Hi Dilip,
I dont think forcing MySQL to use Index can improve your performance.
MySQL decides on the index to be used based on the cardinality. Since
the cardinality is low MySQL has chosen a Index that can give the best
performance. Forcing that can only increase the volume of data that is
f
OR
Try Using this query ...Just a try
SELECT COUNT(*) antal, ad.ad_url, ad.adtext_plain FROM ad use index(index_name)
LEFT JOIN tag_ad_map tm ON concat(tm.ad_id=ad.ad_id)
WHERE tm.tag_id IN (99, 10807, 20728, 447, 807) AND (ad.is_removed = 0 AND
ad.is_active=1 AND (ad.ant_feedback_alert <
Hi johan,
U can use and try to write a query to use index in it (like use index(index
name) before where condition.
And other variables also looks like ok seems let me check, Please try to send
the output of global status.
Show global status;
Thanks & Regards,
Dilipkumar
-Original Messa
Hi johan,
you have allocated 4M for your sort buffer size is ok. So i feel that
the query is loading more than 4MB of data so it is creating a temporary
file to do a sorting. please try to put some logic into the query that
you use to load the appropriate data. I find that the tag_id has a
car
mysql> show global variables like 'sort%';
+--+-+
| Variable_name| Value |
+--+-+
| sort_buffer_size | 4194296 |
+--+-+
1 row in set (0.01 sec)
18 sep 2008 kl. 08.05 skrev chandru:
Hi Johan,
the query is going for a t
Hi Johan,
the query is going for a temporary table creation "Using temporary;
Using filesort"
In case your sort_buffer_size is too low please try increasing the same.
Be cautious don't try to increase it massively, since it is a per thread
memory allocation.
please let me know what is you
Glyn,
Thank you for responding.
To start with, check that the .pid file doesn't exist if the server is stopped
Part of the problem is that I can't stop the server.
$ sudo /etc/init.d/mysql stop
* Stopping MySQL database server mysqld [fail]
try running it manually with "/etc/init.d/mysql
>Thanks, but is there any technical reason where using "@" might break
something?
>However if there's even the slightest risk of an implosion, naturally
we will not.
Eh? Did you read the manual page on identifiers?
PB
Res wrote:
Hi Peter,
On Wed, 17 Sep 2008, Peter Brawley wrote:
I'm look
On Thu, 2008-09-18 at 08:34 +1000, Res wrote:
> Hi Peter,
>
> On Wed, 17 Sep 2008, Peter Brawley wrote:
>
> >> I'm looking at using the "@" symbol
> >
> > Don't. Restrict yourself to alphanums and '_'.
>
> Thanks, but is there any technical reason where using "@" might break
> something? Howeve
On Wed, 2008-09-17 at 23:29 +0100, Stut wrote:
> On 17 Sep 2008, at 22:34, Jerry Schwartz wrote:
> > Our Japanese partners will notice and will ask. Similar things have
> > come up
> > before.
> >
> > I want to be pro-active.
>
> Notice what? Why would it be bad? What type of data are we dealing
On 17 Sep 2008, at 22:34, Jerry Schwartz wrote:
Our Japanese partners will notice and will ask. Similar things have
come up
before.
I want to be pro-active.
Notice what? Why would it be bad? What type of data are we dealing
with here?
If each row requires a unique ID use an autonumber. I
unless you cant spare a few milliseconds off of each insert..
i strongly suggest to use autoincrement
http://dev.mysql.com/doc/refman/5.0/en/example-auto-increment.html
Martin
__
Disclaimer and confidentiality note
Everything in this e-mail and any
Our Japanese partners will notice and will ask. Similar things have come up
before.
I want to be pro-active.
Regards,
Jerry Schwartz
The Infoshop by Global Information Incorporated
195 Farmington Ave.
Farmington, CT 06032
860.674.8796 / FAX: 860.674.8341
www.the-infoshop.com
www.giiexpress.
>Is there any elegant way of finding the gaps?
You'll find some ideas under (and near) "Find missing numbers in a
sequence" at http://www.artfulsoftware.com/infotree/queries.php.
PB
-
Stut wrote:
On 17 Sep 2008, at 22:12, Jerry Schwartz wrote:
I have records that should be sequentially
On 17 Sep 2008, at 22:12, Jerry Schwartz wrote:
I have records that should be sequentially (not auto-increment)
numbered,
but there are gaps. Is there any elegant way of finding the gaps?
Why do they need to be sequential? When this requirement comes up it's
usually for illogical reasons.
I have records that should be sequentially (not auto-increment) numbered,
but there are gaps. Is there any elegant way of finding the gaps?
Regards,
Jerry Schwartz
The Infoshop by Global Information Incorporated
195 Farmington Ave.
Farmington, CT 06032
860.674.8796 / FAX: 860.674.834
On Wed, Sep 17, 2008 at 12:47 PM, [EMAIL PROTECTED]
<[EMAIL PROTECTED]>wrote:
> Hi,
>
> What's in the bin-logs? (mysqlbinlog )
>
> cheers,
> Doug
>
> Doug,
We capture time-sensitive data, and after checking all the counts on tables
known to accept inserts, I restarted the server. That stopped t
'new' england
thanks/
Martin
__
Disclaimer and confidentiality note
Everything in this e-mail and any attachments relates to the official business
of Sender. This transmission is of a confidential nature and Sender does not
endorse distribution to a
On Wed, Sep 17, 2008 at 12:54 PM, Martin Gainty <[EMAIL PROTECTED]> wrote:
>
> Dave-
>
> we havent had a hurricane since up here since 1938..if you want to relocate
> your servers just give a holler
> and i'll lend you mine!
>
> Martin
> __
Thanks, Mar
Dave-
we havent had a hurricane since up here since 1938..if you want to relocate
your servers just give a holler
and i'll lend you mine!
Martin
__
Disclaimer and confidentiality note
Everything in this e-mail and any attachments relates to the off
Hi,
What's in the bin-logs? (mysqlbinlog )
cheers,
Doug
Original Message:
-
From: David Giragosian [EMAIL PROTECTED]
Date: Wed, 17 Sep 2008 12:38:01 -0500
To: mysql@lists.mysql.com
Subject: Show Master Status
Hurricane Ike has caused our replication set-up to misbehave.
I'v
Hurricane Ike has caused our replication set-up to misbehave.
I've stopped the (one and only) application that inserts data into the
master, but show master status's 'position' field continues to increment.
Have I missed something or is this unexpected behavior?
version 5.0.22 on CentOS 5.
Th
Thank you, that was a very helpful discussion.
I'm worried a bit about scalability. This is a personal project so I will
be the primary user of the end-result; however, if it is robust enough, I'd
like to open it up to a larger audience. This type of scheme doesn't seem
to lend itself to easily
Hi Jeffrey,
David already gave a lot of valid points.
Table-per-documenttype seems the way to go here.
As to the 'best' db-scheme for your task given your description you have to
ask yourself a couple of questions:
Please note that with a document-type I mean a type like book, html page,
etc.
On Wed, Sep 17, 2008 at 11:38 AM, Jeffrey Santos <[EMAIL PROTECTED]>wrote:
> Hi David,
>
> My project involves storing information that could have been gathered from
> wildly different sources. You can think of this part of the database as a
> sort of bibliography for the sources of that informat
Hi David,
My project involves storing information that could have been gathered from
wildly different sources. You can think of this part of the database as a
sort of bibliography for the sources of that information. If I gathered
information from a book, for instance, there are some generally r
In my example given earlier which accounts for possible overlap in required
fields, would your paragraph still apply?
e.g., I would probably need all the field information every time I access a
source type's requireds so that would fall under your description; however,
that would mean having to ha
> The mysqld.pid file is in /var/run/mysqld.
>
> The mysql.sock file is in /tmp
>
> > What symlink did you make?
> None right now. I removed any that I had made before so
> that I wouldn't
> confuse the situation.
>
To start with, check that the .pid file doesn't exist if the server is stoppe
Glyn,
Thanks for responding.
Does the .pid file exist in either /var/run/mysqld/ or /tmp/ at the moment?
The mysqld.pid file is in /var/run/mysqld.
The mysql.sock file is in /tmp
What symlink did you make?
None right now. I removed any that I had made before so that I wouldn't
confuse t
On Wed, Sep 17, 2008 at 5:46 AM, Jeffrey Santos <[EMAIL PROTECTED]> wrote:
> I'm not sure if this is the right list to ask such a question; if not, any
> direction as to the appropriate forum would be much appreciated!
>
> This may be a simple question, but I'm still on the early stages of my
> le
On Wed, Sep 17, 2008 at 7:19 AM, Kevin Hunter <[EMAIL PROTECTED]> wrote:
> At 5:46am -0400 on Wed, 17 Sep 2008, Jeffrey Santos wrote:
>> I'm developing an application
>> that will require information from various sources. Since what
>> might be considered required information about those sources w
--- On Wed, 17/9/08, Dave M G <[EMAIL PROTECTED]> wrote:
> From: Dave M G <[EMAIL PROTECTED]>
> Subject: Re: MySQL not running on fresh LAMP install
> To: mysql@lists.mysql.com
> Date: Wednesday, 17 September, 2008, 12:51 PM
> TLUG,
>
> Thanks for the helpful advice.
>
> Unfortunately I've hi
>I'm looking at using the "@" symbol
Don't. Restrict yourself to alphanums and '_'.
PB
Res wrote:
Hi All,
Does anyone have a reference to what is regarded a legal valid chars
for the MySQL database username?
You can imagine what google shows me, everything totally irrelevant, as
usual. The
Kevin,
Thank you for the extensive reply, the information you provide makes perfect
sense. I have read about normalization so was anticipating that choice #2
would probably be more appropriate.
In terms of the specifics of the project... This portion of the database
would act as a sort of biblio
TLUG,
Thanks for the helpful advice.
Unfortunately I've hit an error I don't know what to do about.
The symlink solution worked, but Ubuntu clears the /tmp directory on
every boot. So I edited the my.cnf file to use /tmp/mysql.sock.
But when I tried to restart MySQL, it kept saying "[fail]".
okie..got u
On 9/17/08, Bard Aase <[EMAIL PROTECTED]> wrote:
>
> On Wed, Sep 17, 2008 at 12:42 PM, Ananda Kumar <[EMAIL PROTECTED]> wrote:
> >>query_cache_limit is the maximum size of a single resultset in the
> >> cache. If your query results in a bigger resultset it will never get
> >> into the
At 5:46am -0400 on Wed, 17 Sep 2008, Jeffrey Santos wrote:
> I'm developing an application
> that will require information from various sources. Since what
> might be considered required information about those sources will
> vary (occasionally dramatically), I'm unsure as to the correct
> desi
On Wed, Sep 17, 2008 at 12:42 PM, Ananda Kumar <[EMAIL PROTECTED]> wrote:
>>query_cache_limit is the maximum size of a single resultset in the
>> cache. If your query results in a bigger resultset it will never get
>> into the cache even if its room for it in the cache itself.
>
>
>
> Even if there
>query_cache_limit is the maximum size of a single resultset in the
> cache. If your query results in a bigger resultset it will never get
> into the cache even if its room for it in the cache itself.
Even if there is room why will it not fit into the cache.
On 9/17/08, Bard Aase <[EMAIL PRO
On Wed, Sep 17, 2008 at 11:54 AM, Uwe Kiewel <[EMAIL PROTECTED]> wrote:
> Bard Aase schrieb:
>> On Wed, Sep 17, 2008 at 11:37 AM, Uwe Kiewel <[EMAIL PROTECTED]> wrote:
>>> Hi,
>>>
>>> I have two questions regarding the query cache:
>>>
>>> 1. What is the difference between query_cache_limit and que
Bard Aase schrieb:
> On Wed, Sep 17, 2008 at 11:37 AM, Uwe Kiewel <[EMAIL PROTECTED]> wrote:
>> Hi,
>>
>> I have two questions regarding the query cache:
>>
>> 1. What is the difference between query_cache_limit and query_cache_size?
>
> query_cache_limit is the maximum size of a single resultset
I'm not sure if this is the right list to ask such a question; if not, any
direction as to the appropriate forum would be much appreciated!
This may be a simple question, but I'm still on the early stages of my
learning about databases. I'm developing an application that will require
information
On Wed, Sep 17, 2008 at 11:37 AM, Uwe Kiewel <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I have two questions regarding the query cache:
>
> 1. What is the difference between query_cache_limit and query_cache_size?
query_cache_limit is the maximum size of a single resultset in the
cache. If your query re
Hi,
I have two questions regarding the query cache:
1. What is the difference between query_cache_limit and query_cache_size?
mysql> show variables like '%query_cache%';
have_query_cache | YES |
query_cache_limit| 1048576 |
query_cache_min_res_unit | 4096 |
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