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

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MySQL - include a default value in LOAD XML INFILE statement

I have the follwing table: CREATE TABLE `tab1` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `DEFAULT` VARCHAR(25) DEFAULT NULL, `ITEM` varchar(25) DEFAULT NULL, `TIMESTAMP` TIMESTAMP ...
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MySQL/Percona Audit Log Plugin Not Working

I've been looking to implemement the Percona Audit Log plugin. So far I have installed it and configured it, and it seems to be working ok. Except, I have installed it on a slave Database as I don't ...
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1answer
12 views

Fulltext Search Doesn't Match a Hashtag

We maintain a table that looks like this to perform search queries on our forums database. I'll draw your attention to the FULLTEXT columns: CREATE TABLE `forums_posts_search` ( `post_id` ...
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18 views

Update queries randomly slow on INNODB Mysql

I have been struggling with a slow update query. Have already tried using indexes and other query optimization techniques. I have been using MYSQL database with INNODB engine. The issue is that, ...
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1answer
50 views

Stuck in “query end” status every 5 minutes

I'm sick of seeing data in the slow query log, so I decided to check out what the fuss was all about. An UPDATE query that is running up to tens of times per second is sometimes really slow. Here is ...
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2answers
118 views

MySQL: Show list of tables with paging in Terminal

I am using MySQL Ver 14.14 Distrib 5.5.44 for debian-linux-gnu. How can I show my tables page wise in a terminal?
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1answer
23 views

MySQL Trigger On UPDATE “Unknown Column” Error

I want to log a table when its updating a row which is column "insertDate" or "updateDate" value is before than 3 month. I wrote this trigger: DELIMITER /// CREATE TRIGGER ...
2
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1answer
58 views

Why does coalescing make this query quicker?

I have the following query SELECT SQL_NO_CACHE `table1`.* FROM `table1` LEFT JOIN `table2` ON table2.id = table1.table2_id WHERE (`table2`.`date_assigned` >= '2015-06-21') AND ( ...
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16 views

Exception when trying to connect to remove MySQL from Intellij IDEA

I can't connect from Jetbrains IDA to my MySQL at AWS. I am getting exception: Connection to MySQL - aws failed java.sql.SQLException: Communications link failure The last packet sent successfully ...
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5 views

Changing Default Values of Percona Audit Log

Have I missed Something here? I am installing the Percona Audit Log Plugin (MySQL 5.5). I can install it fine using: INSTALL PLUGIN audit_log SONAME 'audit_log.so'; I can then see all the default ...
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1answer
48 views

Mysql error “#1030 - Got error -1 from storage engine” when doing insert/update queries

I am starting to learn manipulating some long list of data from datalogs in mysql, around 300k entries, and it is being added by about 1k off entries everyday, it was working fine in a week then ...
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1answer
39 views

Diffrences between master and slave replication in mysql?

In a database named asterisk, there is a table named cdr which was partitioned on the time field. mysql> show create table cdr; Create Table: CREATE TABLE `cdr` ( `gid` bigint(20) NOT NULL ...
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1answer
28 views

Any risks in updating the system time on a mysql 5.5 server?

We just discovered one of our mysql systems has not been running ntp, with the result that the time has drifted a bit. If I enable ntp, and synchronize the time while the system is running are ...
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1answer
19 views

enable log_bin_use_v1_row_events in mysql 5.6

I have a MYSQL master with two slaves also running MYSQL 5.6. I want to create another slave and that needs to be MYSQL 5.5. I was wondering if replication will work smoothly. I have ...
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1answer
10 views

Percona / MySQL audit log plugin - limiting the content?

I've been looking to experiment with Perconas Audit Plugin, as it sounds like it could be potentially very useful. However it appears that it is a very blunt (ALL or NOTHING) tool. From my ...
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2answers
73 views

How can I display a mysql bit(64) column as a string of ones and zeros?

We have a MySQL 5.5 database with a table that holds a number of 64-bit values which are used for calculating the hamming distance. The columns for these are defined as BIT(64) and are populated ...
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2answers
40 views

How to run update query without interrupt other processes

I want to update a table and what I want to do is when other processes want to use this table, It will pause my update query and when other processes complete, it will continue to update.Is there any ...
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1answer
40 views

Copying MySQL schema, some tables not getting recognized!

From the 'data' folder of my colleague I copied the entire 'MyDatabase' folder and pasted that in my own 'data' folder.Now, some tables are getting recognized while others are not.**All the tables are ...
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1answer
23 views

What could cause a record to appear in the MySQL binary log but not the original table?

I have a web application (CiviCRM) that has the option to enable binary logging, which I've done. We use this software to record donations, including automatic recurring donations. Our payment ...
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1answer
33 views

Set sql_mode “blank” after upgrading to MySQL 5.6

After upgrading MySQL from 5.5 to 5.6, some our app face to problem and need set sql_mode to blank to solve this issue. I added sql_mode = '' to my.cnf but there was no effect on the mysql setting. ...
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1answer
49 views

MySQL SELECT blocking an INSERT?

Is it possible for a SELECT query to block INSERT / ALTER queries? I have the following (taken from ENGINE INNODB STATUS) on my slave database: ---TRANSACTION 26DA7060, not started mysql tables in ...
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26 views

MySQL - Seconds shown for query run time is incorrect

I came into work this morning, and first thing I noticed is that one of my Slave databases was running behind. I took a look at the processlist and could see that I had the following running. SELECT ...
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15 views

Trigger for different database host and remote server in MYSQL

I have two database server running on different host(Old host server,new host server). I want to create trigger i.e. If I insert any new record in new host server's table then that record is also ...
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1answer
45 views

Speed up COUNT(*) when using an index

I have a table similar to this (simplified): CREATE TABLE books ( id INT AUTO_INCREMENT, category INT NOT NULL, PRIMARY KEY (id), KEY (category) ); This table has over 10,000,000 ...
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1answer
13 views

mysqlbinlog: unknown variable ssl_key or ssl_cert or ssl_ca

I am trying to recover binlog from a remote server using mysqlbinlog client program, however it appears that mysqlbinlog doesn't recognize the SSL options that's required to establish SSL connect to ...
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1answer
53 views

Tuning MySQL query from explain

I am working on a search query in MySQL. I am getting this from explain: Original screenshot These are my indexes: Table definition: Original screenshot Query: SELECT `t`.`id` AS ...
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20 views

Issues in enabling binary logging

I am using MySQL 5.5 RHEL 6 I have made these changes in my.cnf file. [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql # Disabling symbolic-links is recommended to prevent ...
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2answers
20 views

Config file location in MySQL

I have MySQL 5.5 running in RHEL. I have checked for my.cnf file in my filesystem and its available in two destinations. One in the user's home directory and the other is in /data/etc_ORIG directory. ...
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1answer
46 views

Use of log_bin_trust_function_creators in MySQL

What is the use of log_bin_trust_function_creators? Also, Is the value of the parameter dynamic? Will it change if I restart my MySQL service?
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1answer
13 views

MySQL - using result of Procedure in Trigger to Insert in new table

I'm guessing I'm doing something that's prohibited by MySQL, but can't see what. Basically, I have a set of tables that hold lists of things (item name, item types, item groups etc.), and I need to ...
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44 views

MariaDB error on alter table - table removed - constraint name is blocked

Today, we experienced a strange behavior in 5.5.41-MariaDB (InnoDB): An ALTER TABLE (add constraint) statement failed with error (mysql server has gone away after that). Then the database table ...
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2answers
57 views

mysqldump error on common_schema

I tried to take the backup of common_schema in Server version: 5.5.44 MySQL Community Server (GPL). mysqldump -u root -p common_schema > common_schema_bkup.sql I got the following error: ...
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1answer
16 views

MySQL - Enabling Scheduled Event on Master and Slave Simultaneously

This may seem a bit strange, but I am trying to get a Scheduled Event to execute on both Master and Slave. I have two databases set up in a Master (A) to Master (B) replication environment. Master A ...
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2answers
102 views

View with parameter IN

I'm creating a view in which I have a where with an in clause and I want it to be a parameter. Unfortunately views can't be created with parameters, so I tried replacing it with functions, but ...
0
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1answer
17 views

MySql DB from Ubuntu to RHEL

I would like to migrate my Mysql databases from Ubuntu to RHEL..what is the best way to proceed? I'm on community edition. I will be moving to entreprise edition of MySql on RHEL.
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1answer
33 views

Windows crashes on doing sql dump [closed]

Windows simply crashes and opens the blue screen for dumping physical memory on trying to import sql dump. Blue screen error: IRQL_NOT_LESS_OR_EQUAL So far I have tried 4 methods: Through workbench ...
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1answer
43 views

Migrating mysql.user table from MySQL 5.5 to MySQL 5.6

I have a tricky question. I am migrating from MySQL 5.5 to MySQL 5.6. I want to migrate 45 users in MySQL 5.5 to MySQL 5.6 Questions Should I just take a dump of the MySQL 5.5 user table and ...
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2answers
67 views

Should I stop an awfully inefficient MySQL DELETE statement?

I'm running the following statement on MySQL 5.5 in a 1GB 1CPU SSD virtual machine from Linode: DELETE table FROM ( SELECT MAX(id) id, field FROM table GROUP BY field ) temp_table INNER ...
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1answer
34 views

Mysql can't start?

Mysql can't start, here is the log : 150708 06:28:36 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 150708 6:28:36 [Warning] Using unique option prefix key_buffer instead of ...
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8 views

Binlogs in MySQL are created too frequently, how to solve this issue?

We are using MYISAM storage engine in a Master-Master replication environment. The number of binlogs which is to be generated regularly is getting very high count despite setting binlog size of 1.6GB, ...
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1answer
43 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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1answer
36 views

How to Upgrade Master Slave MySQL on AWS RDS?

I already have Master Slave configuration on AWS RDS. We want to upgrade 5.5 to 5.6.23. ..What should be correct sequence to Upgrade ? 1. Upgrade Master ( Using Modify Instance ) --> Upgrade Slave 2. ...
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1answer
219 views

Percona mysqld got signal 11

I've googled and searched stackexchange, but can't find anything relevant to this particular issue (there are other error 11 issues, just not for this as far as I can tell). We have a server that is ...
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3answers
55 views

How to show multiple names for one record but not duplicate the record?

I have a database structure like so: Car - id - carname - image - category - status Parts - partid - partname CarParts - carpartid - carid(fk) - partid(fk) - amountid(fk) Category - ...
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1answer
43 views

MySQL Read/Write Benchmark

I'm trying to benchmark Read/Write speed in MySQL 5.5. Currently I have a stored procedure that insert rows with random numbers to a table and I'm measuring time of execution before and after ...
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2answers
80 views

mysql master slave replication scenario

We are creating a new mysql slave, but for dump we are taking from a backup server which is a slave of current master. Now to enable replication we want to connect it with the master so should I take ...
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1answer
68 views

what could cause a mysql process to close (clean)

We are using mysql master-master (version 5.5.32) for an API manager called Layer7. The 2 hosts holding the instances are in the same ESX From time to time we have mysql doing a clean shutdown for ...
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2answers
51 views

Killing a process without login to MySQL

Here is the situation: I was running a very complex query on a database which was expected to execute within a few hours over night(server configuration is not good and data set is large). This ...
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31 views

Delete using join or using sub-query?

I need to delete rows from a table based on what is present in a temporary table. For me, both of these statements work : DELETE from main_table where `id` in (select `deletable_id` from ...
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1answer
29 views

MySQL: Incorrect binary log format - OFF.000

I have a Percona MySQL 5.5.30 as a master(Debian 6.0.7). I got a weird issue that all my binary logs started saving in format OFF.00* instead of the specified format in .cnf file. mysql> show ...