Questions tagged [my.cnf]

my.cnf is the configuration file for MySQL server, client programs, and utilities.

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Does mysqlnd expose PDO connection data to process/log files?

So I was trying to figure out how to write an automated backup script for php on a shared webhost to execute using mysqldump, with no root access to core php.ini or mysql config on the remote database ...
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1answer
2k views

Mysql 5.5 InnoDB growing CPU - Going crazy

Good morning, I'm currently facing a problem where CPU usage keeps going up until the server crash. I've tried multiple best practices proposed in this forum and on Percona, reinstalled the server ...
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673 views

Galera: any drawback of enabling wsrep_log_conflicts and cert.log_conflicts?

We have a HAProxy which balances reads and writes to only one (of three) Galera nodes. If this balancing works fine, the parameters wsrep_log_conflicts and cert.log_conflicts should never log any ...
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731 views

Slow MariaDB performance my.cnf

I migrated my eCommerce website database (Magento) from MySQL to MariaDB (10.0.25-MariaDB) and my site isn't performing as well as it did with MySQL. I've gone through my.cnf several times but to be ...
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1answer
317 views

Where do i change the my.cnf on mysql cluster

I'm trying to change the max_allowed_packet setting on mysql cluster (version 7.4.8) - i have 5 nodes 2x SQL Node 2x Data Node 1x Managament Node I have updated the my.cnf on all of the servers -> [...
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2answers
7k views

MySQL 5.6 OS X 10.8: how tell if my.cnf read?

With mysqld running, I expect to see that /etc/my.cnf has been used by at least one of the commands ps aux | grep mysql | grep -v grep mysqladmin variables | grep defaults-file showing the value of ...
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1answer
2k views

Got error while reverting mysql 5.7 to mysql 5.6

Got error while doing mysql service restart. Googled a lot, but nothing fix my issue. [ERROR] Fatal error: mysql.user table is damaged or in unsupported 3.20 format. 2016-04-23 11:10:38 22185 [...
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1answer
9k views

Mysql Optimization suggessions

I have an InnoDB database table with more than 2 million rows. I am running efficienty indexed queries to reduce server load, but site becomes slower day by day. I ran Mysqltuner.pl to identify any ...
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2answers
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I want to set lower_case_variables to 1 but I'm unable to locate my.cnf

MySQL was started with service mysql start only, but it is not showing the default path of my.cnf: [root@localhost home]# ps -ef|grep mysql root 23505 1 0 19:23 pts/4 00:00:00 /bin/sh /...
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How to set slow query log in MariaDB my.cnf?

It should be easy, but when I put these lines: log_slow_queries = 1 long_query_time = 1 log-slow-queries = /var/log/mysql/slow_query.log log_queries_not_using_indexes in [mysqld], MariaDB fails to ...
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Connection timed out & MySQL server has gone away with innodb engine

I have created chat application which ping server every sec for messages. Currently I have done load test with httperf, with 500 request/sec. "Connection timed out & MySQL server has gone away ...
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90k views

MySQL: bind-address 0.0.0.0 in my.cnf does not work?

I'm new to mysql. I want to connect to mysql server using whatever ip I want. I read that all I have to do is to add to my.cnf file the line bind-address = 0.0.0.0. That's what I did. I restarted ...
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971 views

Optimization of variables in my.cnf (mysql) for Drupal

I just get a Dedicated Server running UBUNTU and I need to optimize the variables in my.cnf for Drupal 7. I understand that this is tailed job. Then Is there any tool to help me to do this? I am a ...
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1answer
7k views

Of the multiple cnf files in /etc/mysql/conf.d/ dir, which would be the last one to be read (and will enventually take precedence)?

For some reasons (and only for some days to come) we are going to have 2 cnf files in /etc/mysql/conf.d directory, apart from the default one /etc/mysql/my.cnf. Now I know this can be disastrous, and ...
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Suggestion To Improve My.cnf INNODB

I'm after suggestions on how to increase mysql performance on my server, any help would be greatly appreciated. CPU - 4 core RAM - 16GB Databases - 14 Innodb databases with around 20 tables in each (...
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2answers
935 views

Errors while creating multiple mysql-5.5 instances

I have installed 3rd mysql instance on my testing server. 2 instances already running without any issues. When I installed 3rd instance by mysql-5.5.30 zip source, it installed successfully but when ...
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1answer
2k views

unknown variable 'log_slow_verbosity=query_plan'

What is the use of log_slow_verbosity = query_plan parameter in my.cnf ? I got an error when installing MySQL in my machine because of this parameter.
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1answer
2k views

Made changes to my.cnf and mysqld wont restart - no backup

I thought I'd be clever and update my.cnf file to add ft_min_word_len=2 and didn't back it up first. I will never make that mistake again. Luckily, our project is still in production and no harm done. ...
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397 views

Proportion of MySQL variables

I made some research on MySQL performance. After doing some tests and verifyed the improvement, (thank you guys) I end up asking myself: "Is there any formula or metric between groups of variables?" ...
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1answer
4k views

Can I reduce MySQL memory usage, or do I need to add more RAM?

I have a VPS with 2.25GB of RAM. MySQL is using 1.4GB with only four users on my site right now. It seems to use this amount even when no users are online. The available memory of my server regularly ...
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1answer
112 views

Recommendations for my.cnf on MySQL Replicant

I have replication environment running in a master-slave configuration. The replicant is doing all writes and doing selects only very rarely - and none in which high performance is a requirement. ...
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395 views

MySQL InnoDB Configuration with 60Gb of Memory

I'm running a large MySQL Database, in the range of 30Gb in size. The MySQL 5.5 server is running on a dedicated server with 60GB of RAM, with no other processes installed apart from monitoring tools, ...
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955 views

After mysql server restarts I cannot see my own database

By mistake I restarted MySQL server in Linux system. But MySQL server was unable to start. I renamed my.cnf to my_bak.cnf. After that MySQL server started. But I can not see my project database. I ...
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return my.conf values to sane levels (total memory footprint = 220GB)

I recently took over administration responsibilities for one of our databases. The existing my.cnf has some crazy values. I should mention that one table has 1.8 billion rows of mostly unneeded ...
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1answer
594 views

Tools for cnf management, generation? [closed]

Does anyone know of any good tools for cnf configuration management? It's often the case I have a group of machines that has a very similar config except for a few differences such as server id or ...
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41 views

Checking for replication options

I have a master/master setup with one DB in each. DB name and tables in one server are different from the other, and few 'user' tables are being replicated with the option replicate-do-table. (It's ...
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1answer
855 views

Upgrading to new cPanel Server with mySQL on SSD — What should I change in my.cnf?

I'm upgrading to a faster server with whm/cpanel and the mysql databases will be on a SSD. I've read a bit about not wanting any query cache and stuff like that, but as a novice, I've learned that ...
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1answer
261 views

How to configure my.cnf in 5.6.17?

On production server(linux machine mysql 5.6.17), I tried to find my.cnf to change the system variables, but my.cnf was not in /etc/my.cnf location. It was in usr/ directory. Also that file contains ...
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1answer
5k views

How can I set a default session sql_mode for a given user?

I want to have a default session sql_mode that is different from the global sql_mode. I can set it manually, but I'd like to do it automatically. I thought I could add it to .my.cnf, but that doesn'...
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1answer
3k views

MATCH AGAINST one character words returns empty rows with ft_min_word_len = 1

I've set ft_min_word_len = 1 to my.cnf file, also SHOW VARIABLES LIKE 'ft_min_word%' displays ft_min_word_len as 1. Then I've reloaded all database tables and it still doesn't search for one character ...
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1answer
3k views

mysql server is not starting [closed]

mysql server is not starting after modifying configurations key_buffer = 16M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 8 query_cache_size = 16M after ...
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72 views

amazon small instance mysql query too slow

I have mysql database with 1.5 millions records with 2 million categories records. when i do query on categories and city where clause it takes 304989 milliseconds. on localhost it too fast. i tried ...
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1answer
14k views

Good configuration for 2gb (my.cnf) [duplicate]

I'm little newbie in configuring mysql and i seek a good configuration for mysql i have one site in ajax with many query and very slowly with VPS Iam in kimsufi 2gb i run only mysql in vps not apache ...
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2answers
30k views

My.cnf with 64GB RAM

May the following my.cnf file be fine for a dedicated server with 64GB of RAM (on Debian)? I'm running just one website on the server and on high load data insert in some table takes centuries...it ...
9
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1answer
19k views

How do I make binlog-format=ROW the start up default in the /etc/my.cnf file?

I can run the query SET GLOBAL binlog_format = 'ROW' and it works for that session. How do I make this setting stick after stopping and restarting MySQL? NOTE: I am on version 5.5.19 of MySQL (...
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1answer
709 views

What does this mean - ~/.my.cnf

When I run $ mysqld --verbose --help | less I got information like Default options are read from the following files in the given order: /etc/mysql/my.cnf /etc/my.cnf ~/.my.cnf As per my ...
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1answer
745 views

Need help tuning my.cnf file

I need help tuning mysql. Currently it is using a lot of CPU. I dont find any query that last longer than 3 seconds in SHOW PROCESSLIST and there are only around 20-25 running most of the time. Still ...
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2k views

MySQL - Out of memory: Kill process 3046 (mysqld)

We run a MySQL (v5.6.17) dump backup every 4 hours, and today noticed: Apr 19 20:09:30 mysql1 kernel: Out of memory: Kill process 3046 (mysqld) score 970 or sacrifice child Apr 19 20:09:30 mysql1 ...
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1answer
6k views

Why “.my.cnf” file is empty?

I want to edit some of InnoDB variables ,I go to the .my.cnf which is located in home/.my.cnf I found the file just empty. And when I check SHOW VARIABLES in MySQL it gives me all the variables and ...
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2answers
324 views

optimal size of innodb buffer pool

I read a lot of optimal number of innodb_buffer_pool_size and people say it must be larger with 10% than the innodb tables size, what is 60M. Accordyngly this the optimal size of the buffer is about ...
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2answers
131 views

Strange issue regarding my.cnf

I'm getting a weird message from phpmyadmin saying: #2006 - MySQL server has gone away What I found online is that I should increase the size of max_allowed_packet witch should be in the my.conf ...
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2answers
22k views

How to set Innodb Buffer Pool Size [duplicate]

I have a database using innodb completely. Its now having a innodb_buffer_pool_size at 128MB. Which I know is very less for my user. But no matter what I do it won't change. I have added a value of ...
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3k views

MySQL: High sort_buffer_size setting value

Thing is I was getting plenty of 131104 20:10:36 [ERROR] /usr/sbin/mysqld: Sort aborted with 256M and rather erratic behaviour in my load test. Now at sort_buffer_size = 1024M ...
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1answer
2k views

my.cnf validation [closed]

We have moved our server from old 8 GB RAM Server to new 16 GB RAM server so that we could have better performance. The server is still consuming lot of MEMORY. The tables in the database are not ...
10
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2answers
15k views

MySQL 5.1 InnoDB Configuration / 24GB RAM - bi-xeon high load

i'm running a facebook app which currently has 300 - 600 concurrent users (and growing). To get the hardware ready for growing i changed my i7 / 12gb ram / 2x 80gb intel x25 ssd's (debian 5.0 / mysql ...
3
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1answer
17k views

What is wrong with table_cache hit rate?

In my.cnf I have: table_cache = 524288 open_files_limit = 65535 Both are at max allowed value for mysql config. Both are less than max open file limit: # cat /proc/sys/fs/file-max ...
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2answers
317 views

MySQL Logging Options

I want to know what logging options are available to me in MySQL; I find a lot more results about binary logging than I do about general/error logging and I'm not sure what options are available to me ...
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1answer
2k views

MySql - set my.cnf location at server start

I want to have two MySql servers running on the same system (for master-slave replication tests purposes). To be able to do this I need both servers read different my.cnf files. As I see at startup ...
5
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1answer
1k views

Installing and enabling both master and slave semisynchronous plugins on same server

I want to run a semisynchronous replication setup, and for simplicity I'd like to not have to INSTALL and UNINSTALL plugins when a slave is promoted to a master. So I'm wondering if I'll experience ...
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815 views

InnoDB errors after having deleted “ibdata1”

By accident, I have deleted the ibdata1 file in the MySQL directory because MySQL wasn't functioning correctly. After reading so many forums, I found a post that recommended deleting the 3 files ...