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

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Galera and in-memory

i've got a question about Galera cluster + mysql/mariadb and RAM. Basically, mysql cluster needs to run in-memory (https://dev.mysql.com/doc/refman/5.1/en/mysql-cluster-basics.html). But we have a 3 ...
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300 views

Incremental backup in mariaDB mysql

I am using 5.5.41-MariaDB and ENGINE is MyISAM on CentOS 7. Please help me for Incremental backup command of mariaDB mysql on CentOS 7.
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1answer
73 views

Running Triggers on Slave with Row-based Events in MySQL >=5.6

We would like to have a setup where a slave has triggers that are not present on the master for the purpose of updating some summary tables or run a specific udfs.sys If one uses statement-based ...
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1answer
318 views

Mysql (mariadb 10.1.5) update against subquery

I have a list of users that I need to do an update against. select sp.name from syndicate_store2.store_players as sp, syndicate_ipb.nexus_purchases as np left join syndicate_ipb.members as mem ...
3
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1answer
243 views

Update columns values using select from external database and table in MariaDB trigger

I have two databases pdone and veevan. pdone is a kind of master and veevan keep on continue sync against an external sources. I need to perform a internal sync between veevan and pdone so I am using ...
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1answer
125 views

How to update row values with values from SELECT into another DB in a trigger

I have been working in a trigger for INSERT|UPDATE values for a given record based on same PK. What trigger basically should do it is, foreach row when some INSERT happens on veeva_new.account: ...
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0answers
88 views

Problem Setting up MariaDB Spider HA

I have problem setting MariaDB with Spider for partitioning and HA.My environment consists of: Spider Proxy - 10.64.20.207 Backend1 - 10.64.20.208 Backend2 - 10.64.20.209 First I am creating user ...
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72 views

MySQL and MariaDB [closed]

Why biggies such as Google are leaving MySQL and going to MariaDB? I'm only trying to understand the technical reason or business reason behind this? How much hold does MySQL has presently on the ...
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2answers
1k views

Add UNIQUE index fails with duplicate entry error, but no duplicates found

Given table: CREATE TABLE mytable ( field_a CHAR(15) NOT NULL DEFAULT '', field_b MEDIUMINT UNSIGNED NOT NULL DEFAULT 0, field_c SMALLINT UNSIGNED NOT NULL DEFAULT 0, field_d SMALLINT ...
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1answer
32 views

Update reps table with right values in a trigger after insert on userterritory

I two DBs veeva and pdone as shown below in the pics As you can see veeva is simple and hasn't no constraints which relies on duplicate and wrong values. The problem happen exactly on ...
2
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1answer
381 views

MariaDB 10 InnoDB Partition with Data Directory

mysql --version mysql Ver 15.1 Distrib 10.0.20-MariaDB, for Linux (x86_64) using readline 5.1 I have a MariaDB 10 installed, though I tried with the 5.5 release in the CentOS repos. I'm ...
3
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1answer
264 views

Introduce delay between master slave setup in MariaDB

We're using a master-slave solution using MariaDB 5.5.44. Is there a way to manually introduce a delay between the master and slave? I'm thinking of something like 1' or so. Is there a mysqld option ...
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1answer
26 views

Trigger is failing with no errors at all, why?

I need to UPDATE territory_id column at pdone.reps table by using and filtering results from veeva_new.userterritory so based on the answer I got here I am trying to build my own and this is how it ...
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2answers
2k views

Error: This version of MariaDB doesn't yet support 'multiple triggers with the same action time and event for one table

I'm trying to run this query in mysql Ver 15.1 Distrib 5.5.44-MariaDB, for Linux (x86_64) using readline 5.1 but got this error all the time: CREATE TRIGGER trig_companies_table_insert BEFORE INSERT ...
3
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2answers
121 views

Is it possible to backup stored routines and functions with Innobackupex?

I am running a few restore tests on my Dev and I've noticed that the stored routines are not being restored with the innobackupx. Is that something achievable ? Am I doing something wrong ? I am only ...
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0answers
154 views

Select SQL_Calc_Found_Rows query extremely slow

I'm Wordpress 4.2.2 on an Ubuntu 14.04 LTS server, with PHP 5.9x and MariaDB 10.0.17. When clicking on a post on my site I see many slow queries that all resemble this and it ends up taking as 8 or 9 ...
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0answers
248 views

How to create multiple mariaDB mysql instance in CentOS 7?

How to create multiple mariaDB mysql instance in CentOS 7? I have already installed first mariaDB mysql instance in CentOS 7. I've been searching for documentations on how to configure a Multi-Master ...
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1answer
34 views

MariaDB cluster and external data feed

I've just finished setting up the 3 nodes mariadb (galera) cluster (let's call the nodes node1, node2 and node3). In order to have the cluster up to date with currently working mariadb database (let's ...
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1answer
458 views

MariaDB Multi-source Replication SQL_SLAVE_SKIP_COUNTER

When an error occurs on a slave while executing a statement from the master, it is sometimes useful to use SQL_SLAVE_SKIP_COUNTER variable to skip the execution of the query, like this: STOP SLAVE; ...
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1answer
63 views

Will “bridge” storage engines work with MariaDB Galera Cluster?

Galera states that it only supports InnoDB. The reason is quite clear, and it is related with the way synchronous replication is implemented in Galera. However, some storage engines are just "bridges"...
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1answer
374 views

Galera, MariaDB and multiple datacenter

Looking into using Galera and MariaDB across 3 data centers. We have a metroE comnection between the sites. Connectivity is pretty stable, but my concern is if a WAN link goes down at one of the sites,...
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62 views

Mariadb support rtree index on innodb soon?

I was looking through mariadb bug list online (https://mariadb.atlassian.net/secure/RapidBoard.jspa?rapidView=24&projectKey=MDEV), but I am unfamiliar with JIRA so I am not sure exactly what I am ...
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1answer
140 views

Result occurs often with fast random select query

I have this query to display 4 random photos on a website (I have it from here (when I asked for something faster than ORDER BY RAND())): (SELECT `p1`.`id`, `p1`.`url`, `p1`.`hits`, `p1`.`...
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1answer
311 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
367 views

Debug why MySQL/mariadb table is crashing

I have a MyISAM table that keeps crashing. How would I figure out why it is crashing? The error messages say nothing other than that it crashed. Is there a log setting I could activate? This is ...
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2answers
936 views

ALTER TABLE … ROW_FORMAT=Compressed times out

I'm trying to change a table with the command: ALTER TABLE ... ROW_FORMAT=Compressed This fails after 15 minutes, the log says: InnoDB: Error: semaphore wait has lasted > 600 seconds InnoDB: We ...
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1answer
81 views

How to structure this data? (Many columns currently.)

Working in MariaDB, we're trying to figure out how to store this data. All of our other tables have been normalized and are working nicely, but this has me stumped. We have a number of objects and ...
0
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1answer
262 views

Non-Replicating commands from (master) Mysql 5.5.40 to (slave) MariaDB 10.0.19

CRUD replicates just fine. But we noticed that DB structure altering commands such as ALTER TABLE and/or adding/updating columns to a table and even creating new ones do not replicate to the slave at ...
1
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1answer
53 views

Seemingly simple query…excruciating response time

I am in the process of running what seems to be a simple query and have yet to receive a result set. The purpose of the query is to obtain a list of all records within a table that share the same ...
2
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2answers
133 views

INET6_ATON returns NULL for input parameter

I'm making a MySQL Stored Procedure which takes a string representation of an IPv4 or v6 address and converts it to binary using INET6_ATON. I know that my version of MySQL supports this function ...
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1answer
97 views

Why is MariaDB 10 refusing to use my index on a date field?

I have the following table definition: CREATE TABLE `bets` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `id_mp` bigint(20) NOT NULL DEFAULT '0', `coin` char(3) COLLATE utf8_unicode_ci NOT NULL, ...
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37 views

Need some help building a query to get info from several tables

I have this semi-complex table structure: And I need to return this data: { "id": "10111001", "rep_id": "30000001", "targets_id": "60011001", "brands_id": "10010001", "brand_name": "...
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1answer
244 views

Removing per column and table collation and charset

I recently completed a transition of a database from CHARSET=utf8 COLLATE=latin1 to CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci. During the process tables were migrated one at a time by altering their ...
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1answer
297 views

How to insert UNIQUE IDs values from several tables into events table

I have a table called events defined as follow: rep_id, hcp_id, brand_id, email_id and content_id is the IDs in other tables. event_type should be kind of array containing this values: [ "...
0
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1answer
51 views

Function for generate a huge and possible random relationship between tables

I have this two tables and N:M relationship between them: Let's said I am managed to create a lot of media and emails records but I need to create the relationship between them. I can do this ...
2
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2answers
379 views

Slow “CREATE TABLE” and “TRUNCATE” on MySQL / MariaDB

I am fighting with performance issues on a local MariaDB instance. Fun thing: I previously had problems with all my INSERT and UPDATE and DELETE queries. This got signigicantly faster (~40ms -> less ...
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1answer
69 views

Does MariaDB support schema changes inside a transaction?

MySQL doesn't support schema changes, inside a transaction so there's no way to roll back after during a failed migration involving schema changes. This capability is supported by Postgres and SQLite....
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1answer
120 views

How can I append new data from a particular mySQL table to an excel spreadsheet?

We have a database trigger that automatically adds new clients to a table when they first contact the server, it takes a number of unique identifiers that the client provides on first contact and ...
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0answers
881 views

MariaDB is ignoring /etc/my.cnf

The variable I am trying to change is innodb_buffer_pool_size. As you can see below the settings is 512M. But SELECT @@innodb_buffer_pool_size; returns 134217728. When I execute: /usr/libexec/mysqld -...
0
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1answer
80 views

MariaDB 10 replication strange behaviour

I have following MariaDB 10 replication setup. Server A MariaDB 10 (master), Server B MariaDB 10 (master), Server C MariaDB 10 (slave/master), Server D MariaDB 10 (slave). A and B are getting new ...
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2answers
140 views

Awful execution plans after migrating from MySQL 5.5.11 to MariaDB 5.5.41

We just migrated our web site database from a server running MySQL 5.5.11 to one running MariaDB 5.5.41. Everything is working mostly fine, except there's at least one query from our storefront that's ...
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2answers
5k views

How to enable queries logs in MariaDB

I'm running mysql Ver 15.1 Distrib 5.5.46-MariaDB in CentOS 6.7 server. I'm trying to get queries logged and I'm doing by redirecting log to files as shown below: #/etc/my.cnf.d/server.cnf # this is ...
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2answers
503 views

MariaDB/InnoDB: What to do on “Locks in Status-Log but no locked table found”

We migrated lately from MySQL to MariaDB. SELECT VERSION() 10.0.13-MariaDB-log When executing this: SHOW ENGINE INNODB STATUS I get (shortened): ... ---TRANSACTION 279257007, ACTIVE 23981 ...
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1answer
270 views

indexable JSON datatype in MySQL/MariaDB

In PostgreSQL 9.4 there is a JSONB datatype which allows you to index on fields in the stored JSON objects. Does MySQL/MariaDB have an equivalent? I'm specifically interested in the MariaDB Galera ...
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105 views

What happens when a mysql connection gets lost?

I hope this is a question for the dba board. Otherwise blame me and i'll switch to unix. imagine the following situation: you have a Mysql server S and two clients A and B. Both clients connect to S ...
4
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1answer
791 views

SELECT performance on MariaDB Galera cluster vs. MariaDB is terrible

We are evaluating a Galera setup and so far we have not noticed to many drawbacks except a few queries that have terrible READ performance I cannot put my finger on it. The query by itself isn't ...
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0answers
254 views

MySQL database table creation is very slow

I´ve run a test script that creates a database and 3 sample tables. Machine: Windows 7 x64 and MariaDB 10.0.17 DROP DATABASE IF EXISTS dbTest; CREATE DATABASE dbTest; USE dbTest; SET profiling = 1; ...
0
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1answer
53 views

InnoDB index concurrent inserts

I have an InnoDB table with an index on it. I have a few million rows to insert, so I thought I might take advantage of the row-level locking and do it in parallel. I'm inserting in batches of 10000, ...
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0answers
307 views

Help with Galera Cluster Auto_Increment

We're currently running a Galera cluster of 3 DB nodes. The way we're set up (due to ORM and automagical locking), we only have one of the 3 DB nodes being written to, and the other two provisioned ...
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2answers
3k views

mysql connection timeout on small traffic server

How can I set up MySQL so that connections never time out? And how do I even check to see what the current settings for variables such as wait_timeout and interactive_timeout, etc. are? Given that ...