An open-source, relational database management system.

learn more… | top users | synonyms

16
votes
2answers
3k views

Will my MySQL query continue to run even if my ssh connection drops?

I've connected to a server over SSH and logged in to mysql, and asked it to run a query (the results of which are dumped into a CSV) that could take well over an hour. Although I have instructed my ...
12
votes
2answers
4k views

FreeBSD: “Too many open files” but should be able to open another 160,000 files

I have a FreeBSD 8 system running ZFS, with a MySQL 5.5 server which is about 355GB and projected to grow to be a couple of Terabytes. MySQL is triggering errors about "Too many open files" on ...
11
votes
2answers
8k views

Installing mysql-server in vagrant bootstrap shell script (how to skip setup?)

I did try to install mysql-server on my Vagrant Ubuntu 12.04 LTS virtual machine. When I did so, the setup auto-starts. I can see this in the Vagrant output: While not mandatory, it is highly ...
9
votes
1answer
644 views

MySQL gets killed by OS every 25 days or so

About 4 months ago we migrated from MS SQL Server to MySQL 5.5. Since then we have been experiencing an issue once approximately ever 25 days since where CentOS runs out of memory and as a result it ...
8
votes
2answers
7k views

Get a progress indicator when importing MySQL databases

I often import MySQL databases, and this can take a while. There is no progress indicator whatsoever. Can one be shown, somehow? Either records imported, MB imported, or tables imported... anything is ...
7
votes
1answer
5k views

OOM Killer - killed MySQL server

On one of our MySQL master, OOM Killer got invoked and killed MySQL server which lead to big outage. Following is the kernel log: [2006013.230723] mysqld invoked oom-killer: gfp_mask=0x201da, ...
7
votes
5answers
4k views

Fedora 16 strange /tmp permissions: mysqld will not start

I installed mysql on a brand-new Fedora 16 server and it would not start. This is the line from the log file (^G and all): ^G/usr/libexec/mysqld: Can't create/write to file '/tmp/ibNPyIlu' (Errcode: ...
7
votes
2answers
19k views

How can I completely reinstall mysql?

I had to reboot in the middle of a large data import. I only have one mysql database, which has now been corrupted. How can I completely remove mysql and reinstall it? I've tried apt-get purge ...
6
votes
2answers
555 views

Back up mysql server

I want to backup all databases, users and etc on our mysql sever. I have come across the command mysqldump and believe I can use it like this? (Trying to backup a REMOTE server to our LOCAL machine) ...
6
votes
1answer
4k views

How can I determine the connection method used by a MySQL client?

When using a MySQL client (e.g. mysql) how can I determine whether it connected to the server using a Unix socket file or by using TCP/IP?
6
votes
3answers
19k views

How can I upgrade MySQL in Debian using apt-get?

I'm using the Turnkey Linux virtual machine. The version of Debian in there is apparently on the "Wheezy" upgrade path (if that's what you call it). I'm not completely comfortable with Linux, as you ...
6
votes
2answers
12k views

cronjob for automatic DB backup to date prefixed file

I am using the latest Linux Mint. I was wondering if it's possible to create a special cronjob for a database backup. In my /etc/cronjob file I have the following code: # Minute Hour Day of ...
6
votes
1answer
21k views

Anyone know a good gui to MariaDB? [closed]

I'm using MariaDB instead of MySQL in Slackware 14.1, and I need a graphic manager like MySQL Workbench. Can anyone suggest me something? I tried using MySQL WorkBench but it could not connected with ...
6
votes
1answer
885 views

/etc/passwd sql with bash access

I just got a CentOS VPS and was reviewing the passwd file and saw this: mysql:x:498:499:MySQL server:/var/lib/mysql:/bin/bash Is bash necessary for mysql?
5
votes
7answers
3k views

Encrypt a password the same way mysql does

I've created a user ... but forgotten the password mysql> create user 'blayo'@'%' identified by 'right'; Which Linux command line tool can encrypt the password the same way mysql 5.5 does ? ...
5
votes
6answers
14k views

How to install MySQL Workbench on Fedora 21

Is there an easy way to install MySQL Workbench on Fedora 21? I could not find a RPM package and failed at compiling it from source because I am using MariaDB and therefore was unable to install ...
5
votes
2answers
4k views

High iowait while the wMB/s is low

I was indexing a MySQL table. It makes a high load on that computer. It seems due to a high iowait. But it also shows that the wMB/s is only 2.87. Isn't even a common SATA HDD able to handle more ...
5
votes
5answers
2k views

Multiple ssh sessions in single command

I'm trying to copy a database from one server to another. I tried using the following command and it's getting tied up on entering the ssh passwords. If I put in one server's password, it complains ...
5
votes
1answer
22k views

Where does MySQL store its databases on Debian?

Our system crashed and we're trying to recover our data. The disc is fine, but the OS is gone, so I'm trying to get at the actual MySQL database files. Does anybody know where to look for them in a ...
5
votes
1answer
7k views

start mysql server at boot for debian

I am using Debian Etch and I have following this and tried to write a script like this to auto start mysql server at boot: #! /bin/sh # /etc/init.d/blah # # Some things that run always sudo ...
5
votes
1answer
4k views

How to configure the MySQL APT repo on Ubuntu, on a non-interactive shell?

I want to install MySQL 5.7 on Travis CI, which runs Ubuntu 12 virtual machines. I'm willing to use the official MySQL APT repo: wget ...
5
votes
2answers
6k views

MySQL max_open_files more than 1024

While starting MariaDB I got [Warning] Could not increase number of max_open_files to more than 1024 (request: 4607) $ sudo systemctl status mysqld ● mysqld.service - MariaDB database server ...
5
votes
3answers
7k views

Will yum remove mysql-server delete my databases?

My MySQL server has broken down, and I can't figure out why. Trying to do a yum reinstall I get this: Error: mysql-server conflicts with mysql-server I figure that's because the server already had ...
5
votes
3answers
9k views

How can I check if mysql is installed using a bash script?

I need to check if mysql is installed from within a bash script. What would be an efficient way of doing that? I thought I could do this: if [ ! -f `which mysql` ] ; then echo "foo" fi But I ...
5
votes
1answer
1k views

Batch importing .sql files

I have a bunch of .sql files in a directory that I need to import. Although I can do it manually, for scripting purposes I need to be able to apply them in bulk. How can I do that though? What ...
5
votes
2answers
174 views

MySQL has over 95,000 connections but processlist is empty?

I have a server that is running mysql and it's using a lot of memory. I run: mysql > show status like '%onn%'; +--------------------------+-------+ | Variable_name | Value | ...
5
votes
1answer
743 views

I get the Error “mysqld dead but pid file exists”

I get the Error mysqld dead but pid file exists This happens every couple of hours. If I restart it works fine and then goes down again. [root@ip-10-0-0-149 log]# df -h Filesystem Size Used Avail ...
5
votes
1answer
4k views

MySQL stop/waiting issues; “can't connect … through socket” [duplicate]

So this was my first time putting up a LAMP stack on a Bodhi machine (previously experience with WAMP, and LAMP on 10.04); I got Apache going, and a Drupal install begun, then I go to create a new ...
5
votes
4answers
2k views

Selinux is denying access to mysqld

I have a script that dumps a mysql database. It then compresses the file and this gets stored in my home folder by using cron. The problem is I seem to be getting an error message. mysqldump: ...
4
votes
2answers
12k views

PHP on centos 6 not working

I have installed PHP, MySQL, Apache on CentOS 6, now I have restarted the Apache and mysql, to test PHP i have created a index.php on /var/www/html/test/ now once i go to localhost/test/index.php then ...
4
votes
2answers
19k views

Mysql query resultset in bash script

I am using the bash script to connect to the mysql database and execute a query. I use the below script to connect to the database and execute the query. #!/bin/bash Total_Results=$(mysql -h ...
4
votes
1answer
2k views

Convert mysql count(*) to int in bash?

I'd like to execute this and check if count is 0, 1 or > 1 in bash. mysql -e "select count(*) from mydb.mydb;" The output is: +----------+ | count(*) | +----------+ | 0 | +----------+ I ...
4
votes
1answer
574 views

When saving INTO OUTFILE from mysql on a systemd based system, the output file is grabbed by systemd — why?

I regularly run simple reports from a mysql (actually, mariaDB) database: MariaDB [acts]> SELECT resolution, title FROM acts ORDER BY resolution INTO OUTFILE '/tmp/acts-titles.txt'; Recently I ...
4
votes
4answers
914 views

~/.mysql_history size limit

My .mysql_history file size is limited to 300 lines. I would like to keep the mysql history unlimited. However, I couldn't find any way to do it (in man page, and in google) Can somebody please ...
4
votes
2answers
9k views

Can I copy a MySQL database by copying the files? What do the files contain exactly?

I am using MySQL database and using an Ubuntu Linux machine. My database named db_test , I notice that under path /var/lib/mysql/db_test ,there are files suffix with .frm, .MYD, .MYI like following: ...
4
votes
1answer
422 views

The file /usr/libexec/mysqld does not exist or is not executable

Whenever I try to start MySQL via the command service mysqld start I get the following error: MySQL Daemon failed to start. Starting mysqld: [FAILED] ...
4
votes
1answer
156 views

If I'm logged in as root, how do I restart mysql or apache with options?

I know the commands to restart/stop/start, but when I try to pass options it doesn't seem to work! CENTOS 6, MySQL 5.14 service mysql restart service httpd restart Then I tried this: ...
4
votes
1answer
487 views

forward all mysql traffic to a ssh tunnel

I have a local application that needs to connect to a remote mysql server at 40.40.40.40:3306 The main firewall blocks all connections but ssh, I can set up a ssh tunnel and connect to the server ...
4
votes
1answer
1k views

Linux : Alternative of install_name_tool of MAC in CentOS

I am looking for alternative of install_name_tool of MAC in CentOS. Exactly I want to build MySQL on non default location. Also the shared libraries of the mysql binary should be on non default ...
4
votes
1answer
713 views

MySQL server-id not being set with Fedora 16

I am setting up a mysql slave on a Fedora 16 system, and the server_id is not being set properly. My /etc/my.cnf is: [mysqld] server-id=16 datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock ...
4
votes
2answers
4k views

'mysql' user and group creation, ownership settings

I know what the linux command chown does, I used it to change the ownership or group of a file. If there is a MySQL installation on a Ubuntu machine, I saw some people doing the following thing: ...
4
votes
1answer
2k views

MySQL server won't install to a new os (Debian, Ubuntu)

Today I wanted to install (on a new VPS with new OS) a MySQL server. I used this command: apt-get install mysql-server mysql-common mysql-client-5.5 I tried with Debian 7 (x64 and x86) and Ubuntu ...
4
votes
1answer
2k views

How can I fully remove a tablespace from MySQL?

I have a MySQL database called camera_main_live, which I administer using Adminer. It is, to all appearance, empty. So when I want to add some content, I begin by running this script (with Adminer set ...
3
votes
5answers
3k views

bash restart mysql when it gone run well in SSH part, but not in cronjob

My system is centos 6.5, I write a simple bash shell to check if mysql is crashed, restart service again. I put it in /home/myspace/mysql.sh chown root:root /home/myspace/mysql.sh then run every ...
3
votes
1answer
494 views

Add 30 days in date

Using bash or mysql , how can I add 30 days in user expiry table? Example I have DB name USERS and table expiry like this: USERNAME EXPIRATION JOHN 2015-09-26 I want the command to take ...
3
votes
1answer
4k views

Can't start mysql on Fedora 19

I'm running Fedora 19 and I have installed MySQL using yum install mysql. When I issue the mysql command, I get the following error message: ERROR 2002 (HY000): Can't connect to local MySQL ...
3
votes
1answer
1k views

redirect error out to standard output

I can save the error out in the same file as standard out. I have used this method below. The problem is that the error out is "always" shown at the top. In the example given below the error relates ...
3
votes
3answers
5k views

MySQL Workbench Cannot start SSH tunnel manager

I don't know why this error is happening when I try to connect by MySQL Workbench. Cannot start SSH tunnel manager. I'm using slackware 14.1 and installed all dependencies.    
3
votes
1answer
139 views

Why are some file changes not shown in tail -f?

I tried to follow the mysql history file with: tail -f ~/.mysql_history in another window I entered as the same user: mysql -u someotheruser -p and none of the following commands are shown in my ...
3
votes
3answers
912 views

Do I need to stop processes like mysql or apache before “reboot”?

I have been wondering if issuing a reboot command safely stops running LAMP processes like MySQL or Apache?