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

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How can I make MySQL client read password from mylogin.cnf?

I'm trying to make the mysql client connect to a mysql server without requiring the password to be given interactively. Steps taken: 1) First create a mylogin.cnf file $ mysql_config_editor set ...
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2answers
3k 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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1answer
21 views

MySQL 5.6 Datetime Range

According to MySQL 5.6 doc, the supported range for datetime data type is '1000-01-01 00:00:00' to '9999-12-31 23:59:59'. But when I tried inserting values that are earlier than '1000-01-01 00:00:00', ...
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1answer
19 views

'DROP TABLE mysql.failover_console;' replicates to slaves, but 'Use mysql; DROP TABLE failover_console;' does not

I am currently looking to setup automatic failover for my MySQL 5.6.21 Master on CentOS 6.6. I have mysqlfailover set up in my lab, and it is working well enough. My question is not about that, but ...
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2answers
22 views

Aggregating sum day by day from multiple joins returns unexpected results

I'm trying to make a table where the task hours and group hours are aggregated day by day. I'm able to get the wanted result for both tasks and groups, but when I try to get them in the same query, I ...
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2answers
1k views

Unable to change engine to MyISAM in MySQL

I have installed MySQL 5.6.10 on Mac OS X 10.6.5. My issue is that MySQL is using InnoDB as its default engine. I have checked following engines are supported in MySQL: show engines\G ...
3
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3answers
577 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
42 views

ALTER TABLE blocking in MySQL 5.6

I have a question with a MySQL 5.6 master-slave setup. If I were to modify the master's schema with an ALTER TABLE SQL query, then when the slave tries to execute that ALTER TABLE statement too, would ...
1
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1answer
201 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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0answers
10 views

mysqldbcompare showing AUTO_INCREMENT differences but there are no missing records

I am encountering a strange issue when using mysqldbcompare to compare two MySQL DBs(one is a master, the other its slave). I noticed that the tool notes that the AUTO_INCREMENT values of this ...
0
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1answer
31 views

Blob datatype issue with log file

I am getting continuously below error message in mysqld.log [ERROR] InnoDB: The total blob data length (10152274) is greater than 10% of the redo log file size (3072). Please increase ...
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0answers
31 views

MySQL won't start - e44 InnoDB: Assertion failure in thread 3652 in file fil0fil.cc line 5594

MySQL 5.6 is installed on my Windows 2008 server. The service is refusing to start. The error log reported: 2014-12-02 20:27:16 1664 [Note] Plugin 'FEDERATED' is disabled. 2014-12-02 20:27:16 634 ...
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0answers
16 views

Mysql Multi master replication - auto_increment for tables with natural primary key?

I am thinking about using Master-Master replication using Mysql 5.6.19 with InnoDB as the engine. From what I have been reading, looks like I should be using auto_increment_offset and ...
2
votes
2answers
348 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 ...
0
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1answer
17 views

Question on turning on GTID for MySQL master and slaves

I came across the interesting article by Facebook's Engineering team where they were able to deploy GTID in MySQL at a large scale : ...
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0answers
21 views

Sudden (and drastic) decrease in commands/second on replicated slave

On a slave that uses statement-based replication from a failover of master (all running mysql 5.6), the number of queries executed per minute has suddenly decreased from ~20k during peak traffic to ...
0
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1answer
178 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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2answers
7k views

InnoDB: Error: Table “mysql”.“innodb_table_stats” not found after upgrade to mysql 5.6

I upgraded to mysql 5.6 from 5.5, and now my logs are littered with such messages on startup I found a possible solution here, but it does not seem official. ...
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3answers
53 views

Question on having a MySQL 5.1 replicate from a MySQL 5.6 DB

I have a question in regards of what potential issues that might happen with a MySQL 5.1 DB that replicates from a MySQL 5.6 DB. I know the risks involved based on resources such as ...
0
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1answer
27 views

Mysql Server 5.6 Mysqld high memory consumption

I have MySQL Server 5.6 installed in a development machine with these specs: RAM: 4 GB Windows 7 Professional 64 bits Intel Pentium CPU G630 @ 2.70 GHZ Since I installed the MySQL Server, the ...
0
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1answer
180 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 ...
1
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1answer
139 views

Innodb issue is preventing MySQL from starting [closed]

For some reason mysqld refused to start after I rebooted my server. Now when I try to start it I will get the following error: [root@vps1 ~]# service mysqld restart ERROR! MySQL server PID file ...
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1answer
21 views

How do I add databases from a crashed MySQL 5.1 server to a new MySQL 5.6 server

I was running MySQL 5.1 on a personal web server that recently died. The system drive is non-operational, but I have my second hard disk where I had installed all of my programs. This drive has my ...
0
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1answer
58 views

MySql - Reorder primary key with auto-increment

I have two table(s) in mysql as follows : CREATE TABLE UserMst ( UserID mediumint(8) unsigned NOT NULL AUTO_INCREMENT, UserName varchar(20) NOT NULL, CreatedOn timestamp NOT NULL DEFAULT ...
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0answers
27 views

Differing AUTO_INCREMENT values between 5.1 vs 5.6 slaves

I have a MySQL 5.6.21 slave and a MySQL 5.1.73 slave that are both replicating from the same MySQL 5.1.73 master. I noticed that for several of the tables ( I said several because when I try to rerun ...
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1answer
26 views

How to investegate MySQL crash on windows?

I have MySQL 5.6.19 running on Windows Server 2008 R2. I have 3 servers A, B, C Server A is a stand alone server. This server had data that can't be placed on SERVER B (ie. users information.) ...
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1answer
23 views

Myloader command: Table doesn't exist

I took the backup of mysql database using mydumper command: mydumper -B mydb -o /backup/oct3 -s 500000 -c -m -S /tmp/mysql.sock -u root -p password@123 -v 3 Now, I am restoring mysql database ...
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0answers
37 views

mysqldbcompare shows checksum fail but row differences passes between MySQL 5.1 and 5.6 databases

I have started to try using mysqldbcompare to help me compare two databases(one is MySQL 5.1.73 and the other MySQL 5.6.21) that are each about 5 gigs with lots of tables, but the databases are ...
0
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1answer
41 views

Accuracy of mysqldbcompare vs other tools like pt-table-checksum

I was curious to hear what everyone's experiences are with using mysqldbcompare vs pt-table-checksum( from Percona Toolkit ) to find the differences between two MySQL databases. I have heard that ...
1
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1answer
46 views

Using pt-table-checksum to compare a slave's DB to another slave

I understand that pt-table-checksum can do checksum compares between a master's DB and a slave's DB easily. However, let's say your master has two slaves replicating from it for the same DB, i.e. ...
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0answers
27 views

Using partitioned table, and dealing with auto_increment PK

I have a big table (>100 million rows) that tracks user's activities. It has an ID, which is PK and has auto_increment property. This is the only unique key. Table also has userid and datetime column. ...
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0answers
45 views

innodb slower much slower than expected

Trying to figure this one out and I apologize for not providing a lot of information from the start (if you need further let me know and I can try to provide it). Query is performing very poorly - it ...
0
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0answers
72 views

MySQL has gone away with two connections

I'm using MySQL 5.6.19 on OSX 10.9.5 (DMG installation from mysql.com) and I'm receiving the infamous MySQL has gone away when I try to open two connections to this server. If I try connecting from ...
1
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1answer
443 views

Any known issues upgrading from MySQL 5.1.73 to 5.6.21?

I am planning my MySQL DB ver5.1.73 running on a CentOS 6.5 machine to MySQL 5.6.21. I understand the basic procedure for this based on what I have read on StackOverflow, but I was curious if anyone ...
0
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1answer
46 views

I noticed that my MySQL slave's DB size is smaller than the Master's DB

I have a very simple setup of a master MySQL DB with one slave MySQL DB replicating from it. Initially, when setting up the slave, I used mysqldump to get an initial DB dump from the master like ...
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1answer
22 views

Why MySQL init_connect variable gets updated after rebooting?

After SET GLOBAL init_connect=''; query everything works fine. However after rebooting the server or restarting the MySQL service it updates the init_connect value to some random value (OÇÿOÇÖ). Do I ...
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2answers
6k views

MySQL 5.6 Failure

I have the following in RPM_UPGRADE_HISTORY in /var/lib/mysql MySQL RPM upgrade to version 5.6.10-1.linux_glibc2.5 'pre' step running at Fri Mar 15 15:41:26 EDT 2013 ERR file(s): -rw-r----- 1 mysql ...
0
votes
1answer
57 views

Calculating difference between consecutive timestamps. Error when i reach the hour mark

I am using MySQL I have a table that contains among other things an id a time in the format date:time (YYYYhhmmss) and a readingvalue. The difference between each reading value is 300 seconds but ...
1
vote
1answer
78 views

MySQL service stops after trying to grant privileges to a user

I am using MySQL 5.6, I was trying to create a super user for specific database but I got ERROR 1396 (HY000): Operation CREATE USER failed for 'superuser'@'%' Then I thought maybe there is already ...
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0answers
57 views

Create separate temporary table/view and variables for every query

How can I create something similar to VIEW or TEMPORARY TABLE for every query separately? I have 1 process, it creates and holds one connection (doesn't destroy connection after request, so doesn't ...
3
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1answer
397 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?
1
vote
1answer
27 views

MySQL Server 5.6 wont start on Windows

I'm having an issue getting MySQL Server 5.6 (community edition) running. it was working just fine until I restarted my server. Now it wont start at all. after doing a bit of research, I discovered ...
1
vote
1answer
25 views

returning the number of columns in a row that are zero in mysql

I have a table that contains amongst other things a datetime column, and 4 other columns that contain either a zero or a number. I would like to return how many columns in a row contain a zero in ...
0
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1answer
35 views

Mysql - MyISAM Default order

We are using Mysql V5.6. We have a MyISAM table. when we open the table, the records will be displayed in some order instead of primary key order. Even when selecting the records will not be retrieved ...
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2answers
2k views

Master - Master replication Duplicate entry

I've got a Master - Master replication setup and it worked fine for a couple of days but I keep getting: Duplicate entry errors after a few days... My setup is as follow: One server in The ...
0
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2answers
57 views

MySQL excessive tmp disk tables after Upgrade to 5.6

After upgrading two MySQL-Servers which run Master-Slave replication from Percona MySQL 5.5 to Percona MySQL 5.6 an excessive amount of temporary Tables gets created on the slave. The Master seems to ...
3
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1answer
132 views

Is it mandatory to enable --log_slave_updates with MySQL Replication using GTID? [duplicate]

I'm setting up 5.6 Percona Mysql, in order to enable GTID should I have to enable log_slave_update on both Master and Slave ? If I should enable log_slave_update, then I'm counting this to CONS for ...
0
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1answer
42 views

Subquery on timestampdiff only allows for 1 result, how do I scale this for all results?

I'm currently writing up a query which is meant to output data to show curves of power profiles, and I'm facing a slight problem. So far, I've managed to do this: select datetime, PLANT_STATUS, ...
0
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2answers
176 views

mysql - query records to fetch by time stamp

I've a MySql 5.6 DB with a simple table (MyISAM) . | UniqueKey | TimeStamp | ------------------------- | 1 | 1024125412 | | 2 | 1024125413 | | 3 | 1024125414 | My table ...
10
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2answers
208 views

MySQL instance stalling “doing SYNC index”

Problem An instance of MySQL 5.6.20 running (mostly just) a database with InnoDB tables is exhibiting occasional stalls for all update operations for the duration of 1-4 minutes with all INSERT, ...