Tagged Questions

2
votes
1answer
60 views

Problem in Fetching Result set in Desired Format

I have 2 tables having the following columns Person ------ person_id, first_name, middle_name, last_name Items ----- person_item_id, person_id, item_type, status, ordered_date The query is ...
0
votes
0answers
46 views

Mysql query is very slow

I am developing a website like any other social networking site using mysql. I wish it give people suggestion to my users, and I have implemented this functionality in my application, but It is ...
1
vote
1answer
82 views

Is it okay to have different lower_case_table_names value on master and slave?

I have a OSX MySQL master with lower_case_table_names set to 2. I have just setup a Linux MySQL slave with lower_case_table_names=1. I haven't started replication on the slave, but everything looks ...
0
votes
0answers
48 views

Returning multiple resultset from the same table

i am working with mysql procedure. final result set i have got in to one table. now i need to return for each set i need to return the value. example: like this is contents in my the table. i need ...
1
vote
2answers
58 views

Should master and slave have same mysql version?

I have a master database running mysql 5.5.11, and I am planning to setup a new slave. I am planning to use the 5.5.30 as it is the latest version. For setting up new slave, I am copying files from ...
0
votes
0answers
110 views

how to improve performance of my query it was taking more than one hour in my environment

How can I improve performance of below query? It was running more than one hour to execute in my production environment. Query plan: mysql> explain SELECT transaction_detail.trans_id, ...
0
votes
1answer
67 views

How to removing or reduce the size of redo logs in MySQL cluster

Can anybody tell me that how can we reduce the redo log file size or can we remove the redo log file size in MySQL Cluster and also what will be the impact of it on performance of cluster.Also can we ...
1
vote
1answer
385 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: ...
2
votes
3answers
454 views

MySQL optimization - year column grouping - using temporary table, filesort

I have a transactions table which is having 600,000 records, I need to list the count for the dashboard on financial year basis. The table used is MyISAM. I tried adding index for the transaction date ...
0
votes
1answer
316 views

How can I enable my-huge file on windows server?

I installed Windows Server 2008 and MySQL 5.5. Now I need configure MySQL for huge InnoDB tables and a lot of connections. I see that on my Windows Server, there is a my-huge file(configs files that ...
1
vote
1answer
158 views

Mysql 5.0 on Windows 2008

I have a problem with MySQL on Windows Server 2008 x64. This is the first time I've installed MySQL 5.5 with performance problems. I decided to go back to the older version that worked well with ...
1
vote
1answer
209 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 ...
4
votes
1answer
813 views

Setting up MySQL Cluster on Two Systems

I am attempting to setup a MySQL Cluster. I have the folllowing setup one management node two data nodes another machine on which two more nodes reside Below is the config.ini file: [ndbd ...
2
votes
2answers
144 views

MySQL - How much physical space will be reduced by changing the column type?

Lets say I have the following table: CREATE TABLE `my_table` ( `id` int(11) NOT NULL AUTO_INCREMENT, `user_id` int(11) NOT NULL, `relationship_status` varchar(48) CHARACTER SET utf8 COLLATE ...
2
votes
2answers
87 views

How to see what was executed in the database via binlogs for specific date?

I am trying figure out how to "query" binlogs to see what was exectued in the database for a specific date. For example, if I execute mysqlbinlog binlog then the thing just runs forever and it is had ...
3
votes
1answer
1k views

Deleting bin logs in replication environment

I have a question about deleting binary logs in the replication environment: We have an environment with 1 master and 2 slaves (running mysql 5.5). Sometimes, we run into a space issues during heavy ...
5
votes
3answers
1k views

Maximum table size for MySQL database server running on Windows (NTFS) Table type InnoDB

I need to design database to store information contained in millions of log files generated by devices on trial on network. I have designed 5 different tables to store log file information. But, as ...
1
vote
1answer
273 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
142 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 ...
2
votes
2answers
578 views

Can we assign mysql Key_buffer_size value for particular table?

In some documents I found that we can assign key_buffer_size to myisam table. This also includes the following steps: SET GLOBAL myisam_table.key_buffer_size = 4194304; CACHE INDEX test.myisam_table ...
0
votes
0answers
186 views

Mysql 5.5 hangs from time to time with ubuntu 12.04

I am using Mysql 5.5 from ubuntu 12.04 64 Bits with both MyIsam and Innodb engines : From time to time, when I do some 'big' requests like dropping a database, altering a table, adding an index on a ...
2
votes
1answer
2k views

How to grant access for multiple tables to a user in MySQL DB?

I have mysql db named "greats" with four tables as below +---------------------+ | Tables_in_greatstat | +---------------------+ | log | | sitedet1 | | siteindex ...
1
vote
3answers
172 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 ...
3
votes
1answer
424 views

Keeping MySQL staging database on same server updated from production

I just migrated my MySQL 5.5.20 to Amazon RDS from MySQL on EC2. The one thing I'm having difficulty with is how to keep my staging database updated from production. Before, I just ran a nightly ...
3
votes
2answers
701 views

MySQL replication to slave having VPN connection to Master

I am setting up an environment in which the Master and Slave are on different networks at different physical locations (both run on MySQL 5.5.20). I have set up a VPN connection from slave's network ...
4
votes
1answer
346 views

will replication from 5.5.20 to 5.0.XX server work?

I gave two machines which run on two entire different versions of MySQL server. I want to do the replication from 5.5.20 to 5.0 server. Will that be possible? Because I remember when I transferred ...
1
vote
1answer
59 views

How we can enable index_condition_pushdown in MySQL..?

I have optimizer_switch variable as mysql> show variables like 'optimizer_switch'; +------------------+-------------------------------------------------------------------------------------------+ ...
1
vote
3answers
1k views

MySQL: Trying to update to 5.5

I've followed this instructions, but after mysqld --skip-grant-tables --user=mysql, I'm getting this: 110913 20:29:18 [Warning] Can't create test file /var/lib/mysql/my-laptop.lower-test 110913 ...