MySQL version 5.5 - please also tag with mysql for search purposes.

learn more… | top users | synonyms

1
vote
3answers
217 views

Mysql 5.5.45 crashing after refreshing web page rapidly(Too Many Connection warning)

I am using ec2 aws instance for my wordpress webiste.after every 5 to 10 minute and randomly my website going down i tried lots of things like increasing buffer memory ,memory limit but that not ...
0
votes
0answers
33 views

Is double one to many a bad design? It looks duplicate when joining both one-to-many tables

Suppose I have user table, book table, DVD table. User can borrow n book, n DVD at the same time, a book or a DVD can be borrowed by a user. (I understand it is many-to-many situation in real life, ...
0
votes
0answers
40 views

Mysql Replication break Error_code: 1032

Created new slave replication, it was working fine but suddenly after 2 days its giving me this error and the replication stopped. Both on Centos 6.7 Master Version ...
0
votes
0answers
21 views

MySQL replication Got fatal error 1236

I am getting this error when starting a new slave replication from master. Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: 'log event entry exceeded ...
3
votes
1answer
110 views

MySQL replication - invalidating query cache entries (table)

We lately moved to MySQL V5.5 on CentOS release 6.7 with master and 2 slaves. Since then the replication process lags a lot behind the master with the line in the process list of: invalidating ...
0
votes
0answers
245 views

Using SSL produces error “protocol version mismatch”

Using MySQL Server (5.5.46-0) on Ubuntu 14.04.2 with protocol version 10. Configuring SSL and defining SSL cert files locations in My.cnf file. Have defined absolute paths for CA-cert.pem, ...
0
votes
1answer
23 views

Mysql Replication backup and restoration failed multipal time

I tried restoring MySQL backup several time but unfortunately it gets failed by some or the new reason. I have 2 host Master & Slave with below details. Server1_Master os-centos6.7 mysql- ...
0
votes
1answer
77 views

Restoring MySQL dump ERROR 1449

I took hot backup (dump) from my Master MySQL DB with below command mysqldump -uroot -p --skip-lock-tables --single-transaction --flush-logs --hex-blob --master-data=2 -A > ~/dump.sql ...
0
votes
1answer
47 views

MySQL optimizer difference between 5.6.27 and 5.5

We've just updated the MySQL version of the database of one of our clients from the 5.5 to the 5.6, everything is working fine except one simple query which is causing us troubles. Having the ...
2
votes
0answers
77 views

MySQL: Is the read committed isolation level safe with mixed binary log format?

When using the MIXED format with the READ COMMITTED isolation level, am I safe? The docs state (http://dev.mysql.com/doc/refman/5.5/en/set-transaction.html#isolevel_read-committed) If you use ...
2
votes
1answer
55 views

why my MySQL binary log file size is so small?

I have a lot of small binary log files , each of them just only 126 Bytes -rw-rw----. 1 mysql mysql 126 Jan 6 16:13 mysql-bin.000001 -rw-rw----. 1 mysql mysql 126 Jan 6 16:16 mysql-bin.000002 ...
0
votes
1answer
21 views

load data infile in mysql server 5.5 can't load data when foreign key exist

I have a database (TPC-DS benchmark base) with 24 tables(17 dimensions tables, 7 facts tables) I generated this database then I created it in mysql server 5.5 I used the instruction load data local ...
1
vote
2answers
78 views

Can error 1231 after importing a MySQL database be a compatibility issue?

ERROR 1231 (42000): Variable 'character_set_client' can't be set to the value of 'NULL' Query OK, 0 rows affected (0.00 sec) ERROR 1231 (42000): Variable 'collation_connection' can't be set ...
2
votes
1answer
56 views

Joining two fast subqueries is very slow

DB: MySQL 5.5.20 (WampServer) OS: Win 7 HDD: Western Digital 3TB Caviar Green, 3.5", IntelliPower, 64MB, Sata3 (WD30EZRX) Memory: 8GB my.ini: http://pastie.org/private/s7l9aadyi0qhfl5bcrnnqq I've ...
2
votes
2answers
89 views

Optimizing a simple query on a large table

DB: MySQL 5.5.20 (WampServer, default configuration) OS: Win 7 HDD: Western Digital 3TB Caviar Green, 3.5", IntelliPower, 64MB, Sata3 (WD30EZRX) Memory: 8GB MySQL my.ini: ...
0
votes
0answers
106 views

Change MySQL stored procedure 'Database Collation' name

I have imported a DB from Local machine to server machine. While importing the Database, the character set values of the DB are set by system default to "Latin". I have changed the character set to ...
2
votes
2answers
32 views

MySQL Database Archive

We have 300 databases in our environment mixed of MyISAM and Innodb(innodb_file_per_table has been enabled) tables.Using MySQL 5.5.19 version. I we are planning archive inactive database.Is there any ...
3
votes
2answers
126 views

How to convert timezone in MySQL using the timezone name?

I want to convert date from one timezone to another timezone in MySQL, MySQL query which I am trying is SELECT DATE_FORMAT(CONVERT_TZ('2015-12-18 06:00:00', '+0:00', '-05:00' ),'%b %d %Y %h:%i %p') ...
3
votes
1answer
48 views

How we can recover MySQL database (Innodb,myisam)

I have found some recovery tool innodb-recovery but it works only on linux machine, I would like to know how to recover innodb tables on windows. Transaction ID based recovery Cancel based, Change ...
2
votes
1answer
80 views

Query about MySQL Semaphores in Engine Status

During a recent problem / slow down with one of our slave databases I noticed that when I ran SHOW ENGINE INNODB STATUS. I am getting the following: ---------- SEMAPHORES ---------- OS WAIT ARRAY ...
0
votes
0answers
2k views

mysqld upgrade 5.5 -> 5.6 mysql Error: Failed while fetching Server version! Could be due to unauthorized access

After updating mysql with yum to 5.6 I am getting such an error message when trying to run mysql [root@host rpm]# mysql_upgrade Looking for 'mysql' as: mysql Looking for 'mysqlcheck' as: mysqlcheck ...
1
vote
3answers
113 views

why in explain in mysql row count is very high

i am using mysql, here is query- mysql> select count(*) from payments as Payment WHERE `Payment`.`fordate` BETWEEN '2015-11-28 00:00:00' AND '2015-12-31 23:59:59'; +----------+ | count(*) | ...
0
votes
1answer
37 views

Why is MySQL 5.5 ignoring this index?

I have a pretty simple query that is not using an index I expect it to because of the WHERE. Table: CREATE TABLE `cba_device_log` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `device_id` varchar(30) ...
0
votes
0answers
37 views

MySql server failing to start

I was reinstalling backup image on Raspberry Pi and I noticed that MySql server isn't running. I've looked in /var/log/syslog and I bumped into this: Dec 4 20:06:00 node mysqld_safe: Starting mysqld ...
1
vote
1answer
83 views

MySQL binlog does not show SQL statements

While checking the binlogs, it struck me that I cannot see any SQL statement. Here's an example: $> sudo mysqlbinlog --database=securities --start-datetime='2015-11-26 13:00:00' ...
1
vote
0answers
13 views

Trigger quest updating a column as data is entered in multiple columns at different times

What I am looking at is I have a project I'm doing and within it there is to be a column that would be turned into a GPA based off their individual assignment scores. My question is would it be ...
0
votes
0answers
19 views

MySQL Trigger at Insertion with nested CAST

So I'm using MySQL 5.5 and trying to insert a VARCHAR as ID (since my teacher requested so), I am trying that each time there is an insertion of a new USER, a trigger automatically assigns an ID to ...
0
votes
1answer
28 views

Optimising a query with two aggregate fields

I have a table in a MySQL 5.5 database with around 7 million records, with fields typeId, regionId, scanTime, scanId and a query that returns around 239,000 results. For every combination of typeId ...
0
votes
0answers
21 views

adding rows vs creating new tables MySQL

I am having a table where I have not more than 15 columns (maximum data type of any of those column is SMALL INT and only a single column of type VARCHAR with maximum 20 chars only). Out of those 15 ...
0
votes
0answers
18 views

server response is getting slow day by day

MySQL server 5.5 > running in Linux Box is getting slow. MySQL server is being used by Java Web application, please help me to figure out the problem.
0
votes
1answer
474 views

#1041 - Out of memory issue in mysql [closed]

I am using Amazon RDS db.m1.medium instance. It has at least 40-50 database and atleast 10k table. For last one year it was working fine, but today I was altering one table It started giving error. I ...
0
votes
1answer
34 views

MySQL order by is equal, in what order are the results returned?

I use mysql Ver 14.14 Distrib 5.5.44, for debian-linux-gnu (x86_64) using readline 6.3 I have rows that are ordered by an order column. Turns out, many times, the order number is the same, say 1. ...
0
votes
1answer
64 views

MariaDB is Forgetting Previous Auto Increment IDs

I'm using MariaDB 5.5.39, and it seems like it is forgetting the max id of the auto-incremented primary key if I delete all rows from the table and then too much time passes before another row gets ...
0
votes
1answer
27 views

selecting duplicate values with a condition from a mysql table

I have the following table in mysql: Key DI CI FD FA NM Valid_from Valid_to 0 1224468 123 2012-06-30 3 6 2013-01-23 9999-12-31 1 1234567 123 2013-12-31 3 ...
0
votes
0answers
34 views

Special Operators in MySQL

I am going through the MySQL doc here and reading about the operators. I couldn't find anything related to special operators over there. Hence I am wondering, is there anything that exists and falls ...
1
vote
1answer
299 views

Mysql Tuning for a small server

I have a small Cloud Server running under Ubuntu 2 core, 2GB ram and 2GB swap, with Plesk Panel, Apache, Nginx as reverse proxy and Mysql 5.5. I have about 18 domains hosted here and each domain has ...
0
votes
0answers
22 views

How can I get month wise leave for a financial time period for an employee in MySQL?

I have the following columns in a table: start_date end_date no_of_days start_day_half -- (if the starting day to be a half day then its flag is 1) end_day_half -- (if the end day to be a half ...
0
votes
1answer
31 views

Unable to connect to mysql remote

I am struggling to connect MySQL database with my application, I am having the following set up 3 Applications running in cluster mode and trying to connect with same DB. MySQL database running on ...
0
votes
1answer
61 views

Insert and Update Queries Log in MySQL

I have sensitive information in multiple databases on the MySQL Server. I need to record which user have inserted or updated the record and incase of update we should be able to see the previous and ...
1
vote
0answers
22 views

MATCH(title) AGAINST('test 11' IN BOOLEAN MODE) can't search number

SELECT *, MATCH(title) AGAINST('test 11' IN BOOLEAN MODE) AS Score FROM search_table WHERE `date` > DATE_SUB(NOW(), INTERVAL 1 MONTH) AND MATCH(title) AGAINST('test 11' IN BOOLEAN MODE) ...
1
vote
0answers
44 views

What should be the best practice to alter the table using the script to shift columns

I have a MySQL table which has columns 93 in it. All first 92 columns are INT(11) and the last column is of type DATE. |number|0|1|2|3........|88|89|90|ddate| | | | | | ........| | | | | ...
0
votes
2answers
37 views

How to reconfigure primary key columns

I have a series of tables in my database that are using DATE as the primary key. I would like to reconfigure the tables so that an AUTO_INCREMENT ID field is the primary key. What is the best way to ...
0
votes
0answers
26 views

MySQL Event Failed to Run

We have a selection of MySQL 5.5 Databases running on Debian Linux, We use MySQL Scheduled Events for certain processes, and until now they have always run as expected. But yesterday we had to move ...
0
votes
0answers
59 views

mysqldump slows down to a crawl

I have a table with ~10mln records that I want to dump. Running: mysqldump --opt --skip-extended-insert database table > table.sql While monitoring progress I have noticed that first 9.8mln ...
0
votes
0answers
10 views

RDS MySQL Storage and N/W Usage

have Single Schema and single MySQL Instance on RDS Where my website users are creating app and app data stored in MySQL database in my schema each app has Unique id. One user may have one or more ...
1
vote
1answer
43 views

Not able to connect to local MySql database “only” when connected to VPN on VM [closed]

Setup: MySql installed on my Mac using Xammp VM installed using VMware Fusion running win XP. I am able to connect to the mysql database through my VM normally. As soon as I connect to a VPN it ...
0
votes
0answers
72 views

Memory usage still growing

I have problem with my production mysql server. The memory usage is still growing and I don't know why. Trouble started when we changed the server. My mysql version: 5.5.44-0+deb8u1-log - (Debian). ...
0
votes
0answers
27 views

Enormous MySQL 5.5 Handler_read_rnd_next

The value of Handler_read_rnd_next is actually 91,3 G on my Database server but I am pretty sure that all tables have proper indexes. I am 100% sure that there is no query with a WHERE clause that ...
0
votes
2answers
73 views

Mysql slave use more memory than master server

I have used top command to check memory usage on both mysql master and slave server. Master is using only 12% of allotted memory but slave is using 82%. configuration wise both are same. can anyone ...
0
votes
0answers
20 views

Database design: history - transactions, states, durations?

I have not delved into this type of db info before, and it seems foreign to me what I need to do. So I would ask if this seems familiar to you, and is there a way this is generally done? (And would ...