MySQL Crashing -512MB Droplet + Sentora -Support Barracuda file format

Question

Hi everyoneI have a droplet with 512MB RAM and Ubuntu 16. I am runinng Sentora control panel. After install worpress I notice that MySql start to stop regularity. Then I try to solve this reducing the buffer pool size to 32MB but MySQL steel crashing. In the log I find something about Barracuda file format. I need a solucion. Here is a log error. 170502 7:38:13 [Warning] Using unique option prefix myisam-recover instead of myisam-recover-options is deprecated and will be removed in a future release. Please use the full name instead.170502 7:38:13 [Note] Plugin ‘FEDERATED’ is disabled.170502 7:38:13 InnoDB: The InnoDB memory heap is disabled170502 7:38:13 InnoDB: Mutexes and rw_locks use GCC atomic builtins170502 7:38:13 InnoDB: Compressed tables use zlib 1.2.8170502 7:38:13 InnoDB: Using Linux native AIO170502 7:38:13 InnoDB: Initializing buffer pool, size = 32.0M170502 7:38:13 InnoDB: Completed initialization of buffer pool170502 7:38:13 InnoDB: highest supported file format is Barracuda.InnoDB: The log sequence number in ibdata files does not matchInnoDB: the log sequence number in the ib_logfiles!170502 7:38:13 InnoDB: Database was not shut down normally!InnoDB: Starting crash recovery.InnoDB: Reading tablespace information from the .ibd files…InnoDB: Restoring possible half-written data pages from the doublewriteInnoDB: buffer…170502 7:38:13 InnoDB: Waiting for the background threads to start170502 7:38:14 InnoDB: 5.5.54 started; log sequence number 577003798170502 7:38:14 [Note] Server hostname (bind-address): ‘127.0.0.1’; port: 3306170502 7:38:14 [Note] - ‘127.0.0.1’ resolves to ‘127.0.0.1’;170502 7:38:14 [Note] Server socket created on IP: ‘127.0.0.1’.170502 7:38:14 [Note] Event Scheduler: Loaded 0 events170502 7:38:14 [Note] /usr/sbin/mysqld: ready for connections.Version: ‘5.5.54-0ubuntu0.14.04.1’ socket: ‘/var/run/mysqld/mysqld.sock’ port: 3306 (Ubuntu)

Jonathan Tittle · Accepted Answer

@elpapoelg

MySQL is most likely crashing due to insufficient RAM. 512MB isn’t much when you’re running both a control panel and full stack (Apache or NGINX, MySQL or MariaDB, PHP, etc).

When it comes to control panels, I normally recommend at least 1GB of RAM, though 2GB is ideal as you need RAM not only for the services you’re running, but any processes that the control panel runs, as well as for your site.

alexdo · Answer

Hello there,

What you could do is use the MySQLTuner script.

The MySQLTuner is a script written in Perl and allows you to quickly test your MySQL configuration and it gives you suggestions for adjustments to increase performance and stability.

According to the official GitHub page, it supports 300 indicators for MySQL/MariaDB/Percona Server in this last version.

To run the script you could do the following:

SSH to your Droplet
Download the script:

wget http://mysqltuner.pl/ -O mysqltuner.pl

Then execute it:

perl mysqltuner.pl

The script would run multiple checks against your MySQL instance, all checks done by MySQLTuner are documented here.

Also as stated in the official documentation, it is still extremely important for you to fully understand each change you make to a MySQL database server. If you don’t understand portions of the script’s output, or if you don’t understand the recommendations, you should consult a knowledgeable DBA or system administrator that you trust.

As a good practice make sure to always test your changes on staging environments before implementing them on your production database.

On the same note, if you want to have a worry-free MySQL hosting and focus on your application, I would recommend trying out the DigitalOcean Managed Databases:

https://www.digitalocean.com/products/managed-databases-mysql/

Hope that this helps! Regards, Alex

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MySQL Crashing -512MB Droplet + Sentora -Support Barracuda file format

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