MYSQL :: Active Connections

Active Connections
i need to know how many connections and where they are coming from becuase my database is taking over the whole cpu after around 20 minutes the deamon has been started. it's very xtrange and i don't know how to work this out

i taught it was a windows problem but it's the same over linux

Getting Active Connections
i wanna get active user connections, means which users are connected to server.
i have seen it in mysql administrator software in server connections tab.

How Do You Find The Active Connections To A DB?
I'm using VB6 SP6 with MySQL 5.0.27.

From within the application, I'd like to be able to get a list of all users currently connected to the database.

Is this possible? If so, how?

Most Active Users Query
I have a site where users can post in different categories (topics, questions, answers, comments). There is a table for each of those types, and each one has a userId field on it.
I'd like to add a "most active users" section that shows the top 10 users with the most entries in topics + questions + answers + comments, but I'm not sure what query to use to get that information.

How Do U Extract Current Active SQL?
Has anyone found a way to extract the current active SQL from mysql. I wish to do this to performance tune the code. It is being compiled by a front-end application which I do not have access to.

Shifting Active DB From 1 Server To Another...
I'm after suggestions on the best way to go about shifting an active MySQL database (its for a web stats script) from one server to another along with domain transfer.

The problem lies in the time that the shift actually takes place.. i can put a copy of the script and database on the new server so that when the domain transfers, it'll just keep working on the new server... problem here is i dont know when the shift will take place, and will most likely lose some hours/ days of statistics.

Maybe if i can make the current script write to a database on the new server using the temporary ip address, and then when the shift takes place make the new script access the local db on the new server (same one as was being accessed before)... is this possible with php/mysql?

Is what i'm trying to do do-able, or should i just give up and accept the loss of a few hours/ days of information?

Escape Active Words
"I would like a select set of friends to enter into a conversation with"

and i try to add it to the database, this occours:

"I would like a SELECT set of friends to enter INTO a conversation with"

is there a way to escape the 'active' words such as SELECT and INTO so that they would be treated as plain text?

Backing Up Very Active MySQL Database
I'd like to know how some of you with very active MySQL databases (like large vBulletin forums) handle backups?

mysqldump raises the server load significantly and slows the site. I think I may lose queries here if they back up while it's trying to do the backup.

mysqlhotcopy complained about not being able to open some of the table files. I think it's running into locked files despite its attempts to lock them for itself as there are many queries per second on almost all tables.

This is a dual-core Opteron 280 server with 2GB RAM. The database is about 2GB in size right now, and all tables are MyISAM type. Are there any settings I should tweak to get mysqldump or mysqlhotcopy to do the backup without effecting live services, even if the backup takes slightly longer to run?

Converting Field Type In Active Database
When I designed my db in several tables I used unsigned integer fields
to hold an integer that each bit was a 'flag'. Now I realize that the
set field type does just what I was trying to accomplish. Is it safe to
convert the field(s) from uint to set and keep their current values?

Obviously all external programming (queries) will have to be adjusted,
but it seems to make more sense to use the set type.

Version Number Of Mysql On Active Web Site
how to tell the version of mysql I am using? I'm not technical and the person who installed this is nowhere to be found. But I do have access to the server. It is a 5.x on win2k.

Active Enable Root Access From Remote Machines
Who i can active the option "Enable root access from remote machines" in the files of configuration of mysql 5.

Too Many Connections
Sometimes during busy parts of the day, my site shows a 'Too Many Connections' error.
I know it's something to do with the maximum default being 100, and that I need to change it in the my.cnf file. However I can't find the file.
Can someone tell me, step by step, how to create the file?

Too-many Connections
i am using MYSQL database in my system.i have public IP like (202.***.**.**)ie accessed
10 people in my organization.after some time it is showing too-many connections.

actually that is used only 10 persons but in my.ini file max_connections=255 are
255 but it is showing always too-many connections error.at that time we are restarting the system the problem is tempararyly solved?
what is the permenat solutions for that?

by using showprocesslist; command showing the list it is showing 10 users why it is showing the too-many connections?

How Many New Connections
How many connections Mysql cal handle

max_connections= ?

To Many Connections?
My host reported an error and said that my script was allowing to many connections.
Is there something that should be coded to close a connection after a user leaves the site? I thought this was automatic, but I guess not?? I can't imagine there were more than 50 users at one time on this certain site.

MAX CONNECTIONS
My site hasavailable by default 15 connetions to MYSQL.
Many connections remain open for much time, so when a
new user enter the page it shows a message UNABLE TO CONNECT TO DB.

How do I avoid this, without need change the number of connections
of the server?

Too Many Connections
i have an visual basic data entry application that use mysql database.
the app is installed on 6 computers.after each computer enters 4,5 data sheets,it gives the error TOO MANY CONNECTIONS

for connecting to mysql i created a mysql user MIHAI with all the privileges and

max_Questions
max_updates
max connections

set to 0 , wich means no limit for connections right??

but still, the error message, TOO MANY CONNECTIONS.

i read on mysql site

"The number of connections allowed is controlled by the max_connections system variable. Its default value is 100. If you need to support more connections, you should set a larger value for this variable."

but if i modify the max_connection textbox in mysql administrator isnt it the same thing?

Max Connections
I have stupidly set the max questions/conections options to such a low number that its locked me out before i even got a chance to play with this new version. Is there any way i can reset all the options and just start again. I have tried uninstalling and deleting the service from windows but on reinstall it just gives the same errors.

20 Connections
Is it normal for mysql's performance to plummet when it hits about 20 connections? These connections are all from scripts running as cron jobs.

I have max_connections set to 500 and max_user_connections set to 35.

Too Many Connections
I have been using a certain php file to connect to a mysql database for some time, but the last time that I checked it for bugs, I got an error message "Warning: mysql_connect(): Too many connections in /home/yonni/public_html/cgi-bin/register.php on line 19. ERROR 3: The connection to the registration database is temporarily unavaliable: Too many connections" I have not changed the coding for the connection to the database since I first wrote it. The code for this part of the script is:

$dbh=mysql_connect("localhost", "*my username*", "*my password*") or die ('ERROR 3: The connection to the registration database is temporarily unavaliable: '.mysql_error());
mysql_select_db("yonni_") or die ('ERROR 4: unable to select the correct database');

Why has this error occured, and is there a way of avoiding it? There is noone else viewing the site yet, and I do not know what the problem is. Please help

2 Connections
I create 2 connectionsand then try to select the current active database:

$aaa_link = mysql_connect("host1","user1","pass1") or die(mysql_error());
$bbb_link = mysql_connect("host2","user2","pass2")or die(mysql_error());

mysql_select_db("dbname1", $aaa_link) or die(mysql_error());

However, mysql_select_db fails with error:

Access denied for user: "user2" to database "dbname1"

Too Many Connections
I am running a couple sites off a mysql server and I am currently having a too many mysql_connect error:

CODEWarning: mysql_connect(): #08004Too many connections

Allow Outside Connections
i need to be able to connect from one server to another... i need to know how to allow outside connections.
so i can use blah.com as the host instead of localhost
or is this turned on by defult in MySQL??

Too Many Connections (my.cnf Set To 3550)
I'm getting the following error in one of my scripts:

Warning: mysql_pconnect(): Too many connections in /home/filexoom/public_html/includes/mysql.class.php on line 5
mySQL: Too many connections on line 5 in /home/filexoom/public_html/includes/mysql.class.php

To fix the problem I've raised the max_connections to 3550 (had to raise it gradually), but it is still getting the error on occasion. I don't understand what's going on, I only have about 4000 users in the db. I have restarted httpd, mysql, and even the entire server after editting my.cnf. However I'm still getting the same issue.

I'm thinking perhaps the script is not closing the db connections, so there are a bunch that are still open, but should be closed. If so, is there anyway I can kill/flush all the current connections?

Question About Max Connections
I had a question about maximum connections to a database. How does that work? I've read different things about it. If I have a limit of 100 connections and 100 people are currently connected to the database, then 1 more can't...

or

Is it only during connecting that this issue comes around.

# Of Mysql Connections
I was wondering what you guys thought about this. How many mysql connections do you think is to many on a php page?

How Many Connections At One Time?
I am thinking about using a php persistent connection to my mysql database. there will be several thousand users, several hundred at one time. How many connections can i open to mysql simultaneously?

Multiple Connections
While running under XP my app did perform many successfully db operations. But after a few thousand or so updates and reads in a tight loop, it would eventually crash. A sample trace is included in a prior posting. Code:

What Are Connections And How To Manage Them
I have been using mySQL for several years now, but I currently developing a larger/broader usage website with intense mySQL contents usage.

I have been told that mySQL has a so-called connection limit of 50-70.

QUESTIONS:

1) What is a connection limit? Or... How do you count 1 connection?

2) How do you properly manage this, to e.g. handle a site that has 1000 simultaneous users logged in to a web site and interacting with the database.

Connections And Timers.
Is it possible to establish connection with other DB ie ORACLE and execute select and insert the result to the MySQL DB. If yes how to do it ? Are there avilable tasks which can be fired on the timer basis ?

Persistent Connections
I have a website that's getting it's ass kicked so I tried changing the DB connections to use mysql_pconnect instead of mysql_connect. After doing that, I started getting mysql errors left and right, all of which were claiming that a table didn't exist inside a certain database... basically it looked like it was mixing up connections. Any idea how I can avoid this?

No. Of Connections Open
I am using mysql 4.0.12 with asp.net 1.1...

I want to find no. of connections open for a given database using any query...

Do anyone has any idea?

Network Connections
I can connect to the database on my FreeBSD system, but not from another
system on my network. How do I set it up to allow remote connections?

How Many Connections Are Open?
We have a large database that has suddenly become extremely slow. It is running on Fedora core 4. How can I find ou thow many connection are open?

When I look at CPU usage thru CPanel this appears to use a lot of CPU, sometimes over 90%

/usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/mail.realivent.com.pid --skip-external-locking

Mysql Connections
I am currently running MySQL 5.0 on RHE3.

I would like to know if someone can tell me how can I get the total number of connections/session to the mysql server via the console or command line?

Slow Connections
I am using MyODBC-3.51.11-2-win on Win 2003 OS. I am not able to see all of the connections in the list under the System DSN tab. The connections that show allow the ASP pages to run at an expected rate.

However, the ones not showing in the list are running extremely slow. If I attpemt to recreate the connection I am told that the connection already exists and asks if I want to replace the existing connection. Wheter I click yes or no the connections do not show and the pages run slowly. How do I get them to show or resolve the issue. The ASP code is the exact same SQL statements and connection strings as the in previous applications.

Too Many Connections Error
I have been getting the following error consistently every few days:

Warning: Too many connections in /path/to/connection.php

I altered the max_connections in my.cnf to allow for 300 connections. I
am not using persistent connections with php. I used to use them but
got this too many connections error all the time, so I switched to
non-persistent connections, but they don't seem to be getting killed
off? I am using php to connect.

has anyone else dealt with this issue? Should I perhaps be closing the
mysql_connect() after running each query?

Selecting Across Connections
This is either a very simple answer or a very dumb question, i'm also sure there is alot of documentation on how/why not to do this possibly too much hence my issue with figuring it out.

I have a db on-site at locationA.
I have a db hosted online at locationB.

I want to schedule a query to run regularly (twice daily) that Selects into a table on db at locationB data from tables at locationA, the query needs to be executed at locationA.
I.e.

SELECT locationA.myonsitedb.tblMyTable.*
INTO locationB.myonlinedb.tblMyRemoteTable.*

Unfortunately, in my noobness I have no idea where to start here, I have no problem with the queries but I'm completely green to the setup of connections and how to query across these connections or how to setup the scheduling.

Aborted Connections
I get pages error logs with this message -
"Got an error reading communication packets". And the aborted clients are easily in hundreds.

Here is my set of configurations:
I am running Microsoft .Net 2.0 on Windows 2003 Server using IIS 6.0. I am using Mysql 5.0 with Mysql/.Net Connector 1.0.

Some of the settings on my.ini -
Connection timeout - 180
Wait timeout - 360
Max packet size - 10 M
Max connections - 5000 (pretty high, but set to be on a safer side)

When a perform a netstat -ao - I have lot many sockets open with TIME_WAIT status. On the MySql Command client - the Aborted clients average around 100's

The connection string from ,Net application has pooling=false with no help.

The webserver does not have a heavy load and has less than 5 users at any point in time.

On the registry settings, I have the max ports > 60000 and the time_wait setting changed to 30.

My application is opens a connection, performs a query and closes the connection and this is the fashion followed for all DB operations.

Too Many Faulty Connections [ Was Please Help ]
My website keeps telling me 'Cannot connect to dababase, too many fauly connections'

I saw that we can do this:

shell> mysqld_safe -O max_connect_errors=10000 &

But I don't run Linux, and thus can't do a shell command.

Does anyone know how to do this in windows server 2003?

Solutions For More Connections To Db
I'd liek to ask what are the soultions when there are a lot of
connections to the db ??
For examlpe in how are builidng the db for mmo web browser based games.

'Too Many Connections' Error;
I manage a Linux box that runs a small website and today, my clients got the 'Could not connect: Too many connections' error when they tried to connect to their CMS. Here is what I did:

1. Ran "show full processlist" from a mysql prompt and got the following info:

+-----+------+-----------+------+---------+------+-------+-----------------------+
| Id | User | Host | db | Command | Time | State | Info |
+-----+------+-----------+------+---------+------+-------+-----------------------+
| 405 | root | localhost | NULL | Query | 0 | NULL | show full processlist |
+-----+------+-----------+------+---------+------+-------+-----------------------+
1 row in set (0.00 sec)

In other words, there was only one person logged on, and that was me. I ran this a bunch of times during the day and this was all I ever saw.

Multiple Connections
I am observing some problems:

1) It seems to be a consistency problem. Updates that are performed by
the process that updates the databases are not always seen by the
clients.

2) Sometimes, it seems that some tables get corrupted, as clients get
errors relative to the table handler.

Persistant Connections
when installing oscommerce i noticed that it had an option - enable persistant database connections. How does this differ to 'normal' connections, and how would this be implemented?

Dual Connections
I am developing a PHP script that needs to connect to two different databases in one script. There is one catch, however. One database is on a local computer (laptop). The other database is on a server 1,000 miles away.Is this possible?
In case you are wondering why I need this capability:

This application allows a user to enter data into a database on their local computer (laptop). With the click of a button, I want to transfer all of the data from the local database to the database on the server. Therefore I need to connect to the local database, loop through each record, copy it into an array. Then I need to connect to the server database, loop through the array, and insert each row into the server database. This must all be in the same script.

Get The Number Of Connections
Is it possible to determine number of connections to a particular
database in MySQL? If yes..can anyone show me the way to do it in DML
or normal query form?

Database Connections
i have a general question using the mySQL database.
Lets say I have 10 database queries in my application. The 10 queries do not happen one after the other in a short time, so it can be that between one and the next query elapse seconds, or minutes, depending on e.g. user actions of my application.
Well, should I open and close a connection for every query or should I open one connection in the beginning of my apllication, then do the ten queries with the same connection and afterwards close the connection again?
I think both is possible, but what is 'best practice'?
Is it a matter of speed from/to the database

MySQL Connections
A shared hosting provider allows to setup 10 MySQL databases. The only thing is that each database is forced into having its own username and password, which means a separate connection has got to be made to each database.
Is there a way to join tables over the two connections