On Fri, Sep 30, 2011 at 2:12 PM, Merlin Moncure wrote:
>> FWIW, speaking as somebody who has no need of this function, "array_xor" is
>> a pretty clear name that indicates what's going to happen.
>
> +1 on this -- was going to suggest until you beat me to it. I also
> for the record really think
EnterpriseDB now has Postgres Enterprise Manager
(http://enterprisedb.com/products-services-training/products/postgres-enter
prise-manager) that has some of the information that is being asked for.
It has a hot table analysis report that shows the number of scans, rows
read, etc. Since much of the
On Fri, Sep 30, 2011 at 3:15 PM, Ben Chobot wrote:
>
> On Sep 30, 2011, at 12:07 PM, bricklen wrote:
>
>> I've been informed that this type of operation is called "symmetric
>> difference"[1], and can be represented by A ∆ B. A couple of
>> alternative names were proposed, "array_symmetric_differ
On Sep 30, 2011, at 12:07 PM, bricklen wrote:
> I've been informed that this type of operation is called "symmetric
> difference"[1], and can be represented by A ∆ B. A couple of
> alternative names were proposed, "array_symmetric_difference" and
> "array_xor".
> Does anyone have a preference fo
Josh Berkus writes:
>> In principle, yeah, we could make it do that, but it seems like a likely
>> source of maintenance headaches. This example is not exactly compelling
>> enough to make me want to do it. Large OFFSETs are always going to be
>> problematic from a performance standpoint, and th
Tom,
> In principle, yeah, we could make it do that, but it seems like a likely
> source of maintenance headaches. This example is not exactly compelling
> enough to make me want to do it. Large OFFSETs are always going to be
> problematic from a performance standpoint, and the fact that we coul
On Fri, Sep 30, 2011 at 5:23 AM, Vitalii Tymchyshyn wrote:
> Since you are using except and not except all, you are not looking at arrays
> with duplicates.
> For this case next function what the fastest for me:
>
> create or replace function array_except2(anyarray,anyarray) returns
> anyarray as
Em 30-09-2011 14:01, Merlin Moncure escreveu:
2011/9/29 Ondrej Ivanič:
Hi,
On 30 September 2011 01:08, Kevin Grittner wrote:
Is there a suggested number of child tables for table
partitioning,
Generally, don't go over about 100 partitions per table.
Having 365 partitions per table is fine..
2011/9/29 Ondrej Ivanič :
> Hi,
>
> On 30 September 2011 01:08, Kevin Grittner
> wrote:
>>> Is there a suggested number of child tables for table
>>> partitioning,
>>
>> Generally, don't go over about 100 partitions per table.
>
> Having 365 partitions per table is fine...
yeah -- the system was
It may be difficult, i think. When unsorted recordset is stored in
temp table, number of records may be saved and used. Otherwise it is
unknown.
2011/9/30, Josh Berkus :
> All,
>
> Here's a case which it seems like we ought to be able to optimize for:
>
> datamart-# ORDER BY txn_timestamp DESC
> d
Josh Berkus writes:
> Here's a case which it seems like we ought to be able to optimize for:
> [ offset skips all the output of a sort node ]
> Is there some non-obvious reason which would make this kind of
> optimization difficult? Doesn't the executor know at that point how
> many rows it has?
On Fri, Sep 30, 2011 at 5:23 AM, Vitalii Tymchyshyn wrote:
> Since you are using except and not except all, you are not looking at arrays
> with duplicates.
> For this case next function what the fastest for me:
>
> create or replace function array_except2(anyarray,anyarray) returns
> anyarray as
Since you are using except and not except all, you are not looking at
arrays with duplicates.
For this case next function what the fastest for me:
create or replace function array_except2(anyarray,anyarray) returns
anyarray as $$
select ARRAY(
(
select r.elements
from(
(select 1,unne
Looks like this is generally an area that can be targeted by some
businesses. Or an open source enthusiast.
One centre that captures all the information and produces a report
based on it would be a great thing. Especially in cases like mine,
where I have tens of postgresql installations on differen
CPU load was hitting 100% constantly with high IOs.
We tuned some queries to decrease the CPU usage and everything is normal
now.
Thanks
VB
On Fri, Sep 30, 2011 at 10:52 AM, Venkat Balaji wrote:
> I did not calculate the IO behavior of the server.
>
> What i noticed for the logs is that, the ch
Hi Tomas,
I will let you know about "check_postgres.pl".
We will explore "pgmonitor" as well.
The other tool we are working on is "pgwatch", we found this very useful.
Thanks
VB
On Wed, Sep 28, 2011 at 5:44 PM, Tomas Vondra wrote:
> On 28 Září 2011, 9:05, Greg Smith wrote:
> > Venkat Balaji
Thanks Greg !
Sorry, I should have put it the other way.
Actually, I am looking for any tool (if exists) which gets me the following
information with one installation or so.
Please see my replies below.
Thanks
VB
On Wed, Sep 28, 2011 at 12:35 PM, Greg Smith wrote:
> Venkat Balaji wrote:
>
>>
17 matches
Mail list logo
