Hi,
On 17 October 2013 02:30, CS DBA cs_...@consistentstate.com wrote:
Anyone have any thoughts on why we would / would not use Mongo for a
reporting environment.
hm.. I wouldn't use anything which doesn't support rich SQL as a
backed for reporting system. In mongo, simple selects are fine but
Hi,
On 23 January 2013 04:57, Rich Shepard rshep...@appl-ecosys.com wrote:
Is there a way I can extract a single table's schema and data from the
full backup? If so, I can then drop the fubar'd table and do it correctly
this time.
You should grep for:
- CREATE TABLE
- COPY
statements and
Hi,
On 14 December 2012 17:56, a...@hsk.hk a...@hsk.hk wrote:
I could see that it would install older PostgreSQL 9.1 and
postgresql-contrib-9.1. As I already have 9.2.1 and do not want to have
older version 9.1 in parallel, I aborted the apt install.
How can I get pure postgresql-contrib
Hi,
On 11 December 2012 06:25, Виктор Егоров vyego...@gmail.com wrote:
On the other hand, it is possible to write whenever sqlerror
continue; and this will make ORACLE to process all the statements
inide the script, ignoring all errors. This is a general feature,
available not only for
Hi,
On 11 December 2012 07:26, Mihai Popa mi...@lattica.com wrote:
First, the project has been started using MySQL. Is it worth switching
to Postgres and if so, which version should I use?
You should to consider several things:
- do you have in-depth MySQL knowledge in you team?
- do you need
Hi,
On 7 December 2012 14:17, a...@hsk.hk a...@hsk.hk wrote:
I have questions about Linux Write cache sizing:
1) /proc/sys/vm/dirty_ratio : current value (default) 20
2) /proc/sys/vm/dirty_background_ratio: current value (default) 10
I am using Ubuntu 12.04 (8GB RAM) and PostgreSQL 9.2.1,
Hi,
On 30 November 2012 08:06, Michael Giannakopoulos miccagi...@gmail.com wrote:
However an aggregate function
feeds me one a tuple for each call, but I would like to have access to a
batch of tuples per function call. Is there any possible way to perform
something like this?
Yes, this
Hi,
On 15 November 2012 23:31, Xiaobo Gu guxiaobo1...@gmail.com wrote:
How can I list all schema names inside a PostgreSQL database through
SQL, especially thoese without any objects created inside it.
Use -E psql's option:
-E, --echo-hiddendisplay queries that internal commands
Hi,
On 5 November 2012 08:39, Chris Angelico ros...@gmail.com wrote:
On Sat, Nov 3, 2012 at 9:15 AM, Joe Van Dyk j...@tanga.com wrote:
Point of random curiosity: The commit mentioned adds the following line:
if (rinfo-reloptions strlen(rinfo-reloptions) 0)
Is there a reason this isn't
Hi,
On 13 October 2012 01:44, Chitra Creta chitracr...@gmail.com wrote:
I currently have a table that is growing very quickly - i.e 7 million
records in 5 days. This table acts as a placeholder for statistics, and
hence the records are merely inserted and never updated or deleted.
Many
Hi,
On 10 October 2012 23:03, Lars Helge Øverland larshe...@gmail.com wrote:
We are now in the process of designing a new component for analytics
and this feature got me thinking we could utilize postgres over other
alternatives like column-oriented databases. Basically we will have a
wide,
Hi,
On 10 October 2012 19:47, Vineet Deodhar vineet.deod...@gmail.com wrote:
3) Can I simulate MySQL's TINYINT data-type (using maybe the custom data
type or something else)
What do you exactly mean? Do you care about storage requirements or
constraints? The smallest numeric type in postgres
Hi,
On 2 October 2012 12:33, Toby Corkindale
toby.corkind...@strategicdata.com.au wrote:
I have a query that joins two views, and takes 28 seconds to run.
However if I create temporary tables that contain the contents of each view,
and then join them, the total time is 1.3 seconds.
try offset
Hi,
On 2 October 2012 13:28, Toby Corkindale
toby.corkind...@strategicdata.com.au wrote:
I have a query that joins two views, and takes 28 seconds to run.
However if I create temporary tables that contain the contents of each
view,
and then join them, the total time is 1.3 seconds.
try
Hi,
On 30 September 2012 16:36, Waldo, Ethan ewa...@healthetechs.com wrote:
Once again I reiterate that I don't have control over the query construction
and I am currently running postgresql 9.1.5. My question is, does
postgresql support transitive pruning optimization on the right side of a
Hi,
On 30 September 2012 16:36, Waldo, Ethan ewa...@healthetechs.com wrote:
My question is, does
postgresql support transitive pruning optimization on the right side of a
join for partition tables? If so, how do I get that to work? If not, are
there plans for this and when should a release
Hi,
On 30 September 2012 21:00, Waldo, Ethan ewa...@healthetechs.com wrote:
Yeah, I actually saw that paper but couldn't find a date on it. Currently
their techniques are well outside
of the scope of my current problem particularly in consideration that I could
switch to MySQL which does
Hi,
On 1 October 2012 01:14, Tom Lane t...@sss.pgh.pa.us wrote:
Waldo, Ethan ewa...@healthetechs.com writes:
This query does a sequence scan and append across all the partition tables:
select dates.date_description FROM myfact as myfact, dates as
dates where myfact.recorded_on_id =
Hi,
On 28 September 2012 04:34, Ryan Kelly rpkell...@gmail.com wrote:
On Thu, Sep 27, 2012 at 08:51:31AM +1000, Ondrej Ivanič wrote:
- aggregation job ran every 15 minutes and completed under 2 minutes:
5mil rows - aggregation - 56 tables
5mil overall, or matching your aggregation query
Hi,
On 26 September 2012 21:50, Ryan Kelly rpkell...@gmail.com wrote:
The size of our database is growing rather rapidly. We're concerned
about how well Postgres will scale for OLAP-style queries over terabytes
of data. Googling around doesn't yield great results for vanilla
Postgres in this
Hi,
On 20 September 2012 20:49, AI Rumman rumman...@gmail.com wrote:
Using explain analyze of a large query I found that in every step there are
a lot difference between the number of rows between actual and estimated.
I am using default_statistics_target 200. Should I increase it?
I would
Hi,
On 12 September 2012 16:41, Kenaniah Cerny kenan...@gmail.com wrote:
In the service script that gets installed to /etc/rc.d/init.d/, there is a
hard-coded value for PGPORT. Would it be possible to have this variable and
the corresponding -p flag set when calling postgres removed?
My
Hi,
On 5 September 2012 12:14, Chris Travers chris.trav...@gmail.com wrote:
So people are using PostgreSQL in roles that aren't very visible anyway,
DBA's are usually coming to PostgreSQL from other RDBMS's, and few
applications are really distributed for PostgreSQL.
snip
Not only
this
Hi,
On 24 August 2012 07:39, Christopher Swingley cswin...@gmail.com wrote:
I don't know why, but you could convert 'interval' into something else
where all the functions work:
CREATE OR REPLACE FUNCTION interval_to_seconds(interval)
RETURNS double precision AS $$
SELECT (extract(days
Hi,
On 24 August 2012 11:44, Chris Travers chris.trav...@gmail.com wrote:
One thing I have found looking through Oracle and DB2 docs is that
their table inheritance seems to have all the same problems as ours
and their solutions to these problems seem rather broken from a
pure relational
Hi,
On 23 August 2012 23:37, Bill Moran wmo...@potentialtech.com wrote:
And the advice I have along those lines is to establish now what
constitutes unacceptable performance, and put some sort of monitoring
and tracking in place to know what your performance degradation looks
like and
Hi,
On 22 August 2012 07:07, Menelaos PerdikeasSemantix
mperdikeas.seman...@gmail.com wrote:
Let's say you have a father-child (or master-detail if you wish) hierarchy
of tables of not just 2 levels, but, say, 5 levels.
E.g. tables A, B, C, D and E organized in successive 1-to-N relationships:
Hi,
On 20 August 2012 11:28, Chris Travers chris.trav...@gmail.com wrote:
I have been reading up on object-relational features of Oracle and DB2 and
found that one of the big things they have that we don't is a path operator.
The idea is that you can use the path operator to follow some subset
Hi,
I have the following table:
dwh= \d events
Table public.events
Column |Type | Modifiers
--+-+---
datetime | timestamp without time zone |
request_duration | integer
Hi,
On 17 August 2012 07:14, Tomas Hlavaty t...@logand.com wrote:
thanks for your reply. I should have mentioned that I was using the
Ångström Distribution where postgresql is not provided via package
manager. I wonder how did the Ubuntu guys managed to overcome the
insufficient memory
Hi,
Several years ago I gave this presentation to a bunch of PHP
developers in order to show then that something else is out there :).
Presentation was based on MySQL 4.1 and Postgres 8.2/8.3 (early 2008).
I would like to do it again and I'm looking for sources which can I
re-use (and credit back
Hi,
On 27 July 2012 08:07, hartrc rha...@mt.gov wrote:
What is the purpose of the postgres database? I try and drop it and get
maintenance database can't be dropped error.
'postgres' database is something like 'mysql' database in MySQL.
You should be able to see additional database like
Hi,
I have the following table:
org_id | contract_name | org_specific_rule | count
--+--+---+---
smpj28p2 | Group 123| f | 3
smpj28p2 | Group 2 | f | 3
smpj28p2 | Group 2 | t
Hi,
On 11 April 2012 17:15, Sidney Cadot sid...@jigsaw.nl wrote:
I have written code to extract these positions, and now I want to put
them into a Postgres database. Specifically, I want to do this in a
way that allows *fast* lookups of positions, e.g. give me all
positions that have a White
Hi,
On 2 April 2012 08:38, Ivan Voras ivo...@freebsd.org wrote:
db= set enable_seqscan to off;
snip
This huge cost of 100 which appeared out of nowhere in the
EXPLAIN output and the seq scan worry me - where did that come from?
It is not possible to disable seq scan completely.
Hi,
On 23 March 2012 19:14, Frank Lanitz fr...@frank.uvena.de wrote:
Am 23.03.2012 06:45, schrieb Gerhard Wiesinger:
With a database admin of a commercial database system I've discussed
that they have to provide and they also achieve 2^31 transactions per
SECOND!
Just corious: What is
Hi,
On 13 March 2012 15:11, François Beausoleil franc...@teksol.info wrote:
When using COPY FROM STDIN to stream thousands of rows (20k and more hourly),
what happens with indices? Are they updated only once after the operation, or
are they updated once per row? Note that I'm not replacing
Hi,
On 9 March 2012 02:23, dennis jenkins dennis.jenkins...@gmail.com wrote:
I've also looked at the Fusion-IO products. They are not standard
flash drives. They don't appear as SATA devices. They contains an
FPGA that maps the flash directly to the PCI bus. The kernel-mode
drivers blits
Hi,
On 9 March 2012 05:20, Scott Marlowe scott.marl...@gmail.com wrote:
On Thu, Mar 8, 2012 at 11:16 AM, mgo...@isstrucksoftware.net wrote:
In some languges you can use set l_localid = @@identity which returns
the value of the identity column defined in the table. How can I do
this in
Hi,
I would like to get some ideas about subject. I do not have any
preferred solution (hot-standby, Slony or pgpoll) so anything which
can deliver/satisfy the following will good:
- one side completely down: Client should use switch to other side
transparently (Failover / High Availability)
-
Hi,
On 7 March 2012 10:36, John R Pierce pie...@hogranch.com wrote:
On 03/06/12 3:31 PM, Ondrej Ivanič wrote:
- one side completely down: Client should use switch to other side
transparently (Failover / High Availability)
what happens if the link between the sites is down and both sides
Hi,
On 28 February 2012 11:53, Jameison Martin jameis...@yahoo.com wrote:
I'm seeing GMTERROR: canceling autovacuum task lines in my logs.
That's *should* be fine. autovacuum daemon is smart enough to cancel
it self when other query needs access to the table. The affected table
will be
Hi,
On 16 February 2012 01:14, Robert James srobertja...@gmail.com wrote:
What rules of thumb exist for:
* How often a table needs to be vacuumed?
* How often a table needs to be analyzed?
* How to tune Autovacuum?
I prefer to use autovacuum daemon and sets thresholds on per table
basis i.e.
Hi,
On 2 February 2012 11:38, Christopher Opena counterv...@gmail.com wrote:
We've been running into some very strange issues of late with our PostgreSQL
database(s). We have an issue where a couple of queries push high CPU on a
few of our processors and the entire database locks (reads,
Hi,
On 30 January 2012 09:19, Adam Rich ada...@sbcglobal.net wrote:
desired time, I want to show them the 5 times from the table that are
closest to their
input. I expected to do this using abs() like such:
select mytime from mytable order by abs(usertime-mytime) asc limit 5;
However,
Hi,
On 18 January 2012 11:31, David Salisbury salisb...@globe.gov wrote:
I've got a table:
Taxa
Column |Type
+-
id | integer |
parent_id | integer |
Hi,
On 10 January 2012 09:16, Jason Buberel ja...@altosresearch.com wrote:
We have lots of them, they are much smaller than the tables, and that will
allow us to do the migrations more incrementally.
In your case I would keep data and indexes on different table spaces
(and lower
Hi,
On 10 January 2012 06:10, Jason Buberel ja...@altosresearch.com wrote:
Select median price for every zip code as of 2012-01-06 (customer exports)
Select median price for 94086 from 2005-01-01 through 2012-01-06 (charting
apps)
So by partitioning in one dimension we impact queries in the
Hi,
On 8 January 2012 01:52, Jason Buberel ja...@altosresearch.com wrote:
psql create tablespace 'newstorage' location '/some/new/path';
psql alter table city_summary set tablespace = 'newstorage';
Be aware that you are not going to move indexes (see ALTER INDEX name
SET TABLESPACE
Hi,
On 4 January 2012 10:26, Rich Shepard rshep...@appl-ecosys.com wrote:
select max(quant), site, sampdate from chemistry where stream = 'SheepCrk'
and param = 'TDS' group by site, sampdate;
but this gives me the value of each site and date, not the maximum for all
dates at a specific site.
Hi,
On 2 January 2012 03:26, Raymond O'Donnell r...@iol.ie wrote:
And also - does PERFORM works with FOUND?
Not sure what you mean - can you elaborate?
No, perform (and execute) doesn't populate 'found' variable:
Hi
2012/1/3 David Johnston pol...@yahoo.com:
On Jan 2, 2012, at 16:46, Ondrej Ivanič ondrej.iva...@gmail.com wrote:
Yes, PERFORM does populate FOUND.
From the documentation you just linked to
A PERFORM statement sets FOUND true if it produces (and discards) one or
more rows, false
Hi
As I'm sure many people know, check_postgres.pl has a wonderful (if rather
arcane) query to check table bloat, which has been copied all over the
intarwebz. When I try to use this query one one of my databases I'm told my
table (which has had no deletes) is wasting a whole lot of bytes,
Hi,
On 12 December 2011 15:39, Jayadevan M jayadevan.maym...@ibsplc.com wrote:
At the db level, Oracle provides Database replay feature. that lets you
replay the production server events in the development/test environment.
http://docs.oracle.com/cd/B28359_01/server.111/e12253/dbr_intro.htm
Hi,
On 23 November 2011 13:20, Lonni J Friedman netll...@gmail.com wrote:
I investigated, and found that for the past ~18 hours,
there's one autovacuum process that has been running, and not making
any obvious progress:
snip...
I'm using the defaults for all the *vacuum* options in
Hi,
On 22 November 2011 06:10, Joost Kraaijeveld j.kraaijev...@askesis.nl wrote:
Is it possible, and if so how, to export a single column of a table into
a separate file per row? I have a table with ~21000 rows that have a
column body1 containing ASCII text and I want to have 21000 separate
Hi,
On 21 November 2011 00:33, Phoenix Kiula phoenix.ki...@gmail.com wrote:
Hi.
Want to start another thread, loosely related to the performance
problems thread I have going.
Need some DB design guidance from the gurus here.
My big table now has about 70 million rows, with the following
Hi,
On 14 November 2011 11:09, Alexander Burbello burbe...@yahoo.com.br wrote:
What can I do to tune this database to speed up this restore??
My current db parameters are:
shared_buffers = 256MB
maintenance_work_mem = 32MB
You should increase maintenance_work_mem as much as you can.
Hi,
On 11 November 2011 00:04, Jay Levitt jay.lev...@gmail.com wrote:
Sometimes the planner can't find the most efficient way to execute your
query. Thanks to relational algebra, there may be other, logically
equivalent queries that it DOES know how to optimize.
But I don't know relational
Hi,
mostly heavy read
workloads but OLTP performance is required (like run query over 100m+
dataset in 15 sec)
that isn't OLTP, its OLAP. Online Analytic Processing rather than Online
Transaction Processing large complex reporting queries that have to
aggregate many rows is classic
Hi,
2011/11/8 Craig Ringer ring...@ringerc.id.au:
Spreads reads too much ?
Are you saying there's too much random I/O? Is it possible it'd benefit from
a column store?
When you're using Greenplum are you using Polymorphic Data Storage column
storage WITH (orientation=column) ?
yes,
Hi,
2011/11/8 Tomas Vondra t...@fuzzy.cz:
Sure you did - you've stated that mostly heavy read
workloads but OLTP performance is required (like run query over 100m+
dataset in 15 sec). That clearly mentions OLTP ...
Whatever :) Let's make it clear: I need to run aggregates/roll
ups/drill
Hi,
On 8 November 2011 22:33, Chrishelring christianhelr...@gmail.com wrote:
I want to exclude access to our postgresql db using a configuration in the
pg_hba.conf file. I have a range of IP adress that should have access, but
how do I do that?
The range is 10.17.64.1 - 10.17.79.254 (eg.
Hi,
On 9 November 2011 04:53, John R Pierce pie...@hogranch.com wrote:
On 11/08/11 1:49 AM, Ondrej Ivanič wrote:
Greenplum or Postgres + Fusion IO can deliver this performance for us.
then, thats your answer! it ain't free, oh well.
FusionIO is little bit problematic: smaller card (2.4TB
Hi,
it's a lot of work and right now the only people
who've done that work aren't giving it away for free - or not in any form
that can be integrated into PostgreSQL without removing other capabilities
other users need.
One MPP vendor implemented columnar store in roughly six months --
lot's
Hi,
I have simple question (I think which is not easy to answer): why
Postgres is so slow comparing to other Postgres based MPP products
(even on the same box in single node configuration)?
I'm mot talking about multi node setup; all benchmarks were done on
single box (CentOS 5.5, 16 cores, 80GB
Hi,
On 8 November 2011 16:58, Craig Ringer ring...@ringerc.id.au wrote:
Which one(s) are you referring to? In what kind of workloads?
Are you talking about Greenplum or similar?
Yes, mainly Geenplum and nCluster (AsterData). I haven't played with
gridSQL and pgpool-II's parallel query mode
Hi,
On 2 November 2011 02:00, Debasis Mishra debasis1...@gmail.com wrote:
Thanks a lot for your replay. I just wanna know whether it is required for
me to run initdb or setting the PGDATA environment variable is enough?
Master needs to be properly initialised configured
- install postgres
-
Hi,
On 31 October 2011 23:33, Debasis Mishra debasis1...@gmail.com wrote:
RHEL HA clustering is configured to have zero downtime. So if primary server
is down then HeartBeat will bring secondary server online.
By RHEL HA clustering do you mean RedHat cluster suite? RHCS uses
SIGTERM and then
Hi,
On 12 October 2011 14:50, Anthony Presley anth...@resolution.com wrote:
After a few weeks of searching around, we're running into dead-ends on the
front-end, and the back-end. PG doesn't support OLAP / MDX and the GUI
tools that do this, for the most part, require MDX / OLAP (SPSS
Hi,
The *problem* with Greenplum is that it's ultra-expensive once you leave the
CE version - and you're not supposed to be using the CE version for
commercial usage last I read the license. Has that changed?
Not sure. I haven't seen something like that in the license. After POC
we bought HW
Hi,
On 12 October 2011 08:16, J.V. jvsr...@gmail.com wrote:
I need to be able to query for all primary keys and save the table name and
the name of the primary key field into some structure that I can iterate
through later.
psql -E is your friend here. Then use \d table and you get several
Hi,
On 10 October 2011 21:35, József Kurucz jozsef.kur...@invitel.hu wrote:
ERROR: syntax error at or near $1
LINE 1: create table $1 ( )
^
QUERY: create table $1 ( )
CONTEXT: SQL statement in PL/PgSQL function check_table near line 22
I think you have to use
Hi,
folks, don't use RULES! use triggers -- and as much as possible, keep
triggers simple, short, and to the point (simple validation, custom
RI, auditing/logging, etc).
I like them :). 'DO INSTEAD' rules are great for partitioning so you
can insert (or update) to parent table and 'DO
Hi,
On 22 September 2011 21:32, Rohan Malhotra yourbuddyro...@gmail.com wrote:
Hi Gurus,
What is difference between
select * from items order by random() limit 5;
and
select * items limit 5;
my basic requirement is to get random rows from a table, my where clause
This one says: give me
Hi,
On 20 September 2011 18:16, Simon Riggs si...@2ndquadrant.com wrote:
It would be useful to get some balanced viewpoints on this. I see you
have Alterian experience, so if you are using both it could be
valuable info. I've never heard anyone describe the downsides of
columnar datastores,
Hi,
2011/9/21 Tomas Vondra t...@fuzzy.cz:
Columnar store is good if:
- you are selecting less than 60% of the total row size (our table has
400 cols and usual query needs 5 - 10 cols)
- aggregates: count(*), avg(), ...
Where did those numbers come from? What columnar database are you using?
Hi,
On 20 September 2011 13:09, patrick keshishian pkesh...@gmail.com wrote:
e.g., ALTER TABLE sales DROP CONSTRAINT (SELECT conname FROM
pg_constraint JOIN pg_class ON (conrelid=pg_class.oid) WHERE
pg_class.relname='sales' AND conkey[1] = 1 AND contype='f') ;
You have to build query in
Hi,
to get the output OP wants, you need to expand and rewrap:
create or replace function unnest2(anyarray) returns setof anyarray AS
$BODY$
select array(select unnest($1[i:i])) from
generate_series(array_lower($1,1), array_upper($1,1)) i;
$BODY$
language 'sql';
Yup, this is what I need.
Hi,
I need function which unnest array in a different way. Input table has
ineger[][] column:
col1
--
{{1,2,3,4}, {5,6,7,8}, {9, 10, 11, 12}}
{{11,12,13,14}, {15,16,17,18}, {19, 110, 111, 112}}
...
and output should be:
select unnest2(col1) from T
unnest2
-
{1,2,3,4}
Hi,
On 15 September 2011 23:40, Marc Mamin m.ma...@intershop.de wrote:
Are there other way we should evaluate ?
Should we better wait foir POstgres 9.2+ ?
You can try pgpool-II (Parallel Query mode) or MPP database like
Greenplum (Community Edition). Another option is high IOPS (500k+) SSD
Hi,
On 14 September 2011 07:44, Brian Fehrle bri...@consistentstate.com wrote:
2. I have appropriate indexes where they need to be. The issue is in the
query planner not using them due to it (i assume) just being faster to scan
the whole table when the data set it needs is as large as it is.
Hi,
On 12 September 2011 15:03, Adarsh Sharma adarsh.sha...@orkash.com wrote:
Today I need some part ( subset ) of some tables to another database to a
remote server.
I need to take backup of tables after satisfying a select query.
Is there any option to specify query in pg_dump command.I
Hi,
On 2 September 2011 03:09, Jerry LeVan jerry.le...@gmail.com wrote:
I keep registration numbers for software and login/passwords for
various organizations, etc…
As time goes by the tables on the various computers get out of
sync.
Is there an elegant way I can get all of the differences
Hi,
I have several queries in *single* transaction and I want to figure
out reasonable work_mem value. Here is the excerpt from explain plan
-- each query has two sorts:
1) Sort Method: quicksort Memory: 6 324kB
Sort Method: quicksort Memory: 1 932
Hi,
On 26 August 2011 00:14, Tom Lane t...@sss.pgh.pa.us wrote:
=?UTF-8?Q?Ondrej_Ivani=C4=8D?= ondrej.iva...@gmail.com writes:
work_mem is set to 4 000 000 kb and I do not understand why few
queries (3 and 5) used disk and the rest fit were able to data into
memory.
The on-disk
Hi,
On 25 August 2011 11:17, Toby Corkindale
toby.corkind...@strategicdata.com.au wrote:
Do I need to make sure I re-create every index on every child table I
create?
That would be.. annoying, at best.
Yes, it is little bit annoying but I like it. You don't need any index
on parent table but
Hi,
On 12 August 2011 14:57, Greg Smith g...@2ndquadrant.com wrote:
I'm about to evaluate this SSD card: FusionIO ioDrive Duo [1]. The
main reason for this experiment is to see if SSD can significantly
improve query performance
The result is that FusionIO will help to our queries which was
Hi,
On 14 August 2011 20:25, k_b k_b0...@yahoo.se wrote:
Hi.
For learning purpose i would like to make a small database with a small
graph of locations, roads and public transport information.
Then calculate the fastest or cheapest way between two points.
If we think of a minimal network,
Hi,
On 12 August 2011 14:57, Greg Smith g...@2ndquadrant.com wrote:
ioDrive hardware is fast at executing all sorts of I/O, but it particularly
excels compared to normal drives with really random workloads.
That's what I hope for :). It looks like that ioDrive is 3 to 5 times
faster for seq IO
Hi,
2011/8/11 Amitabh Kant amitabhk...@gmail.com:
There have been several discussions for SSD in recent months although not
specific to Fusion IO drives.
See http://archives.postgresql.org/pgsql-general/2011-04/msg00460.php . You
can search the archives for more such reference.
I've read
Hi,
2011/8/10 Tomas Vondra t...@fuzzy.cz:
On 10 Srpen 2011, 1:17, Ondrej Ivanič wrote:
- What needs to be changed at Postgres/Operating system level? The
obvious one is to change random_page_cost (now: 2) and seq_page_cost
(now: 4). What else should I look at?
Are you sure about this? I'm
Hi,
I'm about to evaluate this SSD card: FusionIO ioDrive Duo [1]. The
main reason for this experiment is to see if SSD can significantly
improve query performance. So, I have the following questions:
- Could you please share your experience with SSD? Any issues?
- What needs to be changed at
Hi,
2011/8/9 Merlin Moncure mmonc...@gmail.com:
You have a few of different methods for passing sets between functions.
I do not want to pass data between functions. The ideal solution
should look like this:
select * from my_map_func(select query)
1) refcursor as David noted. reasonably
Hi,
It is possible to pass query result (or cursor?) as function
parameter? I need a function which emits zero or more rows per input
row (map function from mapreduce paradigm). Function returns record
(or array): (value1, value2, value3)
I've tried the following:
1) create or replace function
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