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  • Tuning MySQL to take advantage of a 4GB VPS

    - by alistair.mp
    Hello, We're running a large site at the moment which has a dedicated VPS for it's database server which is running MySQL and nothing else. At the moment all four CPU cores are running at close to 100% all of the time but the memory usage sticks at around 268MB out of an available 4096MB. I'm wondering what we can do to better utilise the memory and reduce the CPU load by tweaking MySQL's settings? Here is what we currently have in my.cnf: http://pastie.org/private/hxeji9o8n3u9up9mvtinbq Thanks

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  • mysql query query

    - by nightcoder1
    basically i need to write a query for mysql, but i have no experience in this and i cant find good tutorials on the old tinternet. i have a table called rels with columns "hosd_id" "linkedhost_id" "text link" and a table called hostlist with columns "id" "hostname" all i am trying to achieve is a query which outputs the "hostname" and "linked_id" when "host_id" is equal to "id" any help or pointers on syntax or code would be helpfull, or even a good mysql query guide

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  • Books for experienced .NET developer learning PHP/MySQL

    - by webworm
    Hi All, I am an experienced .NET developer (C#/ASP.NET) looking to broaden my skills to the PHP/MySQL arena. I would like get recommendations on books for learning PHP/MySQL that are geared towards someone who is already familiar with object oriented programming and web development. I do realize that there are lots of online material out there but I am looking for an actual print book I can read. Thanks a bunch.

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  • Upgrading mysql from 4.1.22 to 5.0

    - by Arsenal
    Hi, I'm trying to upgrade our company's 4.1.22 version of MySQL to 5. I'm using sudo yum --enablerepo=centosplus upgrade mysql* but keep getting an error of conflicted files with the 4.1 version. Does that mean there really isn't any other way than uninstalling 4.1 and installing 5.0? I have read that using the yum upgrade command should work however... Thanks in advance!

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  • MySQL InnoDB insertion is very slow

    - by dharmapurikar
    We use MySQL server 5.1.43 64-bit edition. InnoDB is used as engine. We have a sql script which we execute every time we build the application. On ubuntu machine with MySQL server and InnoDB engine it takes about 55 seconds to complete the execution. If I run the same script on OSX, it takes close to 3 minutes! Any ideas why OSX is so slow while executing this script?

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  • Is there any performance difference between Debug and Release?

    - by Lazlo
    I'm using MySql Connector .NET to load an account and transfer it to the client. This operation is rather intensive, considering the child elements of the account to load. In Debug mode, it takes, at most, 1 second to load the account. The average would be 500ms. In Release mode, it takes from 1 to 4 seconds to load the account. The average would be 1500ms. Since there is no #if DEBUG directive or the like in my code, I'm wondering where the difference is coming from. Is there a project build option I could change? Or does it have to do with MySql Connector .NET that would have different behaviors depending on the build mode?

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  • MySQL index building performance

    - by Christian
    I tried to build an index over a two columns of a 30,000,000 entry database. I canceled the process after ~60hr as it didn't seem to work. For some reason MySQL takes only 22 mb ram instead of using the RAM fully. Is index building an operation that needs no Ram or is there some way to tell MySQL to use more RAM to be faster?

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  • select similar values from mysql database

    - by mathew
    Hi I have several data s in MySQL database. In my table there is a column called rank. what I want is when some one enter a rank say 25 then the result should display names on similar(+ or -) ranks LIMIT to 10 from table. example mathew - 25 john - 26 joe - 25 stewart - 27 kelly - 24 brandon -23 magy - 22 .......etc. Thanks Mathew

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  • Mysql ninja tricks

    - by alexn
    Hi, what are your mysql ninja tricks? What features are extra special? I'm starting with ORDER BY FIELD which enables you to sort in a particular order, like this: SELECT url FROM customer ORDER BY FIELD(customer.priority, 1, 2, 3, 0) Features like this is hard to find in the mysql documentation. Bring it!

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  • Convert MSSQL Varbinary field to MYSQL, keeping data intact

    - by Mike Sheridan
    I was given the daunting task of converting a ASP website to PHP and MSSQL to MySQL, and I ran into an issue that hopefully somebody can help I have a user table which has a password field with datatype Varbinary(128), are using pwdencrypt to encrypt the password. Is there a way to transfer that over to MySQL, and somehow i need to be able to keep the password intact... how can i go about that? any pointers would be greatly appreciated!

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  • MySQL query to view vertical data

    - by wenkhairu
    I have MySQL data that looks like this: +----------------------------------------+ |Name | kode | jum | +----------------------------------------+ | aman |kode1 | 2 | | aman |kode2 | 1 | | jhon |kode1 | 4 | | amir |kode2 | 4 | +--------------------+-----------+-------+ How can I make the table look like this one, using a MySQL query? kode1 kode2 count aman 2 1 3 jhon 0 4 4 amir 0 4 4

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  • Partitioning mySQL tables that has foreign keys?

    - by Industrial
    Hi! What would be an appropriate way to do this, since mySQL obviously doesnt enjoy this. To leave either partitioning or the foreign keys out from the database design would not seem like a good idea to me. I'll guess that there is a workaround for this? Update 03/24: http://opendba.blogspot.com/2008/10/mysql-partitioned-tables-with-trigger.html http://stackoverflow.com/questions/1537219/how-to-handle-foreign-key-while-partitioning Thanks!

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  • MySQL create memory leak in Tomcat

    - by mabuzer
    I have set a JDBCRealm for web-app inside tomcat, and when I reload it I got this from tomcat: SEVERE: A web application registered the JBDC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered. I use tomcat 6.0.24, with MySQL Connector 5.1.10,,,

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  • mysql select top users problem

    - by moustafa
    i have users table and i have posts table i want select from users the top users that have the big amount of posts from posts table and order them by numbers of posts i can make it by array_count_values() by i cant order it now i think if i make it by one mysql query by left and join will be more better table structure posts id | auther_id

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  • MySQL vs PostgreSQL for Web Applications

    - by cnu
    I am working on a web application using Python (Django) and would like to know whether MySQL or PostgreSQL would be better when deploying for production. In one podcast Joel said that he had some problems with MySQL and the data wasn't consistent. I would like to know whether someone had any such problems. Also when it comes to performance which can be easily tweaked?

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  • Glib-Error MYSQL????

    - by sam
    Hi guys, I got this Error when querying MYSQL Database: Glib-Error **: gmem.c:173:falied to allocate 216000000 bytes aborting.. Do anybody have some explanations? I am using MYSQL Query Browser. thanks

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  • SQL Server 2008 and MySQL Daily Backups

    - by Tyler
    Is there a quick and easy way to backup both SQL Server 2008 and MySQL, all their databases? Right now I have a batch script that runs, but I have to manually add a database each and every time, and I'm sick of maintaining it. So I want to set it up to backup all SQL Server and then all MySQL, I dont care if its two different solutions, just want the ability to backup all the databases without having to type them in. Thank you.

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  • MySQL UPDATE problem

    - by comma
    I know the following MySQL code is not correct can some help me fix this code to use both tables I'm trying to grab the id from learned_skills and skill_id from users_skills for AND skill_id = id Here is the MySQL code. SELECT learned_skills.*, users_skills.* UPDATE learned_skills SET skill = '$skill', experience = '$experience', years = '$years' WHERE user_id = '$user_id' AND skill_id = id

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