t2 contains about 60M
record (total size 8.6GB). annotation_id is the PK in
On Tue, Nov 24, 2009 at 3:59 PM, Jerry Champlin
jchamp...@absolute-performance.com wrote:
You may want to consider using partitioning. That way you can drop the
appropriate partition and never have the overhead of a delete.
Hum, I don't think it's doable in my case; the partitioning is not
2009/11/24 Luca Tettamanti kronos...@gmail.com
On Tue, Nov 24, 2009 at 3:59 PM, Jerry Champlin
jchamp...@absolute-performance.com wrote:
You may want to consider using partitioning. That way you can drop the
appropriate partition and never have the overhead of a delete.
Hum, I don't
You may want to consider using partitioning. That way you can drop the
appropriate partition and never have the overhead of a delete.
Jerry Champlin|Absolute Performance Inc.|Mobile: 303-588-2547
-Original Message-
From: pgsql-performance-ow...@postgresql.org
Matthew Wakeling wrote:
On Mon, 23 Nov 2009, Lorenzo Allegrucci wrote:
Anyway, how can I get rid those idle in transaction processes?
Can I just kill -15 them or is there a less drastic way to do it?
Are you crazy? Sure, if you want to destroy all of the changes made to
the database in that
On Tue, Nov 24, 2009 at 3:19 PM, Thom Brown thombr...@gmail.com wrote:
2009/11/24 Luca Tettamanti kronos...@gmail.com
On Tue, Nov 24, 2009 at 3:59 PM, Jerry Champlin
jchamp...@absolute-performance.com wrote:
You may want to consider using partitioning. That way you can drop the
On Tue, 24 Nov 2009, Denis Lussier wrote:
IMHO the client application is already confused and it's in Prod.
Shouldn't he perhaps terminate/abort the IDLE connections in Prod and
work on correcting the problem so it doesn't occur in Dev/Test??
The problem is, the connection isn't just IDLE - it
On Tuesday 24 November 2009, Thom Brown thombr...@gmail.com wrote:
It's a shame there isn't a LIMIT option on DELETE so this can be done in
small batches.
delete from table where pk in (select pk from table where delete_condition
limit X);
--
No animals were harmed in the recording of this
We're about to purchase a new server to store some of our old databases,
and I was wondering if someone could advise me on a RAID card. We want to
make a 6-drive SATA RAID array out of 2TB drives, and it will be RAID 5 or
6 because there will be zero write traffic. The priority is stuffing as
Matthew Wakeling wrote:
We're about to purchase a new server to store some of our old databases,
and I was wondering if someone could advise me on a RAID card. We want
to make a 6-drive SATA RAID array out of 2TB drives, and it will be RAID
5 or 6 because there will be zero write traffic.
On Nov 24, 2009, at 9:23 AM, Matthew Wakeling wrote:
We're about to purchase a new server to store some of our old
databases, and I was wondering if someone could advise me on a RAID
card. We want to make a 6-drive SATA RAID array out of 2TB drives,
and it will be RAID 5 or 6 because there
- Richard Neill rn...@cam.ac.uk escreveu:
Matthew Wakeling wrote:
We're about to purchase a new server to store some of our old
databases,
and I was wondering if someone could advise me on a RAID card. We
want
to make a 6-drive SATA RAID array out of 2TB drives, and it will be
On Tue, Nov 24, 2009 at 10:23 AM, Matthew Wakeling matt...@flymine.org wrote:
We're about to purchase a new server to store some of our old databases, and
I was wondering if someone could advise me on a RAID card. We want to make a
6-drive SATA RAID array out of 2TB drives, and it will be RAID
Since I'm currently looking at upgrading my own database server, maybe some
of the experts can give a comment on one of the following controllers:
- Promise Technology Supertrak ES4650 + additional BBU
- Adaptec RAID 5405 SGL/256 SATA/SAS + additional BBU
- Adaptec RAID 5405Z SGL/512 SATA/SAS
On Tue, Nov 24, 2009 at 12:28 PM, Jochen Erwied
joc...@pgsql-performance.erwied.eu wrote:
Since I'm currently looking at upgrading my own database server, maybe some
of the experts can give a comment on one of the following controllers:
- Promise Technology Supertrak ES4650 + additional BBU
Lorenzo Allegrucci escribió:
Matthew Wakeling wrote:
On Mon, 23 Nov 2009, Lorenzo Allegrucci wrote:
Anyway, how can I get rid those idle in transaction processes?
Can I just kill -15 them or is there a less drastic way to do it?
Are you crazy? Sure, if you want to destroy all of the changes
Gurgel, Flavio escribió:
- Richard Neill rn...@cam.ac.uk escreveu:
Matthew Wakeling wrote:
We're about to purchase a new server to store some of our old
databases,
and I was wondering if someone could advise me on a RAID card. We
want
to make a 6-drive
On Tue, Nov 24, 2009 at 1:37 PM, Ing. Marcos Ortiz Valmaseda
mlor...@uci.cu wrote:
Do you expose that performance issued caused by RAID 5? Because this is one
of our solutions here on my country to save the data of our PostgreSQL
database. Which model do you recommend ? RAID 0,RAID 1, RAID 5 or
Tuesday, November 24, 2009, 9:05:28 PM you wrote:
Have you searched the -performance archives for references to them?
I'm not that familiar with Adaptec RAID controllers. Not requiring a
battery check / replacement is nice.
Either I searched for the wrong terms, or there isn't really that
- Scott Marlowe scott.marl...@gmail.com escreveu:
On Tue, Nov 24, 2009 at 1:37 PM, Ing. Marcos Ortiz Valmaseda
mlor...@uci.cu wrote:
Do you expose that performance issued caused by RAID 5? Because this
is one
of our solutions here on my country to save the data of our
PostgreSQL
On Tue, Nov 24, 2009 at 1:59 PM, Jochen Erwied
joc...@pgsql-performance.erwied.eu wrote:
Tuesday, November 24, 2009, 9:05:28 PM you wrote:
Have you searched the -performance archives for references to them?
I'm not that familiar with Adaptec RAID controllers. Not requiring a
battery check /
The problem with RAID-5 or RAID-6 is not the normal speed operation, it's
the degraded performance when there is a drive failure. This includes
read-only scenarios. A DB server getting any kind of real use will
effectively appear to be down to client apps if it loses a drive from that
RAID set.
Tuesday, November 24, 2009, 10:34:00 PM you wrote:
Aberdeen is the builder I use. They'll put any card in you want
(within reason) including our preference here, Areca. Perhaps you
meant Areca?
I knew Areca only for their internal arrays (which one of our customers
uses for his 19 systems),
Jochen Erwied wrote:
Tuesday, November 24, 2009, 10:34:00 PM you wrote:
Aberdeen is the builder I use. They'll put any card in you want
(within reason) including our preference here, Areca. Perhaps you
meant Areca?
I knew Areca only for their internal arrays (which
Even though the column in question is not unique on t2 could you not
index it? That should improve the performance of the inline query.
Are dates applicable in any way? In some cases adding a date field,
partitioning or indexing on that and adding where datex days. That
can be an
Matthew Wakeling wrote:
People have mentioned Areca as making good RAID controllers. We're
looking at the Areca ARC-1220 PCI-Express x8 SATA II as a
possibility. Does anyone have an opinion on whether it is a turkey or
a star?
Performance should be OK but not great compared with some of the
Scott Marlowe wrote:
As far as drives go we've been really happy with WD of late, they make
large enterprise class SATA drives that don't pull a lot of power
(green series) and fast SATA drives that pull a bit more but are
faster (black series).
Be careful to note the caveat that you need their
Jochen Erwied wrote:
- Promise Technology Supertrak ES4650 + additional BBU
- Adaptec RAID 5405 SGL/256 SATA/SAS + additional BBU
- Adaptec RAID 5405Z SGL/512 SATA/SAS
I've never seen a Promise controller that had a Linux driver you would
want to rely on under any circumstances. Adaptec
On Tue, Nov 24, 2009 at 7:35 PM, Greg Smith g...@2ndquadrant.com wrote:
Scott Marlowe wrote:
As far as drives go we've been really happy with WD of late, they make
large enterprise class SATA drives that don't pull a lot of power
(green series) and fast SATA drives that pull a bit more but
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