I'm not certain, but I don't think a multi-column index will help here. The
manual is unclear on how a multi-column index is used when you are comparing
the first key part to a range rather than to a constant, but I get the
impression it doesn't use the second key part in that case. For you,
Great idea! Unfortunately:
mysql SELECT MAX(ip_end - ip_start) FROM ip2org;
++
| MAX(ip_end - ip_start) |
++
| 100663295 |
++
1 row in set (12.24 sec)
-Original Message-
From: Michael Stassen
Cemal,
I recall hearing a similar question mentioned in a previous email
thread. In fact, here it is:
Greetings All!
MySQL AB is interested in talking to MySQL users who running MySQL on
IBM Power CPU server hardware (pSeries, iSeries, JS20
Blade).
If you (or someone you know) are willing to chat with us, please let me
know at [EMAIL PROTECTED]
Thank you for your help!
Cheers!
--
Zak Greant
Dear Sir,
Sergei Golubchik gives me this e-mail address telling me that you can help
me about a project that my company is developing.
we need to develope a J2SE project that works on N MYSQL 4.0.20 servers
installed on the same machine.
Now I try to explain my problem.
The Hardware, actually,
Hi,
I got an error 27.
DBD::mysql::st execute failed: Got error 27 from table handler at
/home/u752359/logfile.pl line 144, PS_F line 3079464.
The FAQs say:
Check whether you have hit 2 Gb limit.
If that is not the case, shutdown MySQL server and repair a table with
(my)isamchk.
How do I check
David,
David Griffiths wrote:
We are in the process of setting up a new MySQL server. It's a
dual-Opteron (Tyan Thunder K8S motherboard) with 6 gig of DDR333 RAM
(registered) and an LSI SCSI card with 6 SCSI drives (5 in a RAID-5
array, with one hot-spare) running SuSE Enterprise 8.1 (64-bit).
Is there any harm in using the USE_FRM directive by default whenever
repairing a table?
Thanks,
Dan
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.703 / Virus Database: 459 - Release Date: 6/10/2004
i have been reading..
and i have found 3 ways to have a copy of mysql master datas for initilize the
mysql slave
( always having in mind innodb compatibility )
1)
FLUSH TABLES WITH READ LOCK
see the 'SHOW MASTER STATUS' sentence
shutdown master database
copy all data, log and .frm files
Hi!
On Jun 25, Dan Cumpian wrote:
Is there any harm in using the USE_FRM directive by default whenever
repairing a table?
Yes.
See http://bugs.mysql.com/4252
Regards,
Sergei
--
__ ___ ___ __
/ |/ /_ __/ __/ __ \/ / Sergei Golubchik [EMAIL PROTECTED]
/ /|_/ / // /\ \/
Pierre,
Myslave working status is different to yours and as you can see there
are values missing in yours such as Master_Log_File, etc. It seems your
slave is not establishing successful replication communication with the
master.
What is your SLAVE IP address?
What does your MASTER my.ini file
Hello,
I was reading through the documentation, but I couldn't find anything on
how to bind mysql to a certain ip-address. The only thing I found was
how to bind mysql to a different port:
mysqld_safe --port=port_number
But I don't want mysql to listen on all interfaces.
Regards
Marten
--
MySQL
Alfredo,
I have just a few additional questions that you did not already answer in
your very well-formed post. I normally wouldn't worry about ANY of these
issues but you seem to be exploring the envelope of performance on your
system and every little bit counts:
Which communication path are
bind-address is what you need.
http://dev.mysql.com/doc/mysql/en/Server_options.html
[]s,
Sergio.
On Fri, 25 Jun 2004, Marten Lehmann wrote:
Hello,
I was reading through the documentation, but I couldn't find anything on
how to bind mysql to a certain ip-address. The only thing I found
Could this problem be due to the size of my tables? Is there a limit on how
big the table can be?
I'm using mysql-standard-4.0.20.
-rw-rw 1 mysqlmysql2147483647 Jun 25 01:49 internet_usage.MYD
-rw-rw 1 mysqlmysql622724096 Jun 25 01:49 internet_usage.MYI
Hi,
I got an
If you want to use as little space as possible use char(0) and null/not-null
for your boolean values:
CREATE TEMPORARY TABLE test_bool (i char(5), bool char(0));
INSERT INTO test_bool VALUES
('true',''),('false',null),('true',''),('true',''),('false',null);
SELECT * FROM test_bool WHERE bool is
Is there any benefit to having the .MYD files on one drive, and the .MYI on
its own dedicated hard drive??
rm
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Hi,
thank you very much for your reply.
Now I answer you about your additional questions:
Now the daemon is installed on a machine different than DB Server, so I
use DBServer NIC IP Address for connect to it from the daemon (So I don't
use Unix Sockets).
But, looking at the Network Bandwidth,
try removing your client for the moment:
can you try a load data infile and see at what speed mysql loads
the rows?
-Messaggio originale-
Da: Alfredo Marchini [mailto:[EMAIL PROTECTED]
Inviato: venerdì 25 giugno 2004 18.21
A: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED];
[EMAIL
Yes, if you are using a dynamic table which means it has varchar's, text, or
blobs the limit is 2 gigs. If you are using a fixed table which uses chars
only, then there is no limit that I have seen.
Donny
-Original Message-
From: J S [mailto:[EMAIL PROTECTED]
Sent: Friday, June 25,
This is crazy. If someone can help me out, I'll pay them!
A table:
+--+-+--+-+-+---+
| Field| Type| Null | Key | Default | Extra |
+--+-+--+-+-+---+
| ip_start | bigint(20) | | MUL | 0 |
Martin,
1) I would insure there is an index on both TABLEY2.y_id and Y_TABLE.y_id
2) I would change the subselect in your insert statement to be a LEFT
JOIN... WHERE xxx IS NULL.
INSERT INTO X(column1)
SELECT Y.y_id
FROM Y_TABLE Y
LEFT JOIN TABLEY2 t2
ON t2.y_id = Y.y_id
WHERE t2.y_id IS
The general rule of thumb (in Sybase not sure for MySQL), is if using an
index hits more than 10% of the tables total volume it is
faster/cheaper/less evasive on the drive to just table scan the table
opposed to read an index row, get the representing table row pointer and
seek the table for each
I don't really understand the difference (I need to read up a bit more). My
(default mysql) table internet_usage has the following columns:
uid varchar (10)
ip bigint
time datetime
urlid int
size int
Is there something I can do to this to fix it so that it can grow larger
than 2 GB? The 'uid'
Hi Martin,
Speaking more from a general standpoint (I mostly work with MS SQL, but my
home projects are MySQL - these days there is precious little time for
those, though)..
Assuming you have appropriate indexes on tables y and y2:
1. Truncate WILL be faster than delete, as it is a non-logged
Here is what the manual says about the table scan threshold:
(http://dev.mysql.com/doc/mysql/en/Where_optimisations.html)
Each table index is queried, and the best index is used unless the
optimizer believes that it will be more efficient to use a table scan. At
one time, a scan was used based
Yep, modify the uid from a varchar to a char. It will make your table
bigger, because char uses all 10 characters. But it will allow you to get
past the 2 gig limit. It will take a while for the table to be modified
though. But it's definitely worth the wait.
Also personally I would change
Hi Sean - thanks for the info, unfortunately, I can't use force index ...too
old a version of mysql
I wonder if there is some way to trick mysql into using an index?
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Friday, June 25, 2004 11:16 AM
To:
Hi All,
I have noticed that in phpMyAdmin, when I create a table and select the
columns I want indexed, if I select two or more columns (say fname and
lname) to be indexed, then when the table is created, instead of two keys,
I have only one key, and it contains both the fname and lname columns.
Bob, That did the trick!
Thanks!
Mike
-Original Message-
From: Bessares, Bob [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 24, 2004 6:03 PM
To: [EMAIL PROTECTED]; Mike Koponick
Subject: RE: OUTFILE to CVS with headers
well,
you can easily output into a comma separated file but the
Which is better depends on the sort of queries you will most often run. The
short version:
A multi-column index on lname,fname (order matters) would be used for
SELECT ... WHERE lname='Smith' AND fname = 'Joe';
and
SELECT ... WHERE lname='Smith';
but could not be used for
SELECT ... WHERE
Alfredo,
It seems funny to me that with 2 servers dealing with 2 sets of data
streams at the same time that you didn't see a performance boost. This is
leading me to think that it's either the application or the SCSI controller
not keeping up.
It makes sense that if you open up a second server
Hi!
I'm looking for a better way to insert large numbers of rows from a client
application that is sampling physical data in real-time. In our case, we
are using a C double hipvalues[100] cyclical array to buffer our
sampled values.
We're currently creating large query strings similar to:
Thanks for your reply. I had to change the IP column to bigint because mysql
was inserting the wrong value when it was just int.
Is this the correct command to change to chars ?
ALTER TABLE internet_usage CHANGE uid CHAR(10);
Yep, modify the uid from a varchar to a char. It will make your
Hi allit's possible to use the CASE clause in MySQLlike this:SELECT
statusID,
Case(statusID = 1, TotalStatus1=TotalStatus1 + 1)
Case(statusID = 2, TotalStatus2 = TotalStatus2 +1)
It's possible?
How to do that?
Thanx for your time.Crie seu Yahoo! Mail, agora com 100MB de espaço, anti-spam e
Frank,
We used the 64-bit source to compile 4.0.20, and we used the 32-bit
binaries.
The problem was tracked down at about 1am - it was the kernel (or the
SCSI drivers). We put a 3Ware SATA Raid-5 card in, and all the crashes
went away.
There are 64-bit binaries, but we had some problems with
Kinda sorta but not really
Your SELECT isn't against a table so I don't what TotalStatus1 and
TotalStatus2 are . Are they fields? Are they variables?
Assuming you have a tables called stores and you wanted to update one of
two columns based on a value in a third:
UPDATE stores
SET
J S wrote:
Thanks for your reply. I had to change the IP column to bigint because
mysql was inserting the wrong value when it was just int.
Are your ips IPv4 (4 byte) or IPv6 (8 byte)? I'm guessing IPv4. In that case:
mysql SELECT INET_ATON('0.0.0.1'), INET_ATON('255.255.255.255');
Thanks Shawn!
Marty Gainty
(cell) 617-852-7822
From: [EMAIL PROTECTED]
To: Martin Gainty [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
Subject: Re: Optimising SQL Statements
Date: Fri, 25 Jun 2004 12:59:28 -0400
MIME-Version: 1.0
Received: from lists.mysql.com ([213.136.52.31]) by mc3-f2.hotmail.com
When an INSERT operation returns an error 1216 (parent row does not
exist, FK constraint failed), and there are multiple FK constraints in the
target table, how do you know which one failed? Brute force method will
work, of course (do a select on each foreign key in its referenced table).
Hi Shawn,
I wondered if you might be able to help me with an SQL query.
I want to list all the internet sites I've surfed in my database.
Here's a query that matches the url with a urlid:
SELECT concat(usc.scheme,://,us.server,up.path)
FROM url_visit uv
INNER JOIN url_servers us
ON
Figured it out! Took a gamble and run the below command!
SELECT iu.time, INET_NTOA(iu.ip), concat(usc.scheme,://,us.server,up.path)
FROM url_visit uv
INNER JOIN internet_usage iu
ON iu.urlid=uv.urlid
INNER JOIN url_servers us
ON us.id=uv.url_server_ID
INNER JOIN url_paths up
I want to take 1 field in a mysql table and use that
information to populate an html form select field
instead of writing the html code, that way when data
changes in that mysql field the form will always be in
sync with the table?
--
MySQL General Mailing List
For list archives:
Hello,
I'm having some problems with a join I've been trying. Here's the table
structure
CREATE TABLE `business` (
`b_id` int(5) NOT NULL auto_increment,
`b_name` varchar(100) default NULL,
`b_contact` varchar(100) default NULL,
`b_address` varchar(100) default NULL,
`b_city`
Here's a way to do it with PHP:
function field_select($table, $field)
{$result = mysql_query(SELECT $field FROM $table) or
die(mysql_error());
print SELECT NAME=\ . $field . \\n;
$limit = mysql_num_rows($result);
for($i = 0; $i $limit; ++$i)
{list($value) =
45 matches
Mail list logo
