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Queue Size Affect MySQL On RedHat


i want to know if the system parameter somaxconn affect the capabalities
of MySQL to maintain more than five thousands of HTTP connections ?




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Related Forum Messages:
How Listen Queue Size Affect MySQL On RedHat
i want to know if the system parameter somaxconn affect the capabalities
of MySQL to maintain more than five thousands of HTTP connections ?

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MySQL Queue / Messaging
I would like to implementation an application that will connect to a MySQL DB and just monitor a table if a new row is being inserted. If a new row was inserted a sub_method will be triggered. Otherwise, the application will just be idle. Can this be done with MySQL?

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Order By Having No Affect
I have the following query:

SELECT a.awardId, a.linkId, a.award, a.awardDate, a.dateCreated, a.dateModified, a.orderBy, c.pageTitle, u.username
FROM lnk_content_awards as a
INNER JOIN tbl_links as l ON a.linkId = l.linkId
INNER JOIN tbl_content as c ON l.contentId = c.contentId
INNER JOIN tbl_users as u on a.cuID = u.uID
ORDER BY l.orderBy

the query runs fine, but the ORDER BY is having no affect on the order of the records, can anyone shed any light on why this is happening?

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Mysql On SMP CPU Under RedHat
I have a 2xPIV Xeon box under RedHat 8 system and want to use mysql 4.0.14. How I should setting mysql for best perfomance ?

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MySQL Redhat
I have installed MySQL 3.53 on two RH7.3 and one RH9.0 boxes.
On one of the 7.3 and the 9.0 box, when I try to connect remotely, it
takes about 45 seconds to connect, whereas the other 7.3 box connects
almost immediately.
The fast box has standard install of 7.3 with tomcat added.
The 9.0 box is straight RH9.0 standard install.
I can't find anything in common between the slow boxes, but not on the
fast one.

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Mysql For Redhat 9
im planning to have a mysql server in redhat 9. my question is from the list on the download page of mysql, what should i download? there seem to be so many mysql for linux and i cant find the one for redhat 9.

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RedHat 8 And MySQL
I recently ran across an interesting problem, and I'm curious as to whether any of you out there have had the same problem.

A friend of mine was trying to get his MySQL server running on RedHat, and was having a difficult time. He could not connect from his windows workstation. After a short look at his user table, I could see it was set up to only allow local connections (an obvious default security measure). This is where it gets wierd.

From a SSH session, I created a super user with full rights to all databases on all hosts (allowed login from any host). But my friend still couldn't connect from his workstation. I finally realized that the mysql daemon is appending '@localhost' on the supplied username no matter what the user supplies. Thus, a non-local connection fails.

Perhaps I'm missing something here...I am obviously not a MySQL expert. But I was able to get my MySQL running very quickly on my Mandrake 9 box. It seems RedHat has made some changes to its distribution of MySQL. I'm not sure what to do next.

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MySQL On Redhat Linux
To make a long story short, let me say I had MySQL working on Windows 98
and everything was fine. Well, I took the big leap and removed all
traces of Windows and Microsoft from the computer. (hooray!) Once I had
Linux running OK, I downloaded and installed MySQL using an RPM package.
I guess the server is running (it says it is every time the computer
starts and it stops successfully every time the computer shuts down)
however, I cannot figure out how to get the MySQL prompt.

I've searched the entire hard drive for MySQL, mysql, MySQL*, mysql* and
probably some others, too. The only thing I found was a shell script
called mysql that starts or stops the server if I am logged in to Linux
as root. I cannot figure out how to start the interactive program that
allows me to make select statements, inserts, updates, etc.
I'm wondering about some things:

Did I download and install the wrong thing?
Am I just not looking for the correct thing?

Did I install it incorrectly?

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RedHat 9.0 MySQL, PHP CREATE
I have a RedHat 9.0 web server setup for intranet use. When the webmaster tries to use his CREATE DATABASE and CREATE TABLE scripts it tells him that he doesn't have the permission to do it. I've given all the necessary permissions to do it, I think. Any suggestions?

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Installing Mysql-administrator On Redhat
I am unable to install mysql-administrator on Redhat AS 4.

#rpm -i mysql-administrator-1.1.6-1.i386.rpm
erreur: Dépendances requises:
libstdc++.so.6(GLIBCXX_3.4.4) est nécessaire pour
mysql-administrator-1.1.6-1.i386

But I already have the library:
#ls -l /usr/lib/libstdc++.so.6
lrwxrwxrwx 1 root root 18 nov 16 17:27 /usr/lib/libstdc++.so.6 ->
libstdc++.so.6.0.3

Anybody have had such installation problem?

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MySQL As Part Of RedHat 9 Install
When I did my RedHat9 install, I choose Workstation and customized the
packages I wanted install. As a part of that customization, I chose
mySQL DB; however, I can't seem to find any RedHat documentation that
says how to get to these installed packages. I would like to just start
using them, but not sure where to start. Any hints to get up and going
quickly?

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Activating MySQL In RedHat Linux 9
After being absent for a while now I'm back with this question: Does anyone know of any guide on how to start mysql on Linux? Actually I was writing a long complain that mysql doesn't run on linux! But during the writing I could sort of fix it! Now it works, but only the mysql & test databases are not active coz their directory isn't created. I think I can do something for it myself! I just wanted to know if any of you went through the same experience: running mysql that is already installed with your Linux package, not grabbing a new mysql and deleting the old one and installing the new one!

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Creating A Queue
I am working on a queuing system in which I insert records into a database table that begin with a status='U' for Unprocessed, status='P' for Processing and status='C' for Completed.

I am currently doing a SELECT * FROM queue WHERE status='U' LIMIT 1;.

I immediately run an update on that record to UPDATE queue SET status='P' WHERE id=ཆ'

This seems to work great if I only have one process pulling items from the queue. However, if I have multiple processes running at the same time, there is the possibility of pulling the same record twice before the UPDATE occurs. Is there a way to prevent this other than by locking the table?


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Java In Linux (Redhat 9) To Access MySQL
Using a Java program, I can connect to the test database in MySQL. The
test database is installed using a MySQL utility, and it can be accessed
by any user without supplying a password. The relevant lines in my Java
(Java version 1.4.1) code are:

Connection con = null;
String url = "jdbc:mysql:///test"; // <== no user or password specified
con = DriverManager.getConnection(url);

However, when I try to connect to the accounting database (built as one
follows the Larry Ullman's "MySQL" book), the program fails. I need to
supply a user and a password. The relevant lines are now:

Connection con = null;
String url = "jdbc:mysql:///accounting?user=root&password=pswd"; // <==
con = DriverManager.getConnection(url);

I cannot get a connection. The error message is:

"Invalid authorization specification: Access denied for user:
'root@thorvald' (Using password: YES)"

(thorvald is my machine name.)

I have tried all sorts of variations on the url, trying to access the
accounting database, with no success. I can use the same user/password
of root/pswd within the mysql monitor to access anything I want.

Any ideas?

Again, I am using Linux (Redhat 9) , Java 1.4.1, MySQL 4.0.13, and the
MySQL ConnectorJ 3.0.8 (for Java access to MySQL).

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Multiple Mysql Servers On Linux RedHat
I am trying to figure out how to install 2 different versions of MySQL, 4.x and 5.x on a Redhat 3 server.

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Creating A Queue Read-out.
I am trying to create *what should be* a simple result of where a person is in line, but I am having a lot of trouble. I have spent hours searching, and for one thing I don't even know what to search for. So here's what I am trying to do...

Let's say I have rows 1-10 in a database and rows 2,5,6,9, & 10 are all marked with '0' and the others with '1'.

If my $ID is '6', then my code would print out < 3 of 5 >.

Here is the code that I do have...

$num_in_line = (I don't know what query to put here.)

$of_total = mysql_result(mysql_query("SELECT COUNT(ID) FROM all_programs WHERE list = '0'"),0);

echo $num_in_line.' of '.$of_total;

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Cannot Start New Install Of MySQL On RedHat Enterprise Linux
I've recently installed MySQL and PHP using YUM on a RedHat Enterprise Linux (RHEL 3) box. The output from rpm -ql | grep -i mysql shows the following are installed: Code:

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Out Of Memory! Callback Called Exit. END Failed--call Queue Aborted
The program will process info from users and than use LWP to connect to another site and feed the information.

When I use the same system to connect to 2 different sites using LWP, I receive the following error:

Out of memory! Callback called exit. END failed--call queue aborted

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Size Of Indexes Versus Data File Size
I am adding indexes to a table with about 200,000 records. Every field indexed adds about 2MB to the index file (*.MYI).

The index file is around 8MB and the data file is around 10MB.

Is there some optimum ratio I need to know about?

(I have examined the queries and am indexing field used in WHERE, ORDER BY and GROUP BY clauses.)

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Where To Get My SQL For Redhat 9
where can I get a free copy of My SQL. I'm running Redhat 9.0 on my
laptop. I looked at www.mysql.com but was a bit confused as to which
package I need to download.

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Install On Redhat 9.0
Could someone tell me how to install mysql in my home pc which runs redhat 9.0 as a operating system.

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Thread_stack On Redhat 8.0
I saw this section in mysql manual.

"If you are using Red Hat 8.0 or a new glibc 2.2.x library, you should start mysqld with
the option --thread-stack=192K. (Use -O thread_stack=192K before MySQL 4.) If you
don’t do this, mysqld will die in gethostbyaddr() because the new glibc library requires
a stack size greater than 128K for this call. This stack size is now the default on MySQL

4.0.10 and above."

I am using red hat 8.0. Mysql is started automatically when my machine is started. How should I set this variable. Can I add this to my.cnf file and restart mysql. If so how should(format) I add it to the my.cnf file.

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What Shoud Be Version On Redhat 7.3
I have installed as OS (Operating System) Linux Red Hat 7.3. My issue is that I don't know what kind of MySQL should I download to install on it. Would you tell me what version from Community > Downloads > MySQL Community Server > 5.0 ,I must to download ?

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Replication Error On RedHat AS 4 ( 5.0.33)
I download the newer MySQL version 5.0.33. And i compile it for multi-threads support on my 64 bit Redhat AS 4 running on DELL 2950. Everything is fine while installation time.

But error occues when another slave MySQL contact this new MySQL version master. After trying, I found out some kind of error "ONLY" happen on 64 bit RedHat AS4 and running with mult-threads MySQL.

I wound not wanna downgrade my 64 RH4 AS to 32. Although "Non-Multi-thread" MySQL can well run on my 64 bit RH4 AS, multi-threads MySQL still my prefer if it can work out.

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Connect Mysql5 Using C++ In Redhat-linux
how to connect MySQL using C++ in redhat ....

can any one tell a sample of code to creat ,connect and execute the
statement in c++ code ...

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Installation Problems On RedHat EL4 On Ia64
I'm running RedHat EL4 on an ia64 system. I've been using
PostgreSQL for a while but I now have an app that I think
requires MySQL so I wanted to try it out.

I tried installing MySQL-server-standard-5.0.18-0.rhel4.ia64.rpm
and I get an error that it conflicts with mysql-4.1.7-5.RHEL4.1,
so apparently I've already got MySQL 4.1.7 on the system.

I want use PHP with MySQL, which means I have to configure PHP and
tell it where the MySQL headers are. But I don't seem to have
headers, at least not that I can find.

I tried uninstalling MySQL 4.1.7 first but it says that dovecot and
perl depend on it. I tried installing the "headers" rpm for 4.1
but the only one I found was 4.1.18 and rpm says it conflicts with
mysql-4.1.7-5.RHEL4.1.

So, any suggestions? I don't think I'm currently using MySQL for
anything, but I don't want to break perl. I'd like to get 5.0
running. I just don't know enough about Linux and RPMs to be
confident that I can uninstall 4.1 and install 5.0 without screwing
something up.

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Mysqld_multi Don't Starts Groups On Linux RedHat 9
mysqld_multi doesn't start the two groups if I gave this command imediately after stopping them.

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What Is The Max Size Allow For Mysql???
when I dump my db (as in mysqldump) I realize that the size of file is getting big (I guess this is one of the database's nature - to grow :-) ).

Right now the size of my db is 200Mb and my estimation that it will grow in 800Mb/Per year (so it'll reach 1Gb by the end of the year)

Question: what size would it be wrong to use mySql? I mean, if my db size is 3Gb am I ok? should I expect performance issues? or it doesn't matter.

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The Size Of MySQL
I've been thinking of using MySQL but after downloading it to test it out I see that its over 25MB in size. Why is it so large? (Of course relatively speaking.) If I dont need *anything* fancy, just simple storing and retrieving of information, why would I need such a large type of database?

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Size Of MySQL Row With PHP
Is there any way in php to display the size of a row from a table in Kb? Cant find anything online, but i'm assuming it can be done.

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Size A MySQL Server
I've got a question about how to size the server hardware for a MySQL
system that I've got to buy and build. We're going to be putting a
database on MySQL that will contain upwards of 20 million rows of data.
This data will be used by Java applications running under Tomcat to
provide web pages, Java data objects and probably most importantly SOAP
web services. The total number of concurrent users of this data is not
know, but could be thousands / hour. The database will be essentially
read only, no transactions or updates by users. The whole thing will be
running on a RedHat Enterprise Linux AS server. What I'd like to know
is what kind of machine should I be buying; CPU speed wise, memory size
wise and disk size? My initial impression is that the requirements I've
outlined above could be handled readily by even a modest machine, but I
wanted to ask for feedback in case my impression is wrong.

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Table Size In Mysql
how many records can i put in a mysql table. i need a table with more than 50,000,000 records (just 4 short fields, it's basically a log with id,action,date,result).

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Mysql Table Size
i read the mysql manual and it's explained the maximum table size in many
operating system, but i can't find the maximum size for MS window (win32),
what's the maximum table size for win32?
My office want to migrate the database server to mysql, and it's contains a
millions record. Can mysql hold up tables with each have millions record?

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> Mysql Table Size?
i read the mysql manual and it's explained the maximum table size in many
operating system, but i can't find the maximum size for MS window (win32),
what's the maximum table size for win32?

My office want to migrate the database server to mysql, and it's contains a
millions record. Can mysql hold up tables with each have millions record?

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Size Of A Mysql Query
What is the maximum size (in characters) you can query in mysql (4.0)
I am making a dynamic generated query in php, which may cause the query-text to become very big.

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Mysql Database Latent Size
We tried 2 techniques to mesure db size and both fails to return
realtime size.

a) under innodb, we ’show variables’, find the innodb_data_file_path
variable and parse the size (works only if not autoextend) and we
substract the ’InnoDB free: ??? kB’ from the Comment field of ’show
table status’.

b) for all monitored tables, we figure:

indexFree = indexLength/dataLength * dataFree

and we sum up:

dataLength-dataFree + indexLength-indexFree

In both case the size is fair, although not perfectly equal (method A
reports bigger size), but the growth is comparable.

The problem lies in the accuracy of that info. We do bulky deletes,
removing 10 to 40% of rows in many tables.

First bug, the size of the DB is not quickly following the ’delete’
statements (it may decay for 20-40 minutes after the statements
completed!!).

Second bug, the DB size is not changing for 1-2 hours even though we
inserts a lot.

(We are talking about a few 10 millions rows tables in a 40 gigs
InnoDB space, getting ~500 inserts/s, ~2000-5000 deletes/s)

How can one mesure the DB size more in real-time, and avoid/account
the latent period where growth seams abscent?

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What's The Maximum Storage Size Of Mysql
what's the maximum size of data that mysql can actually sustain to by any chance?

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Reducing Mysql Database Size
I run 4 forums and have 4 mysql databases of 100mb limit each.

It has come to my attention today that 1 of my forums had increased to 110mb in size, so I deleted a section of my forum which has 18,000 posts in which reduced the mysql database down to 85mb.

In contrast one of my other forums has twice as many posts yet is only 50mb in file size so I cannot understand why this forum which has less data has a mysql database of 85mb ?

I have checked all files and optimised the database and this has only brought things down from 110mb to 81mb.

What I do not understand is, is how come I already have a forum which is identical and has more posts yet is much less in database size, and how can I now go about reducing this one which is dangerously close to its limit.

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How Do I Change MySQL Packet Size
How do I change MySQL Packet Size. It is currently set at 1m. I'm new to this so be gentle.

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Mysql 4.x DATABASE Size Estimate
If i had a php forum that used mysql 4.x and I had 145forum posts with 500characters and a 450KB image in EACH and every post.

how many Megabytes would this take up in the MYSQL database Approximately?, because I know mysql database compresses the images and forum posts etc.I need to know this so I can decide what size HARD DRIVE to get for my server.

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Setting Linesize And Column Size In MySQL 4.1.1?
In Oracle, you can set the iinesie and column size so the screen output looks nice and uniform. What are the equivalent commands in Mysql 4.1.1?

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Maximum Size Limit Of MySQL Database?
What is really the maximum size limit of MySQL database? If we are designing a specific program that is projected to last for a longer period of time, and we will be using MYSQL database, we often ask our mind, how long will it stands to hold millions of records.

Got any brilliant ideas or tips, wherein we can maintain mysql performance and even the records go heavy, it can still perform its best.

Can it hold millions of records? what should be done inorder not to make it crawl after 2 or 3 more years?

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What Parameter Control Mysql-bin Logs Size?
ls -althr Unix file system listing of bin files.
1.1G Mar 27 08:53 mysql-bin.000010
1.1G Mar 27 19:48 mysql-bin.000011
1.1G Mar 28 01:28 mysql-bin.000012

I see ALL my mysql-bin logs are about 1.1Gb in size and there must be an parameter that tell them to switch when It reaches this value but I can not see which parameter that controls this in ‘show variables’ or my.ctf - I would suspect it was max_binlog_size but the value does not come close to 1.1.G – do ANYBODY know what tells them to be 1.1G in size?

mysql> show variables like '%bin%' ; ....

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Disk Size Of Tables[or Database] In Mysql Or Oracle
how can i know disk memory occupied by database[tables] in mysql or oracle.

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Does Mysql Store Max Size For Data Type Each Time, Or Only What Is Needed For Specific Data?
If I use MEDIUMTEXT, which (if I understand correctly) has a max size of 65k, does mysql use the entire size each time data is written to that column? I have a text field on my site that users fill in, but more often that not, they don't. However, when they do, it can be 1000 bytes or more. Am I wasting space using MEDIUMTEXT or does mysql only set aside 1000 bytes for that column if the data is only 1000 bytes?

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DB Size
i have a problem with my db Import maxsize (2.048KB) and i want to make it 12.000KB. How can i do it.

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How To Set The Size For 5.0?
I would like to try to set set the size of MySQL for 5.0,however, I haven't found how to do that?

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Size
What is the Size limit to MySQL can it have 200 gigs of data?

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Max Table Size
Basically whats the maximum table size in GB that MySQL allows? We are developing an application that streams content - The streams are created by a CMS from a raw file that gets uploaded by a user - These raw files are stored in the db by the app. In Oracle i'm used to creating mutiple datafiles that make up a tablespace and so no singe data file ever really gets that big. Is the same approach applicable in MySQL and if so how big can you go?

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