MySQL 5.6 : Latest Release of MySQL with improvements that enhance every functional area of the database kernel.

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In place upgrade from MySQL 5.5 to 5.6.11 removes all users from user table

On Windows, I upgraded from 5.1 to 5.5 no problem. Copied my 5.1 data folder into my 5.5 instance Started mysqld skipping grants Ran mysql_upgrade All good, but going from 5.5 to 5.6: Copied ...
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298 views

How to drop all scheduler events in MySQL 5.6?

In MySQL 5.6 is there a way to drop all scheduler events with an administrative command or do I have to go through them one by one with DROP EVENT [IF EXISTS] event_name?
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Cannot open table mysql/innodb_index_stats

After a fresh install of XAMPP and import from my linux live db that is working to the windows Dev-stage, I started encountering problems with INSERT. Everything else seems to work well. The errors I ...
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3answers
322 views

Amazon RDS - and binary log rotation

New to RDS (used to having my own server in my own data center). We are on MySQL 5.6 on RDS. when a slave gets behind in replication lag, the master ceases to rotate out its binary logs. It is, ...
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1answer
40 views

optimize the query with big and low cardinality

I have big enough dataset and few joins to get them all with help next query: SELECT DISTINCT c.c_id FROM c_active z1 INNER JOIN cs c ON (z1.cv_id=c.cv_id) INNER JOIN indi i ON (c.m_id=i.m_id) INNER ...
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1answer
29 views

MySQL 5.6.17 running out of memory when opening table with many partitions

We are currently setting up a MySQL database (version 5.6.17) on an Amazon db.m1.large RDS instance for storing time series data. Each time series property of an object is stored in a separate InnoDB ...
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2answers
59 views

Converting MySQL 5.6.10 - 32 bit to 64 bit version

I am currently using MySQL DB Version 5.6.10 for 32 bit running in 64 bit Window OS.I want to change it to 64 bit without taking any dump..Can anyone help in this?
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22 views

How to restore data after MySQL Upgrade?

I upgraded from MySQL 5.5 to 5.6 by uninstalling 5.5 and then installing MySQL 5.6. Now that MySQL 5.6 is running, none of my DBs or data is present/visible in MySQL Workbench. I also see that I ...
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1answer
28 views

Change column without interrupting service

We need to change the data type of a column in a large table (~1.7 GiB) from VARCHAR(1024) to VARCHAR(512) in order to be able to create a secondary index over two columns. We're using MySQL 5.6 with ...
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1answer
26 views

MySQL InnoDB table accepts Non-Existent Foreign Key

Using EasyPHP 14.1 VC11 and phpMyAdmin (4.1.4) to create a website project in my home computer. The MySQL version is 5.6.15 according to the EasyPHP administration page. Working on Windows 7 64-bit. ...
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2answers
2k views

How to force higher values of open_files_limit or table_open_cache?

I'm having a frustrating problem where setting my.cnf to values higher than I currently have them does not 'take'. This is MySQL 5.6.14 on MacOS X 10.8.3 I'm trying to address dropped connections ...
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37 views

Why Percona MySQL is crashing again and again

We have Percona MySQL Cluster running with three nodes on CentOS. Server : Percona-XtraDB-Cluster-server-56-5.6.19-25.6.824.el6.x86_64 One node is crashing repeatedly. Thread pointer: 0x18910ba30 ...
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1answer
38 views

MySQL: How index speed up query execution

I have read multiple articles about MySQL indexes. Some of the important pages are below: http://dev.mysql.com/doc/refman/5.6/en/mysql-indexes.html ...
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1answer
72 views

What is default MySQL binlog retention in AWS RDS?

I tried to retrieve my MySQL RDS binlogs in order to run manual "rollback" for some SQLs. Unfortunately, I noticed that only 2 binlogs for the last 30 minutes are available. "call ...
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1answer
27 views

MySQL 5.6 “temporal columns” upgrade - datetime etc.

I upgraded from MySQL 5.1 to 5.6.17. Now in Wordpress plugins some of my timestamp columns have started behaving strangely. MySQL documentation on this very critical feature enhancement (decimals in ...
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1answer
19 views

Mysql closing immediately after new installation

I am using mysql as an backend for my webapp ,the software ran without any glitch but today it gave unexpectedly ERROR:2003 i tried many solution on the internet but none worked. so reinstalled the ...
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0answers
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mysql 5.6 GTID replication 'Got fatal error 1236 from master when reading data from binary log'

I Checked SHOW SLAVE STATUS error is "'Got fatal error 1236 from master when reading data from binary log: ''The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master ...
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2answers
102 views

mysqldump --single-transaction, yet update queries are waiting for the backup

If I use mysqldump --single-transaction, according to the docs it should do flush tables with read lock to get a consistent state and then start a transaction and no writers should be waiting. ...
2
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1answer
62 views

InnoDB: “Only one log file found” after binary import

My first one on DBA... After successful upgrading a master MySQL server 5.5 to 5.6.17 (CentOS 6 VPS serer), I done and moved my binary backups to a slave server (same version 5.6.17 but different ...
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1answer
29 views

Loading the databases from previous installation mysql

My Windows OS crashed today. Now I have recovered all the files in Program files/MySQL folder.(I don't have the exported .sql file) With the new installation of MySQL 5.6(same as before), can I get ...
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1answer
43 views

MySQL crashes frequently on a Windows server

I have been facing an issue with MySQL crashes since last week. I don't know what exactly is happening. When I look at the Windows logs, I see the following error message: Faulting application name: ...
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1answer
17 views

Where mysql writes its log seqeunce numbers and last checkpoint at?

I'm working on developing mysql log collecting system. To do that, I have to collect log sequence numbers from mysql LSN and last checkpoint location. But I have no idea where should Which log file ...
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28 views

Why does Amazon RDS memory utilization drop and disk space utilization rises?

I encountered a problem with my Amazon RDS(db.m2.2xlarge) where DB connections spiked up and my website started responding slowly. On looking up the metrics I was not sure why my freeable memory shot ...
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1answer
37 views

add column without metadata lock in mysql 5.6

I am using MySQL Server version: 5.6.15 Homebrew. I need to add new null column. alter table requires no metadata lock. In order to avoid this MySQL 5.6 introduced algorithm=inplace. Here is the ...
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1answer
44 views

Is it possible to uninsall MySQL-5.6 and install MySQL-5.1 on RHEL 5

I have installed MySQL-5.6.x community edition on RHEL5. It was running fine. Since, it is my testing server. To find the differences in execution timing, I have to install the MySQL-5.1 community ...
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3answers
173 views

Why query_cache_type is disabled by default start from MySQL 5.6?

We've upgraded to MySQL 5.6 and start seeing the loading of db server increased significantly, and finally found out the query_cache_type is defaulted to off start from 5.6. We enabled it again and ...
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1answer
60 views

How performance schema in mysql 5.6 improve performance?

Since MySQL 5.5 performance_schema database has been added likewise information_schema. As we know that tables in information_schema contains statistical information like tables, plugins, partitions, ...
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2answers
66 views

Seg faults in Percona Server 5.6.19

Trying to figure out what went wrong here. Any advice would be appreciated. This server is running a new installation of Percona Server 5.6.19 on CentOS 6.5 16:05:46 UTC - mysqld got signal 11 ; This ...
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0answers
32 views

Unable to install mysql 5.6.17and configure mysql on Win 7 -64 bit Os

Already seen this post but not my type of question as iam stuck in the installation itself I am trying to install MySQL 5.6.17 on Windows 7 64-bit Operating System. Everytime I try I am stuck in ...
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1answer
40 views

Optimizing large table in mysql

I'm running mysql 5.6 and I am trying to optimize a large table without mysql recreating it. As a dry run I ran the same command (optimize table) on a smaller table in the same DB and mysql insists on ...
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1answer
103 views

How to upgrade MySQL (5.5) production DB to 5.6 with minimal downtime

Our existing Database size around 200GB. We want to use consistent, parallel backups methods. For testing, I migrated my Development DB from 5.5 to 5.6 by running mysqldump with option ...
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66 views

MySQL: Moving Database from Windows to Linux

I have a Windows based dedicated server have below configuration: Windows edition: Windows Server 2008 R2 Standard Service Pack 1 Processor: Intel(R) Xeon(R) CPU X5460 @3.16GHZ 3.16 GHZ (2 ...
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1answer
23 views

What is the difference between Com_xxx and handler_xxx?

Initially my com_delete variable and handler_xxx variables are nil. | Com_delete | 0 |+ | Handler_delete | 0 | +----------------+-------+ then I issued a delete query delete from gt ...
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1answer
40 views

Why didn't MySQL keep the innodb_file_format after loading a mysqldump

I was loading a mysql dump today when I ran into ERROR 1118 (42000) at line 279: Row size too large (> 8126) Which I thought was weird because I know I had turned on row compression and was ...
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2answers
367 views

mysql no longer defaulting to /tmp/mysql.sock

I was testing some software to see if it could connect to mysql correctly when mysql is not using /tmp/mysql.sock. I stopped mysql, editted /etc/my.cnf to add socket=/var/lib/mysql/mysql.sock ...
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1answer
44 views

How does the alter command work internally when adding a column?

Can anyone explain what the internal operations are that takes place when an alter command is issued? How is column modified? Does it use created_tmp_tables or created_tmp_files? As per my test, I ...
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1answer
129 views

Can anyone offer an opinion on handlersocket vs memcached performance in MySQL 5.6

I must say I was a little mis(un)-informed about the MySQL Memcached plugin which offers the same NoSQL like access to InnoDB tables as HandlerSocket, I had only had experience with entirely ...
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1answer
34 views

How to include a semicolon (“;”) in a MySQL pager command

I've just discovered the pager command in the MySQL command-line client, and I'm having a tonne of fun. This blog post is great: ...
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38 views

Not getting satisfactory performance improvement with NDB Cluster

Since last few days, I am trying to improve performance of MySQL NDB Cluster but can't figure out what I am missing/being mistaken in defining/tuning parameters. I have these configurations running ...
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2answers
97 views

MySQL 5.5 to 5.6 Upgrade. Will data remain the same?

We are considering to upgrade to MySQL 5.6 this summer. I would like to know if our data will be changed in any way once we perform the upgrade? I've been reading and I found that mysql_upgrade ...
0
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1answer
22 views

MySQL still seems to be establishing a connection even when access is denied, causing aborted connects and instability

Lately the server's been going a bit haywire and we've spent several weeks chasing down leads to no avail. All we can tell is that when the websites go down (and come back up, and go down, and come ...
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2answers
323 views

MySQL5.6 on Mac OS X 10.6.8 problems when granting permissions to root

I'm having serious problems with a MySQL 5.6 instance on a Mac Server. We had to upgrade MySQL to a newer version, but it turned to be a bad idea, as we lost control to it. We had a backup of the ...
2
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2answers
414 views

Can I move the undo log outside of ibdata1 in MySQL 5.6 on an existing server?

I've been growing concerned about the large size of ibdata1 that can never shrink even when using file-per-table on innodb Moving the undo log files outside seemed logical but this procedure seems ...
3
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1answer
240 views

Slower queries after upgrade from mysql-5.5 to mysql-5.6

There is lots written about how MySql 5.6 is faster than MySql 5.5 (e.g. http://dev.mysql.com/tech-resources/articles/mysql-5.6.html) but we upgraded our Amazon RDS instance (using the new upgrade ...
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Can queries containing deterministic user defined functions be cached in mysql query cache?

According to the mysql 5.6 docs: A query also is not cached under these conditions: ... It refers to user-defined functions (UDFs) or stored functions. However, I have seen claims that if ...
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How to set up MySQL 5.6 Master- Slave Replication step by step

I am new to Mysql replication. I want to have 2 MySQL servers, a Master and a Slave, running on two Ubuntu 14.04 Computers. Their IP addresses will be 10.0.0.1 (Master) and 1.0.0.02 (Slave). I need to ...
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2answers
90 views

SQL Question: Selecting different language versions based on availability

I have the following situation: I have a table that contains entries with language versions (German and English) as part of the key (the other part being a "name" field). However, not always both ...
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1answer
61 views

Find the last SQL statement executed for a given connection

MySQL running on Windows 7 64 bit. I'm trying to track down a leak of connections, I'm pretty sure the only ASP.NET app using the server is at fault here. We received the "Too many connections" ...
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0answers
83 views

MySQL Replication thread hangs on flush tables with read lock

I have a MySQL master/slave set up with row-based replication. At times of higher load we've been seeing replication halt and all slave thread activity commands just hang. STOP SLAVE, SHOW SLAVE ...
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1answer
141 views

Getting an error in MySQL Workbench: Cannot Open Administrator

I'm using local installation of MySQL CE on Windows 7 64-bit. Tried to use Administrator part for the first time. Here's the error I'm getting: I also see the following in the log: <object ...