MySQL 5.1 : The Second Major Release of MySQL 5

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Mysql Forcing close of thread 946 user

My mysql box keeping shutting down and up. Below is snippet of the log file. There is quite a number of places I notice this Forcing close of thread 946 user: 130426 12:36:28 [Note] Event Scheduler: ...
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mysql pre-start process (23901) terminated with status 1 [closed]

I installed a new Mysql server version 5.1 on machine which was running on 5.0. Now when I try to start the mysql server using command service mysql start it gives me an error start: Job failed to ...
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why is MySQL 5.1 on ubuntu 10.10 not starting? [closed]

I just installed a MySQL 5.1 server on Ubuntu machine. after installation the server should automatically start but it does not start and gives me an error start: Job failed to start . Even when I ...
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2k views

Difference between show status and show global status in mysql

When I execute "show status" and "show global status" in MySQL at interval of 5 seconds , I got set of 291 results each time. But, value of some parameters are different. Below are the list of those ...
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132 views

Help Optimizing Query

For the following table structure in MySQL 5.1.49: CREATE TABLE `leads` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `institution_id` int(10) unsigned NOT NULL, `lender_id` int(10) unsigned ...
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723 views

Mysql master-master permission replication issue

I came to know it's safe to replicate mysql database to have the users and permissions replicated, from a post in ServerFault is-it-ok-to-replicate-mysql-db. I have setup master-master replication ...
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1answer
58 views

Conditional Counting

I'm analyzing a database of login records for a university and I'm trying to write a query that will give me an idea as to how many users are using the labs for short bursts, verse a more extended ...
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3answers
252 views

getting error while starting memecached service with ndb engine

i am installed memcached library by following the steps in the internet. now there is a binary file created in bin folder of mysql now i exicuting the command memcached i am getting error like this ...
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679 views

MySQL views and table locking (5.1 MyISAM)

I have a large (160 million rows, 50GB) table in MySQL 5.1 using MyISAM. If I were to construct a view defined by a fairly complicated query, would a SELECT on the view lock the underlying table?
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318 views

Mysql select ends with 'killed'

Okay, I'm sure this will turn out to be something dumb, but then I'm a dumb n00b DBA. I've got a largish table, about 163 million rows and something like 44 GiB. After some experiments with ...
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519 views

My SQL server showing different result with same query execution at different time

When I execute below query from MySQL server, it shows me different output for each time even though database is stable and not used by anyone except me. SELECT TABLE_NAME , table_rows FROM ...
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7k views

Why does max_used_connections status not get refreshed automatically once it reaches max_connections, even though the Threads_connected falls down

I always wonder, why does the max_used_connections value not come down, once it reaches the peak value of max_connections? I always flush the status and bring down this value to avoid DB connection ...
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15k views

Error Code: 1205 Lock wait timeout exceeded in MySQL

I have set InnoDB lock wait time-out to 120 seconds. When I run the query below for first time, it works fine. However, the second time, the same query with a different value gives me: Error ...
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2answers
4k views

How do you install MySQL 5.1.34 on CentOS 5.5?

I am trying to install Mysql 5.1 on cent OS. I researched a lot but could not find any link which gives step by step procedure. Everywhere, there are vague answers. Can someone please give me steps ...
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53 views

Master/Master/Slave Replication

Just trying to get some information on the best route to setup replication for this DB I've got. I'm using MySQL 5.1 I found this and it seems like the idea we have in mind. We're looking to have ...
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100 views

Fourth inner join to the same table increases query duration significantly

As soon as I add a fourth inner join to a specific table, the query duration increases significantly: sub 1sec to 45sec. The table in question is deployments d4. The SQL Query: select a.id as ...
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137 views

MySQL Function Error

In an inherited database I have two tables of current interest, records and logins. login tells me the location of the user and where and when his login occured (in and out times included). The fun ...
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1answer
156 views

Is there a way to recover this database (MySQL)

I did a "cold" (db offline, all filesystem files) backup of a MySQL db. I wrote the backup to an ISO image. Unfortunately Joliet filenames are not default. I didn't realize that until attempting to ...
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918 views

How to properly secure MySQL database?

We have a web application based on the famous triad apache + php + mysql which we sell to our customers and gets installed on their servers. Currently, we are using MySQL 5.1.41 which has only a ...
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1answer
1k views

Solutions to 4-byte utf-8 characters in mysql 5.1

I'm running into a problem that seems to be an issue w/ mysql 5.1s limitations on UTF8 characters. From http://dev.mysql.com/doc/refman/5.1/en/charset-unicode-utf8.html Currently, MySQL support for ...
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511 views

Lost connection to MySQL server during query

Here is a part of my query SELECT * INTO OUTFILE 'Target_File_Name' FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '' FROM (SELECT 'Start time','Calling no','Called ...
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383 views

why can I only install MySQL 5.1 on cent OS 6.2?

I had Ubuntu 10.10 on my server and MySQL 5.1 version. But since i wanted to update the system, I installed a fresh version of Cent OS 6 only so I could install the latest version of MySQL. But after ...
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3k views

How to install MySQL 5.1 on Ubuntu 10.10?

I researched a lot but could not find any link which gives step by step procedure. Everywhere, there are vague answers. Can someone please give me steps to be followed to install Mysql 5.1 ? It gives ...
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2answers
1k views

Client to use the slave when the master is down in MySQL replication

Is it possible for the client to use the slave when the master is down in mysql replication? I have already setup a simple mysql replication having a master and a slave. The client connects to the ...
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923 views

How to eradicate Mysql Slave Replication delays when huge updates from master

At my environment we had slave replication with mysql server version 5.1.47 enterprise version.When ever there is huge updates from master, slave is lagging behind the master. What is the best ...
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Problem with MySQL Master/Slave reboot when in replication

There is a master and number of slaves connected to it. Due to some patches, we have to Reboot the Master and Slave. Afterwards, we have to make sure replication is running fine. While doing this ...
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MySQL: OPTIMIZE TABLE vs. myisamchk

I have a very large table (~50GB) and periodically rows are purged from it and I want to run OPTIMIZE TABLE to recover the space. But I do not have enough space to run it. If I do run it the server ...
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1answer
39 views

mysql replication and innodb_file_per_table

Is it possible for the master (5.1) to have innodb_file_per_table = 0 and for the slave (5.1 or 5.5) to have innodb_file_per_table = 1 ?
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67 views

set global variable parameter?

My prod_server version is 5.1.47 and want to set the slow query log dynamically for certain period of time. I refered one site(http://toastergremlin.com/?p=276) there is mentioned below 5.1.6 we need ...
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165 views

One to many join, Sum from both table

I have two tables: orders and ordersdetail...(partial table) orders- id(primary key), amount, date( index) orderdeails- id(primary key), skunitid, quantity, order_id Each order has multiple order ...
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1answer
92 views

Using pt-table-checksum to compare a slave's DB to another slave

I understand that pt-table-checksum can do checksum compares between a master's DB and a slave's DB easily. However, let's say your master has two slaves replicating from it for the same DB, i.e. ...
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31 views

Do threads in cache still use memory?

I was studying about how and how much memory allocated to each connection thread and found below MySQL tutorial: http://dev.mysql.com/doc/refman/5.1/en/memory-use.html There is a point mentioned as ...
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35 views

MySQL Replication Between Three Hosts?

We have a need to move our Moodle server to a different host, and our current host runs a LAMP stack that likely runs on a VM. It is accessed most of the time. In the event that the current host ...
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1answer
840 views

MySQL replication error 1594

Is there a way to restart replication without going over MySQL :: MySQL 5.1 Reference Manual :: 16 Replication. I'm NOT seeing ANY errors on master and I'm not entirely sure why slave is ...
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1answer
101 views

What does this mean - ~/.my.cnf

When I run $ mysqld --verbose --help | less I got information like Default options are read from the following files in the given order: /etc/mysql/my.cnf /etc/my.cnf ~/.my.cnf As per my ...
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Does MySQL have a version of Change Data Capture?

We're in the process of phasing out an old system and migrating onto a new one. The last time that we phased out an old system, we ran both systems in parallel and integrated data between both until ...
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Unable to start mysql

I am using Oracle LINUX5. I installed MySQL 5.1.73 community edition through RPM command and it was working. Now, I stop mysql by running below command: $ mysqladmin -u root -ptmpassword shutdown I ...
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1answer
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MySQL master master replication, safe to delete rows on both masters?

We have a MySQL (v5.1.61) cluster with two masters (and two slaves). We have a table logs with a primary key column logID. This log table grows rather huge, and we'd like to delete data from it. So ...
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490 views

Different thread states in query execution

My MySQL 5.1 based Intranet system is facing very bad performance during high load. When observed through MonYog, I found below thread states: We can simply understand the different thread state by ...
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1answer
7k views

Selecting multiple columns from multiple rows in one column (subquery?)

I'm working with MySQL 5.1.68. I have a situation where I'd like to select rows from another table into a column. I'd like to output this: id # name # citizen_name (multiple citizen names) 1 # ...
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1answer
6k views

mysql trigger to insert/update date column from datetime column

probably simple question but can't get it to work: I have a table with two datetime columns. In order to set up a date index and have simpler queries, i have added two date columns next to them. ...
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1answer
1k views

UPDATE SET REPLACE() matches but does not change

I've seen another post about this exact thing but it's 1-1/2 years old so I thought I'd make my own...besides, the other post did not help me. What I am trying to do is pretty straight-forward. To ...
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138 views

Is there any query to fetch the a single row data in chunks?

The data stored in a row is just like "Phone Number:--- xxxxxxxxxxx Call Type:--- MISSED Call Date:--- 2013-06-13 Call duration in sec :--- 0 Phone Number:--- xxxxxxxxxxx Call Type:--- OUTGOING Call ...
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1k views

What would cause Mysql database entries to be truncated to 253 characters?

Randomly seeing database entries truncated to 253 characters on a php site and can't figure out why or if it could be malicious or a corruption issue. Any thoughts would be appreciated.
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2k views

Retrieve double data type value in non exponential form

Is it possible to retrieve non-exponential value in double data type column? After the width of the column is increased to 15 it shows the values in exponential form. Now I get the following: ...
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327 views

How do I restore 3 tables into a MySQL database from a single Windows dump file?

I want to import 3 specific tables from a dump file that contains 270 tables. The dump file, naveen_ifs_db.sql, is 20 GB. How do I restore 3 tables from that dump-file using the command line in ...
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912 views

MySQL Master-Slave Replication Cross Database

I am setting up Replication for cross Database as i have set 2 variables in Slave' s my.cnf as replicate-do-db=database_name and Replicate-wild-do-table=database_name.% ,But i am not able to get ...
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501 views

SHOW SLAVE HOSTS shows incorrect output

I had used --report-host option in one of my slaves, so that I could see that under SHOW SLAVE HOSTS. Now that server is no longer in use. I have uninstalled that server as well. Unfortunately I still ...
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1answer
307 views

MySQL lost records in a master slave scheme

We have developed a web application that uses two MySQL servers set up with replication (master-slave scheme). The application was to be used for a couple of days only, when ~ 50-60 users would enter ...
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243 views

time executing inserts + slow SSH

_ Hello, my setup is a slow SSH to some linux machine. From there I start a mysql terminal client and execute about 200k inserts (in a while loop inside a stored procedure). This takes about 3 hours ...