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How Much Time Can I Set In Wait_timeout In Mysql(wait_timeout Variable)


tha defalut time for wait_timeout in mysql is 8 hrs...can i increase this time to 3 days ,,or 3 months........




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Related Forum Messages:
Adjusting The Wait_timeout Variable
I am unable to alter the wait_timeout variable. Following are the approaches I tried:

1) Added the line "wait_timeout=900" in my.ini.
2) Added the line "set-variable wait_timeout=900" in my.ini.
3) Used "set global wait_timeout=900" through a client.
4) Used "set wait_timeout=900" through a client.

None of the methods yeilded any fruit. Only the last method (4) seemed to effect the vairable but the problem is, the change lasts only as long as the session does.

Following are the relevant details: -

MySQL Version: 4.1.7-nt
Platform: Windows XP

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Wait_Timeout
I want to ask what is the relation between system variable wait_timeout ( or/and interactive_timeout ), mysql_pconnect function and aborted_clients variable you see when you call mysql > SHOW STATUS; ? When I set wait_timeout=50, I had many aborted_clients, so I returned to wait_timeout=28800 and reduced the number. In what metric is the number of wait_timeout variable ?

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Wait_Timeout Problem
I set a lot of variables in the my.cnf file, all variables are set (I
checked it with "show variables") except of wait_timeout. If I set the
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Does anybody know why this could happen?=20

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Configure Wait_timeout
I am using MYSQL version 5.0 (5.0.46). I intend to configure wait_timeout variable by updating the my.ini file(WINDOWS XP). But the value updated in this file is not getting reflected when checked in MYSQL command prompt.

I did restart the MySQL Service after updating the .ini file.

1. Path of my.ini file : C:Program FilesMySQLMySQL Server 5.0

2. Contents of my.ini file
Expand|Select|Wrap|Line Numbers

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Sleeping Threads Even With Wait_timeout On Server2003/XP
Currently we are running MySQL 4.0.17-nt on a Server 2003 machine. I am having a problem with connections hanging around in a sleep state, and building up over time. Eventually websites start returning a "No More Connections" error. Our websites are ASP.NET, and we are using the CoreLab MySQLDirect.NET component for the .NET interface. Our code opens and closes each connection explicitly using that API, but occasionally ASP.NET worker processes start a new thread and one of
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How Do I Change Max_connections And Wait_timeout Variables Globally
I keep getting the famous 'Too Many Connection' Error, and don't know
how to change my variables, so they persist even if i have to restart
mysql service.

Platform: Windows 2003 Server
My Program is a WebApplication that is written in VB.Net
Using ODBC and OLEDB to connect <- (don't blame me, i just took this
over)

From what i have read so far, the problem is that i need to change
some settings to prevent my connections from being open for the
default of 8 hours.

So I am trying to change the following setting once and for all to:
max_connections=300
wait_timeout=2

(I'm not 100% sure that this is enough, but i guess i have to play
with these settings to find the right balance. We currently only have
about 400 Hits per day. Each Page is making about 1-4 calls to the
MySQL DB)

Now, if i restart the MySql Service, I don't want to have change this
again through script or whatever. I already changed the values
(actually added them) to the my.ini file, and i could not find a
my.cnf file at all.

So, is there one place that i can make this change for good? or is
there a certain syntax that i need to use? Could you please give me
some high-level instructions?

What i do know: --------------------------------------------------------------
-I do know that i would need to log on as root, and make this change.
-I do know that the service reads its values from my.ini - and
supposedly uses any overrides from a my.cnf file. (I was not able to
find the my.cnf file)
-I do have the latest (4.0) version of MySql on the server.

What i tried already:
1. I added 2 lines to the my.ini file
max_connections=300
wait_timeout=2

2. I logged on as root and ran:
SET GLOBAL max_connections=300
SET GLOBAL wait_timeout=2
Then i ran the mysqladmin.exe and created the Report of the variables:
The Report states that i got
max_connections 100
wait_timeout 28800
(Grrr!)

Also, I cannot make drastic programming or connection changes in code
because i am in the process to move the data layer over to SQL Server
2000.

Sorry for being ignorant here, i have taken this project over and am
no expert on mysql.

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thanks

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while ($row = mysql_fetch_array($query)) {
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SET @tcslot = "my_column";
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Quote:

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Here is my code:
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$result = @mysql_query ($query);

When I print $record I get the resulting number from the recid but when I put it into the query I get nothing. When I print $query I get nothing for $record. I'm very confused...

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PHP

$SQL = "INSERT INTO users (uPassword)
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"check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE (uName='test')' at line 3"(where 'test' is the variable stored in $userid).

1. Is it possible? If so how? What is the syntax?

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Im just trying to help my girlfriend get a query done.

What she needs is pretty basic, select the total count of issues on table issues, the total count of projects in the projects table, divide them to get an average of issues per project, and then do a select that displays all projects and that project's issue count, compared to the average issue per project count.

I just dont know the syntax to do it in sql, here's what i have.

SELECT @NumberOfIssues:= COUNT(iss_id) FROM issue;

SELECT @NumberOfProjects= COUNT(proj_id) FROM projects;

SELECT @averageOfIssuesProj= @NumberOfIssues/ @NumberOfProjects;

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from issue
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I have a small question concerning mysql! I would like to create a stored procedure that will take as input the teable name from which to select all columns. something like
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i want to use variable from main query in subquery.

SELECT
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in mysql 4.x it works fine however 5.x cant find THEPROBLEM

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I tried to insert some large amount of text in mysql and used "Long Text" data type.

But I am not able to insert a text that is having about 1.2 million characters in it.

It is showing an error: "DBD::mysql::st execute failed: Got a packet bigger than
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Currently im using the code below to print the database values in a table. But what this doesnt show is the variable names (ie. column names).

Anybody know a way I can do this?

print "<table border=1>
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print "<tr>
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print "</tr>
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I have a mysql query like this: SELECT SUM(num1), SUM(num2), SUM(num1)/SUM(num2) FROM mytable

I want to reuse the value from SUM() by assigning to a temp variable, so I don't need to redo it again later.

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It is posible to use a variable from a select statemens as a column name in the same statement.

crete table test (s1 int(1), s2 int(2));
insert into test values(10, 20);

create table test2 (t1 varchar(2));
insert into test2 values('10');

this works
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| 10 |

but i like to do something like this

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result:

| s1 |

where concat('s', substring(t1,1,1)) would give me the column name s1 but mysql take this variable as literal string, and i need the value of s1.

if t1[0]=1 it would select the first column (s1) from table 2
if t1[0]=2 it would select the second column (s2) from table 2
and so on ...

i need to use 's' or any other character in column name because column names are not allowed to start with numbers.

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MySQL Limit Offsets As A Variable, Or Better Paging Technique
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Example
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Is there any better technique to paging (on the database side, not on an application level)?

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I tried with this :

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I tried something like that but got a syntax error.

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I have a form set up with a dropdown list of values for a field "Genre" in my database

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$Genre = $_POST['Genre'];

echo "<h1> Query result for Genre = ","$Genre", "</h1>";

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I'm trying to use the $Genre variable in a mysql query to select records which match.

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class CDataBaseConnection
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I have a table that stores failure information of external application. The time stamp of every failure event is stored. Now I'd like to make some system performance & reliability statistics calculations based on time stamps in certain recordset; mean time between failure MTBF, down time DT, etc.

Example:

2007-09-27 12:23:52
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Time Format Military Time
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i was not given instruction, but rather some codes to rerun queries.
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select count(*) from CustomerHistory where tsCreated>='2001-05-01 00:00:00' and tsCreated<'2002-01-01 00:00:00'

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Could anyone give me a little run down? the reason i chose mamp becuase it thought it would get me off the ground quicker, now ive lst my book its put me back a good half a week!

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Access->MySql Time Format
I am in the middle of transitioning some databases from Access to MYSQL. Until our apps can be rewritten I have created an app that moves data from the current Access db to MYSQL on a daily basis.
Problem:
All fields come across ok except the time fields in Access. Times in
Access such as 12:37:01 AM are appearing in MYSQL as 37:01:00. The field in
MYSQL is Time with default 00:00:00.
Has anybody encountered this or have a solution? I use ADO and VB as the
application mechanisms.

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