MariaDB is an open source RDBMS that is designed to be a "drop-in" replacement for MySQL.

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Hi disk I/O and crash when turning on sync_binlog in MySQL

I have a MySQL master server (MariaDB 10.0.17) that have a very odd behavior. It has one slave fetching data from it. When I set global sync_binlog = 1, the server I/O goes very high and after some ...
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232 views

Could not start mysql or MariaDB. Permissions were ok, but mysql-bin.index permission error

Using MariaDB 5.5.36. Here's what I got while trying to start MariaDB: # syslog Dec 14 09:40:52 vps1497 mysqld_safe: Starting mysqld daemon with databases from /var/lib/mysql Dec 14 09:40:52 vps1497 ...
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1answer
24 views

Change MariaDB 10.0.17 (MySQL) master to a slave

I have a MySQL master/slave configuration -------- -------- | master | -> | slave1 | -------- -------- I want to kill my current master, transform slave1 to be the new ...
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1answer
336 views

MariaDB Galera Cluster - nodes fail to start

This is a new installation (fresh VM and MariaDB install). For some reason, the nodes are having trouble joining the master server. The master server would pause at Preparing binlog files for ...
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35 views

MySQL replication: most important config parameters on slave for performance on master server?

This query is almost the same as this question. But in this case, a configuration to make the master perform faster or just the same. Case We have a Master-Slave setup on a Mysql 5.0.77 - MariaDB ...
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1answer
17 views

mariadb / mysql wont change table_cache / table_open_cache

I've configured my i7 64gb ssd server with centos7 with the following my.cnf [mysqld] key_buffer = 12M max_allowed_packet = 16M table_cache = 4096 table_open_cache = 4096 table_definition_cache = ...
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1answer
25 views

Error connecting to 10.0.17-MariaDB-1~trusty

I'm having problem connecting remotely to my MariaDB server. I've tried more or less everything, and can open a socket with nc(nc myserver 3307) but with the mysql (mariadb) client I only get the ...
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1answer
1k 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. I already installed the ...
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17 views

MySQL replication error: Table doesn't exist

I just run a MySQL database master-slave replication using these instructions. The process seemed to be ok, but when I run some queries on the slave server I get this message on 3 of my tables. ...
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1answer
38 views

Complex query performance in MySQL InnoDB versus MyISAM

I am running on MariaDB 10.0.15 on a 4GB RAM cloud server with Local SSD disk for database. My model: users <n---n> right_holders <n---n> tracks ---n> raw_detections I have this ...
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1answer
153 views

How to set delayed replication with MariaDB 10.0.11

Is it possible to set delayed replication on MariaDB 10.0.11? I tried the following command: CHANGE MASTER TO MASTER_DELAY = N; It returns the following error: You have an error in your SQL ...
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1answer
92 views

Update old database with SQL dump

I had to recover a database with a some months old full backup. I have however in my possession a most recent but unfortunately incomplete SQL dump for this same database done with mysqldump. Is ...
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1answer
314 views

ERROR 1226 (42000): User 'root' has exceeded the 'max_user_connections' resource (current value: -1)

I'm using mariadb and have error ERROR 1226 (42000): User 'root' has exceeded the 'max_user_connections' resource (current value: -1) I'm set max_connection to 1000 and not set max_user_connections ...
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2answers
219 views

MySQL/MariaDB Limitations

we're running MariaDB on our DB server. We have to install multiple databases on each DB instance (in fact each DB server runs multiple MariaDB instances) because each database must be separated. ...
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1answer
67 views

Mariadb Galera Cluster using Xtradb backup is not working

I am trying out the first test of MariaDB Galera cluster setup without success. This is the error in the log innobackupex: Created backup directory /tmp tar: -: Cannot write: Broken pipe tar: Error ...
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1answer
45 views

MariaDB I/O capacity with innodb_io_capacity parameter

I use hdparm to test my SSD hard drive I/O benchmark : [root@mail ~]# hdparm -t -T /dev/xvda2 /dev/xvda2: Timing cached reads: 12906 MB in 1.99 seconds = 6477.79 MB/sec Timing buffered disk ...
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2answers
131 views

MySQL - prevent OS cache for query

On high load production server I have many sql selects which are unique or re-use will be in hours. I use SQL_NO_CACHE but this queries are still cached with OS cache. Server have 64G ram and used ram ...
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1answer
607 views

How to start mysqld with read-only data directory?

I'm trying to start MariaDB in a docker container, using a data directory from the host mounted read-only. MySQLd is of course shut down on the host. Unfortunately, even with adding the read_only flag ...
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45 views

MySQL SSL using MariaDB JDBC Driver

We have the following setup: Ec2 instance running a jboss server with mariadb (1.1.7) datasources setup to connect to an rds instance running MySQL 5.6.21. We would like to turn on SSL on for this ...
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1answer
129 views

mysql innodb_buffer_pool_size let me understand

I couldn't find answer for my situation. I have a windows server 2008 with 2 cores and 7 GB RAM (Azure D1 VM). I'm running mariadb 10.0.14 on it. I have 2 databases (1.5GB and 9GB in size). ...
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1answer
94 views

Install MariaDB 10 Generic Binaries + TokuDB

I used to install MariaDB from Generic Binaries on a Debian Wheezy 64bits: mariadb-10.0.13-linux-x86_64.tar.gz (from downloads.mariadb.org) I would like to use TokuDB as Storage Engine. However, ...
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1answer
305 views

Does MariaDB-Galera Cluster support LAST_INSERT_ID and mysql_info?

As far as I understand, Galera does not support table locking, but what information can be retrieved about the last query? LOCK/UNLOCK TABLES cannot be supported in master-master replication. Lock ...
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24 views

How can I make a copy of a table from information_schema?

I would like to extract meta information from information_schema like count of rows in a table and store the result table into "meta" database. However, while I can query tables in information_schema, ...
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2answers
1k views

Install MariaDB without password prompt in Ubuntu

I need to install MariaDB server in Ubuntu without password prompt. For this purpose, I execute the following commands, but it doesn't gave me any progress. It again shows password prompt. I used the ...
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1answer
291 views

MariaDB Cluster - data consistency for updates and auto_increment

I have two different MariaDB servers and plan to merge data into one database and create MariaDB Cluster with 3 nodes. I read about Galera and multi-master replication - which MariaDB Cluster use and ...
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2answers
27 views

Master/Slave desyncronisation

Some manual operations (writes) have been made on SLAVE instead of MASTER resulting in the replication being stopped. Could not execute Delete_rows_v1 event on table xxx.newsletter; Can't find ...
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2answers
27 views

Force MariaDB Galera to only create InnoDB tables

I successfully run a cluster of 3 DB servers using MariaDB Galera 10.0.16. This setup handels a couple of web apps we have created, plus a dozen medium traffic Joomla websites. My problem is that ...
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1answer
110 views

Speeding up a simple select query on Mariadb

I have a 100k rows table with the following structure: +----------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | ...
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1answer
28 views

PHP / MYSQL connection failures via socket under moderate load

I've done quite a bit of reading before asking this, so let me preface by saying I am not running out of connections, or memory, or cpu, and from what I can tell, I am not running out of file ...
2
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1answer
32 views

How should a numeric value that is an external key be stored?

This is something I was pondering recently. trying to determine how to store certain values. The best wide spread example I can think of is Federal Employee Identification Number - more commonly knows ...
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24 views

Can mariaDB contain indices only with data coming from remote tables?

I'm trying to think through a setup with a central mariaDB instance (A) accessing data on physically remote servers (B). All queries to the database (A) can be answered from indices only. Indices are ...
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1answer
19 views

Query error int/varchar LEFTJOIN [closed]

Can someone tell me what´s wrong with this query? $sql = "select bans.id as banid, bans.type, bans.data, bans.reason, bans.expire, bans.added_by, bans.added_date, players.id as playerid, ...
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2answers
780 views

To what extent is MariaDB Java client a perfect replacement for MySQL JDBC (Connector/J)?

Premise: I ship a Java application which will make a JDBC connection to a MySQL database. (At the time of this writing it could be 5.1 or 5.5, but hopefully the question and answer don't rely heavily ...
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1answer
511 views

MySQL (or MariaDB) multi-master without MMM

I've been reading blogs on MySQL multi-master setup. The way I've used MySQL replication in the past was master-slave where if the master died (or was being taken down for maintenance) we would shut ...
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24 views

What are the important notes when upgrade mariadb galera cluster from 10.0.14 to 10.0.16

I have a plan to upgrade mariadb galera cluster 10.0.14 to 10.0.16 Detail plan: I will do rolling upgrade (one by one) Step 1: Forward all queries to one node and stop other node (Node will be ...
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1answer
15 views

When you use a replica to backup from so you don't have to turn off the master, is this considered High Availablity?

I read somewhere that MySQL can have a master / slave setup in which the master database can continue to run live and in production while the slave database can be turned off to snatch a backup. And ...
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1answer
43 views

What can I do about this MariaDB 10.0 error?

I have a serious error that crashes the mariadb service, and it won't start up again until I delete the database folder in the data directory of the database I was working on at the time. Here is the ...
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1answer
117 views

What's the advantage of thread pool in MySQL/MariaDB?

MariaDB thread pool MySQL thread pool I've read official document of MySQL/MariaDB thread pool,but I'm still confused about it; As I understand, thread pool has two advantages: 1. limit too many ...
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23 views

Master slave replcaition from AWS MySQL 5.6 RDS to MariaDB 10 using multisource replication

Does anybody have any success on setting up multisource or regular master slave replication from AWS RDS 5.6 to MariaDB 10? I can see that binary logs and positions are changing, but no new data. ...
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0answers
52 views

MySQL 5.6 and MariaDB extremely slow

I have MariaDB 10.0.15 and MySQL 5.6.0 (compiled and running on different port) on my server (Debian Wheezy). I have also MySQL 5.5 installed. I have tried import of large database, but I have found ...
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1answer
24 views

Modify a value inside of a nested dynamic column

In the table (items), I have a dynamic column (attr). I have a very simple nested dynamic column. INSERT INTO items (attr) VALUES (COLUMN_CREATE('level1', COLUMN_CREATE('level2','level2_value'))); ...
0
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1answer
87 views

Setting up MariaDB Spider HA

I try to setup High Availability using Spider Engine and MariaDB 10.0.14, but I a m not sure what configuration to use to make it work as expected. What I want is: Accessing a remote table using ...
1
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1answer
26 views

How to transition from a statement based log to row based log for Galera replication?

I'm new to clustering and I'm trying to implement a Galera cluster. I'm transitioning from a standalone MySQL instance to a MariaDB Galera Cluster consisting of (at the moment) 2 nodes. I have ...
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2answers
69 views

Invision Power Board 3.4.6 - mysql locks during query with pending updates

about 2 weeks ago, we started experiencing random lockups and slowdowns on our forums. We've been running this site for around 6 years minimum with no issues. the site and db are on dedicated vms. The ...
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1answer
39 views

How do you use COLUMN_JSON with COLUMN_GET on dynamic columns in MariaDB?

When I do the following query; SELECT name, COLUMN_GET(attr, 'appearance' as char) as 'attributes' from items; I see the 2 columns including the blob data with the weird formatting. Is it ...
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0answers
42 views

54M InnoDB keeps shutting down unexpectedly [duplicate]

I have a mariadb server running several databases with very small load. From time to time, when I have 20+ users browsing one of the wordpress websites i have, the daemon just shuts down with the ...
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2answers
69 views

How can I perform this database backup/sanitization task?

I have a 3-node MariaDB/Galera cluster. I need to do two things: Back up the database regularly (multiple gigs in size) for a normal, in-case-everything-crashes-I-can-restore-from-this backup. Have ...
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0answers
10 views

Mysql keep shutdown after few restart on fresh Centos installation [duplicate]

I have restart a few times - systemctl stop mysql and systemctl start mysql on my Centos 7. After some time, all my application on this machine will face this error SQLSTATE[HY000] [2002] Can't ...
1
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1answer
66 views

Cannot add a column to an InnoDB table in Mariadb

I have this InnoDB table with less than 10 rows in mysql 5.5.40-MariaDB on Linux (x86_64). +-----------------+--------------+------+-----+-------------------+----------------+ | Field | ...
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168 views

Mariadb on Centos 7 not changing max connections based on my.cnf

The following configuration in my.cnf is not being followed. Max_connections go back to 151. please help as i have 16gb of dedicated ram that i would like to use properly. [mysqld] ...