All Questions
3,782 questions
0
votes
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17
views
Hangfire & MariaDB locking issue
There is a software hangfire that uses mysql/mariadb as the backend. When the hangfire database was dropped, some InnoDB tables were left undropped and locked in some unusual way.
hangfire_hash
...
- 4,581
0
votes
0
answers
56
views
Is this sql code susceptible to SQL injection?
I have a MariaDb/PHP application used for searching biological names (Latin/Swedish) from a large scientific database.
The only user textual input is to provide a (partial) name in a textfield, read ...
0
votes
3
answers
42
views
How to use mysqldump to transfer data to another server with a different database name
I have a production MySQL server and I want to copy everything to a development MySQL server (actually, I believe it is really MariaDB on the development side). Both servers are hosted (one Azure, the ...
- 101
-1
votes
0
answers
23
views
Migrating trigger from MariaDB to PostgreSQL [closed]
I'm doing a study for a possible migration from MariaDB to PostgreSQL. The database has 66 triggers. Is there any tool that can assist in migrating these triggers?
0
votes
0
answers
12
views
MariaDB-Backup: Failed To Validate First Page Of File: Error 40
Hoping someone can help with this:
I'm running a simple mariadb-backup --backup and I get the following error:
2024-12-12 16:38:35 mariabackup: Generating a list of tablespaces
2024-12-12 16:38:35 0 [...
- 1
0
votes
0
answers
17
views
mariadb: why does altering a table column from unsigned to signed int (or the reverse) require the COPY algorithm?
I have database table with a tens of millions of records. For some reason the auto increment id column is a signed int and I tried to change it to an unsigned int. Goes without saying but I checked ...
- 1
1
vote
0
answers
22
views
How can I mitigate or minimise this MariaDB deadlock?
I'm struggling with a deadlock in my booking web application when there are many concurrent users.
Here are the relevant tables:
mariadb> explain bookings;
+-----------------------+--------------+--...
- 161
2
votes
1
answer
33
views
Innodb - Can you safely ignore the warning "Memory size allocated for the temporary table is more than 20% of innodb_buffer_pool_size"
We get this warning in our online shop
report.WARNING: Memory size allocated for the temporary table is more
than 20% of innodb_buffer_pool_size. Please update
innodb_buffer_pool_size or decrease ...
- 125
0
votes
0
answers
23
views
What potential issues with MariaDB database converting from Latin1 to UTF-8
I have a MariaDB database that is set using latin1 but our PHP and HTML specify we are using UTF-8. This is causing some characters to be switched from ' to � and before I switch the database to UTF-8 ...
0
votes
2
answers
27
views
How to handle asynchronous slave synchronization with Galera?
I have a server with a service that uses mariadb database. This machine is remote and the database is far away in a Galera cluster of two servers.
Currently, this server is connected using an ssh ...
- 201
-1
votes
1
answer
21
views
Website Content Not Displaying Correctly in Vietnamese After Restoring Database from Backup [closed]
I used the Scheduled Backups feature in Virtualmin to back up my website. My hosting setup used the latest version of Virtualmin on a VPS running Ubuntu 22.04. Unfortunately, my VPS expired because I ...
- 1
0
votes
1
answer
32
views
Where can I find more detailed MySQL deadlock logs?
We have a MySQL database in AWS RDS that was migrated recently from 5.7 to 8. One of our microservices running in ECS executes bootstrapping code at launch to iterate through a large list of table ...
GS-Scooter
0
votes
0
answers
11
views
Can you downgrade provisioned iops on gp3 for postgresql RDS?
Doing an occasional analysis on a postgreSQL RDS instance with gp3 storage.
Running out of provisioned IOPS.
Is it possible to temporarily raise the provisioned IOPS limit? e.g. just for a day or ...
- 347
0
votes
0
answers
26
views
mariadb-backup consistently produces corrupt backups after 11.4 upgrade
We recently upgraded mariadb 10.3 to 11.4. Upgrade went surprisingly smoothly, but now backups taken using mariabackup are consistently corrupted.
We use mariabackup to create replicas using the ...
- 1
0
votes
1
answer
26
views
mariadb remote access issues
Hello all my name is 0xNosaj
I have a website I was given to control and move. It runs on PHP. I have only SSH access to it but I cannot seem to make the phpmyadmin site come up.
How I've tried ...
1
vote
1
answer
35
views
Illegal mix of collations
I am managing a MariaDB 10.6 Server for a bunch of people. I also dump the databases for backup purposes. Recently, one of the databases started to make problems while dumping:
mysqldump: Couldn't ...
- 111
2
votes
1
answer
279
views
Loading a CSV into mariadb errs out as "invalid date format"
I am trying to load CSV into a MariaDB .
Having issues in transforming date .
Here is an example file and two tables
( emp , where dob is declared as a date column and emp_varchar , where dob is ...
- 21
0
votes
1
answer
26
views
MariaDB Server Overloading
I have a docker host on which have multiple mariadb containers each for one application.
But I have one particular application, my main application which overload the server eachtime that I start it ...
- 101
0
votes
0
answers
15
views
Postrgresql Logical replication causing very high buildup of log files even though replication slots are active [ AWS RDS postgresql 16.1]
I have two rds instances and have set up logical replication between them [ publisher subscriber]. for the 3-4 days everything was working fine wal files were getting cleared but suddenly when the ...
- 1
0
votes
0
answers
25
views
MariaDB Spider Tuning
if I have a Spider database which has only Spider tables, what are important configuration keys for tuning the Spider ? For example, i heard about Spider and how it works with MEMORY table so should i ...
- 13
0
votes
1
answer
33
views
MariaDB - Is it safe to delete a large temporary file?
I am running MariaDB on a Windows Server 2022 Standard and I am running out of disk space on the system disk.
I have found a file named ib534F.tmp with 65 GB related to MariaDB in the path:
C:\Windows\...
- 3
0
votes
1
answer
31
views
Amazon Aurora RDS - invalid undo record
Context
Aurora RDS, MySQL 8.0.mysql_aurora.3.05.2
Problem
The writer instance is constantly cycling. In the AWS RDS console, under Logs & events for the writer, I see
Attempting to restart the ...
- 121
0
votes
0
answers
17
views
Connection hangs at password
Basic question: I want to connect 2 systems (A and B, on different networks) to a single mysql database. No problem with the 1st one, but the 2nd one hangs at the password:
A $ mariadb -v --protocol=...
- 101
0
votes
2
answers
51
views
Mysql process consumes High CPU & RAM even after reboot
My VPS on DO (1 shared CPU & 1 GB RAM) sometimes got high CPU & RAM, and sometimes I stopped MySQL services then restart then it becomes normally, but sometimes this way did not work
Today, I ...
0
votes
1
answer
67
views
MySQL Workbench error "name is not activatable"
I'm working with Arch Linux using MariaDB through LAMPP, whenever I use MySQL workbench and try to connect to my local database I get the following:
Your connection attempt failed for user 'root' to ...
0
votes
1
answer
42
views
Setting Synchronous_commit to off in Postgres in AWS RDS
0
We are experiencing significant delays in our PostgreSQL database due to LWLock:WALWrite and LWLock:WALSync waits, which are causing commits to pile up.
To address this, we have undertaken several ...
- 1
0
votes
0
answers
30
views
Client timeout connection in MySQL
I'm trying to limit the amount of time my MariaDB client will wait when trying to open a connection to the server. All my searches instead find only server-side limitations for timing out stale/...
- 101
0
votes
1
answer
59
views
High swap consumption during database backup with mariabackup
Hello
We are experiencing a swap consumption problem when backing up our database.
Every evening at 01am we run the mariabackup command and during the process swap usage rises sharply until it reaches ...
1
vote
0
answers
28
views
DB Link from Oracle 12c running on Solaris to MariaDb with dialog authentication method
I have Oracle 12c running on Solaris which is my main database for multiple systems and data processing. There is planned upgrade and migration from Solaris but this wont happen soon, my team is not ...
- 13
0
votes
1
answer
31
views
MariaDB Creating a Trigger does not work
I have a MariaDB 10.6 Server on a Rhel linux and I want to create a trigger for a table. This is my code:
DELIMITER //
CREATE TRIGGER before_salary_update
BEFORE UPDATE ON Employee
FOR EACH ROW
BEGIN
...
- 163
0
votes
0
answers
29
views
Issues with --extra-lsndir in MariaDB Incremental Backups Not Updating LSN as Expected
I'm automating both full and incremental backups for a MariaDB instance running in Kubernetes. However, I'm experiencing an issue where the LSN (Log Sequence Number) isn't updating as expected with ...
- 104
0
votes
1
answer
24
views
PHP script fast on local MariabDB 10.2.44 but significantly slower on remote MariabDB 10.5.22
I have a PHP 7.2 script which uses MySQLi to connect to a MariaDB database. On an older host running CentOS 7 and MariabDB 10.2.44, the script running locally completes in about 10 seconds. This is ...
- 101
0
votes
1
answer
24
views
How can I disable the MaxScale readwriterouter for specific queries?
I'm using a Galera replication and MaxScale readwriterouter.
I'm facing an issue because the application has been developed with this flow:
start transaction
update a record
commit
read that record
...
- 201
0
votes
0
answers
41
views
Cluster MariaDB Primary + Two Replicas orchestrated via MaxScale: how to recover from a major disruption?
I am working on a Mariadb cluster primary/replica handled via maxscale, to which I successfully added a third node. When I left things few days ago everything was fine. today I found that all nodes ...
- 1
0
votes
1
answer
58
views
mariadb error while setting undo tablespaces
version -- MariaDB 10.6.19
i'm learning maiadb administration, while learning about the tablespace management, I read that undo management is done in the system tablesapce. To have separate undo ...
user3338757
-1
votes
2
answers
37
views
Is it possible to compress or parition existing huge table in place for mariadb?
I have a mariadb database set up for logging experiment data. In one of the tables, I store huge raw images every row. With a few million rows each containing 3 512*512px images, I run out of disk ...
- 1
0
votes
2
answers
52
views
Optimal indexing for a big partitioned table
I used Rick James's partitioning and indexing guide to create this a couple of year ago but now after reading the tutorial again I am not so sure I understood it correct and that the below table is ...
2
votes
1
answer
19
views
JSON_CONTAINS in HAVING clause adds extra closing brace to JSON_OBJECTAGG
I have a table with data we've collected from various sources. It's got the item name, the source and the source's value.
The table looks like the following:
id
name
source
value
1
abc
web
1
2
abc
...
- 121
0
votes
0
answers
19
views
MariaDB Slave not updating from Master
No errors are reported but changes on the master, even after waiting over night are not showing up in the slave.
Suggestions greatly appreciated.
Master Server Version = 10.6.19-MariaDB-log
SHOW ...
0
votes
1
answer
32
views
Select query appearing to not use the most appropriate index
I have a table with approximately 80 columns. Several of these are indexed. These include age, shoesize and height - all are integers.
I then have a query that I am trying to optimise:
select * from ...
- 111
0
votes
1
answer
26
views
Analyzing sql query performance issues in mysql
I am new to mysql, I have few questions in regards to query performance tuning. (Note- its version 8.0.32)
I understand we use "explain analyze" to see the execution plan and it shows the ...
- 11
0
votes
0
answers
15
views
MariaDB Galera nodes rejoining but missing data after resync
I have 1 MariaDB Galera cluster composed of 5 nodes in 2 different datacenters: 3 in DC1, 2 in DC2, On DC1, one of the nodes has a pc.weight=2. Bootstrap was set on Node 1 from DC1.
Data between the 5 ...
- 1
0
votes
0
answers
13
views
Issue with MariaDB Master-Slave Cluster Failover in MaxScale When Multiple Pods Are Deleted
Issue with MariaDB Master-Slave Cluster Failover in MaxScale When Multiple Pods Are Deleted
Hello everyone,
I’m running a MariaDB master-slave-slave setup with MaxScale for automatic failover. The ...
- 104
0
votes
0
answers
22
views
Granting Permissions To as User in Mysql
I created user-a that has the following grant privileges
SHOW GRANTS FOR 'user-a'@'%';
'GRANT INSERT, UPDATE, DELETE, CREATE, DROP, RELOAD, PROCESS, REFERENCES, INDEX, ALTER, CREATE TEMPORARY TABLES, ...
0
votes
0
answers
15
views
MySQL 8.0 connecting to AWS RDS MySQL 5.7 with SSL/TLS CA authentication fails weirdly (Error code MY-002026)
When trying to establish TLS encrypted replication between a replication source living in AWS RDS on version 5.7.44, and a replica living in a VM on-premise on version 8.0.39, I keep getting an error:
...
- 1
0
votes
1
answer
68
views
MariaDB Galera and Geo redundancy
I am trying to simulate 2 clusters in different datacenters/different locations, using VMWare VSXi and 6 VMs: 3 are located on DC1 and other 3 on DC2. All nodes are RHEL 9.
Both DCs communicate ...
- 1
0
votes
0
answers
94
views
How does RDS Postgres OldestReplicationSlotLag metric correlate to replication slot Log Sequence Number lag?
We run a Postgres 14.9 database via RDS Aurora Serverless. We have a logical replication slot consumed by a service (Fivetran) every 15 minutes.
We noticed this behavior where the reported ...
- 51
0
votes
1
answer
32
views
Mysql : how to join 2 row different colum using same table?
I try to get output from 2 row in single row for attendance report, but i dont know how. please help me
Table : attendance
no
id
punch_in
punch_out
1
1
2024-10-04 08:00
2
2
2024-10-05 08:10
3
2
...
- 1
1
vote
1
answer
48
views
Collation difference in PostgreSQL on AWS RDS and local machine
I have an issue with collation in PostgreSQL when sorting a result set. We use AWS RDS PostgreSQL, and we want to sort query results in a specific way. Locally, everything works perfectly on my laptop ...
- 119
0
votes
0
answers
38
views
Login to mariadb via .cgi script denial
New forum user here so let me know if I do anything off protocol or use improper terms.
I'm migrating some perl scripts from a CentOS7 machine to Alma9 and of course mysql/mariadb is a more recent ...
