MySQL 5.5 brought many performance enhancements and expanded the feature set of the popular open-source RDBMS.

learn more… | top users | synonyms

1
vote
2answers
1k views

Need suggestions for best way to archive MySQL (InnoDB) tables

Problem: I have two fairly large tables. A 'wall' table for messages between users with 9 million rows at 2 GB and a 'chapter' table at 2 million rows and 18 GB. I want to keep the number of active ...
1
vote
1answer
111 views

slave issue with load data

When I use "load data infile" on master, the data is properly transferred to slave. But when I use "load data local infile" from remote server to master, the data does not pass on to slave. Why does ...
1
vote
1answer
108 views

How to Archive Only MySQL Master not the Slave.?

Currently I have a Master and Slave. Both of them have same set of data(Can Say are in Sync).The Replication is running fine. What i need to accomplish is that... Need to Archive the Master(Say I ...
1
vote
1answer
1k views

MySQL Workbench ERROR 1064

I have a problem with my database. I have created the model and now I want to sync it with my database on my WAMP Server (local) but it keeps giving me an error. I searched for the cause of the ...
1
vote
1answer
401 views

InnoDB - How to get top locked tables and rows which are locked

I was searching for a tool OR query which can give me top locked tables and which particular row is locked, Is it possible to get ?
1
vote
1answer
214 views

Referring to super parent or as a separate entity?

I have this person table as super parent, id firstname lastname email telephone ... ... and user table as a child id person_id (FK) password username screenname ... ... They must be 1:1 ...
1
vote
1answer
358 views

Does replication with SSL encryption work on MySQL 5.5?

I am trying to set up replication with slave on Amazon EC2 and master in our local environment. The setup went fine without SSL encryption. But when I set up the replication to be SSL encrypted, it is ...
1
vote
3answers
692 views

“Too many connections” when running MySQLDump

MySQL 5.5.x on Windows, 4GB RAM. I have a Wordpress Multi-Site install. The WPMU db contains over 6k tables (I know, horrendous... WPMU is not my favorite app right now) I am running mysqldump ...
1
vote
1answer
216 views

mysql event running at wrong time

I created an event to run every 24 hours and be run at 14h. Its selects some data from tabels and writes it as to a file (csv format) The query and writing to file goes ok. The event is triggered. ...
1
vote
1answer
811 views

I am getting an error while trying to download binary for mysql 5.5.11

I am trying to upgrade MySQL 5.1 to 5.5.11 on Ubuntu 10.10. Everytime I try the wget command I get this error: wget ...
1
vote
1answer
3k views

Is there a PPA for MySQL 5.5 for ubuntu 10.10 and 11.10?

I want to install MySQL server 5.5 on ubuntu 10.10 and 11.10 servers but have not yet found a problem free PPA or installation method as of yet. Has anyone managed to do this with the said versions of ...
1
vote
1answer
171 views

Appropriate Windows version for Mysql

I have a HP ProLiant DL380 G5 server and I would like to install mysql on it . My questions are: Which MySQL version should I install from this link for better performance, 32 bit or 64 bit? Which ...
1
vote
2answers
916 views

Why a copy of my.ini of other MySQL installation not working on my PC

I have two MySQL installations on two different PCs not connected to each other. I made some changes in the my.ini file of PC 1 and tried using this file on PC 2, but MySQL service fails to start. Why ...
1
vote
2answers
31 views

Is there a rule of thumb regarding the size and number of a buffer pool instances?

I know the consensus seems to be approximately 75% of ram should be dedicated to the buffer pool. But, I'm more interested in the optimal number of buffer pool instances. What are some things to ...
1
vote
0answers
17 views

Mysqldump --flush-logs results in small backup files?

New to MySQL and just learning how to setup a daily full backup (binary logs enabled). My goal is to run a daily full backup of the databases/schemas and reset the binary log. I'm currently using an ...
1
vote
0answers
27 views

MySQL query with order by decreased performance

Here is my schema: CREATE TABLE `UserMst` ( `UserID` mediumint(8) unsigned NOT NULL AUTO_INCREMENT, `EMailID` varchar(50) DEFAULT NULL, `UserName` varchar(20) DEFAULT NULL, `FullName` ...
1
vote
0answers
19 views

crossplatform mysql_install_db script in mysql 5.5.34 on Windows

I downloaded mysql-5.5.34-win32.zip and found out there is mysql_install_db.pl script. However mysql 5.5 documentation says: mysql_install_db is a shell script and is available only on Unix ...
1
vote
0answers
40 views

Upgrading from MySQL 5.5 to 5.6 - timestamp issue?

I'm looking at upgrading my Percona Server setup from 5.5 to 5.6. Reading the upgrade docs from MySQL sounds mostly straightforward except for anything involving time/date columns. As far as I can ...
1
vote
1answer
105 views

How to create trigger to update timestamp when record is updated or inserted in another table

I have a table t_task and a table t_taskaction with a foreign key to t_task. I would like to update timestamp from t_task that is refering the foreign key form t_taskaction with every update in ...
1
vote
2answers
66 views

What happens when we take a timediff between timestamp and datetime

Say I have following table in mysql (5.5+): CREATE TABLE IF NOT EXISTS `test` ( `id` int(11) NOT NULL, `x_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, ...
1
vote
1answer
319 views

Query State hangs on sending data

For some reason, the query state hangs on "Sending Data" (using show processlist;) and I have no idea why. This is the table creating script: CREATE TABLE IF NOT EXISTS `esp_game` ( `gameID` ...
1
vote
1answer
46 views

addition in datetime column during insertion in mysql

i have a table with below 5 columns..timestamp is data type for timedate related column : Region event_time start_time mid_time end_time India 2013-11-03 13:00:00 America ...
1
vote
0answers
236 views

Fastest way to perform simple operations on 1 million rows

I have a simple table with more than 1 million rows in an InnoDB MySQL table. Here are the steps that I need to perform on each row: SELECT * FROM tbl where work_done=0 make some data processings ...
1
vote
1answer
82 views

Upgrading MySQL 5.1 to 5.5 - All tables gone [closed]

I'm trying to upgrade from MySQL 5.1 to MySQL 5.5. I followed the instructions here: http://dev.mysql.com/doc/refman/5.5/en/windows-upgrading.html I also adjusted the Datadir. But after the upgrade, ...
1
vote
0answers
27 views

table scheme definiation it this way that insert duplicate into another table

I have a table in which there is a column name with SP varchar(10) NOT NULL. I want that column always to be unique so i created unique index on that column . My table schema as follows : CREATE ...
1
vote
0answers
315 views

MySQL InnoDB slow inserts

I'm currently struggling with an MySQL Community Server 5.5.27 when inserting large numbers of rows into a table. We're running a 24 core Intel Xeon machine with an SSD software raid array. I did some ...
1
vote
0answers
20 views

How do I configure MySQL to store specific entire InnoDB tables on a different drive in Windows ( Server )?

After skimming the MySQL ( 5.5 ) docs on Partitioning, that seems to deal with breaking parts of the same table off onto other drives. I'm struggling to find information on how I pinpoint an ...
1
vote
0answers
345 views

SELECT + INSERT + Query Cache = MySQL lock up

MySQL server seems to constantly lock up and stop responding on certain types of queries and eventually (after couple of minutes of not responding) give up with an error "MySQL server has gone away", ...
1
vote
0answers
92 views

MySQL Replication - Used to work, now get error 2026

I've had replication running now for about 2 years, with 1 master and 2 slaves. Both are through an SSL connection. I'm using MySQL 5.5.15 on the master (CentOS), and MySQL 5.14.46 on the slaves (on a ...
1
vote
0answers
29 views

MySQL - Randomly long DESCRIBE queries

I have several queries like this (running on MySQL 5.5): DESCRIBE `TABLE`; And it randomly takes 5-10 seconds on my production servers. We have an ORM that caches this data once per day (per web ...
1
vote
0answers
114 views

innobackupex: What causes Slave_open_temp_tables did not become zero after waiting 15 minutes?

As you might know, in order to assure a consistent replication state, the slave should be backup only when there are no open temporary tables: ...
1
vote
3answers
1k views

How do I use subquery on the same table in MySQL?

I have a query like this which takes a really long time to run. The table is around 4 million rows. DELETE FROM TABLE WHERE value_was IS NULL OR value_was <= value_now; I'm hoping I could ...
1
vote
1answer
121 views

Repeated values in group_concat

I have two tables, first the table food and Second is Activity: INSERT INTO food (`id`, `foodName`) VALUES (1, 'food1'), (2, 'food2'), (3, 'food3'), (4, 'food4'), (5, ...
1
vote
1answer
195 views

MySQL users corrupt

I have a strange situation here: From time to time I cannot log in with any of my mysql users. I even cannot make a mysql dump. So I started searching in mysql files and I found that users.MYD and ...
1
vote
0answers
91 views

Error in alter table reorganize partition for MySQL Cluster

My cluster contains 48 million rows and cluster contains 4 storage nodes . After that I add online storage node and executed alter table 'customer_tbl' reorganize partition. Some parameters of ...
1
vote
0answers
602 views

“Lost connection to MySQL server during query” error

I have MySQL 5.5.20 and this table: mysql> desc country; +----------------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | ...
1
vote
2answers
4k views

MySQL Installation error: Unable to update security settings

I tried to configure MySQL server 5.5 on Windows and this is what I get mysql-server-5.5-winx64:56 - Attempting to update security settings. mysql-server-5.5-winx64:100 - Unable to update security ...
1
vote
0answers
40 views

Is there a canonical list of MySQL defaults which should be changed

I'm setting up a new mysql server as we're building a new app at work. Most of the developers/operations guys are familiar with mysql. Many of mysql's settings (eg strict mode) are set badly by ...
1
vote
1answer
521 views

MySQL Tables crashing randomly

This is one of the many random Tables that get corrupted. Any ideas why and what would be causing this? How do I keep MySQL tables from crashing and MySQL from crashing? Repairing USR_wp537 ...
1
vote
2answers
684 views

Mysql replication - Error No. 1146&1062

short version In master master replication, How to have one master write data with odd IDs and the other one with even IDs? Is it the way to avoid conflict? detailed version I wanted to setup a ...
1
vote
1answer
109 views

restricting users to rows they created

To educate myself in PHP and mysql, I am making a browser based rpg game. This game will allow any number of users to register an account and, once registered, they can add, edit or delete champions ...
1
vote
0answers
382 views

MySQL cluster stuck in start phase 4, how to proceed?

Over the weekend our cluster we set up for evaluation had one of its data nodes lose network connectivity briefly. This was while another data node was in the middle of a restart (which had been going ...
1
vote
0answers
90 views

How to create multi volume file backup using symantec backup.exec

I am using symantec backup .exec for backup and restore in mysql server . Now I am in need to take larger database backup in tape .But it exeeds the tape storage and I am trying to create a multi ...
1
vote
1answer
51 views

Query from database

I have a table named mip. The table has primary key id, a foreign key product_id and a column usage_type. product_id is a primary key id to a table named product. It is one to many relationship from ...
1
vote
0answers
75 views

How to profile individual queries using PERFORMANCE_SCHEMA

I've been looking at SHOW PROFILES, which seems ideal for what I am doing. However, I've noticed a warning that SHOW PROFILES is being deprecated and that PERFORMANCE_SCHEMA should be used instead. ...
1
vote
0answers
81 views

MySQL replication backup

How to take MySQL Master-Master and Master-Slave replication backup?. I have setup Master-Master replication with a separate slave for each master on Ubuntu. What happens if, I issue or schedule ...
1
vote
1answer
558 views

decreased performance of stored procedure when migrated from mysql server 5.0 to 5.5

i recently testing the move of our db from one server to another. as part of this process i copied all the data to the new db and started testing it. as a comparison i run a store procedure whose ...
1
vote
0answers
166 views

How to speed up this query

MySQL doesn't have nearest neighbor search so. So I try to come up with a "distance" that's reasonable so the number of returned query is around 20-200. That way innodb doesn't have to compute ...
1
vote
0answers
187 views

mysql server is not sending result set back after query execution to client and staying in sending data state

When I pass a query from my Java application to mysql server, it stays in Sending Data state and not returning result set back to application. When I execute the same query in SQLYog directly, it ...
1
vote
1answer
613 views

mysql error log issue

I have mysql server running successfully. The error log location is as.. mysql> show variables like '%log_erro%'; +---------------+------------------------+ | Variable_name | Value ...