InnoDB: Error: space header page consists of zero bytes in data file ./ibdata1

Edit: copied my-innodb-heavy-4G.cnf to /etc/my.cnf.d and the server started fine. Probably caused by changing the binlog size.

It sounds like you changed the size of your InnoDB buffer, or it became corrupted. Possible that these changes were made some time ago and just took effect when you rebooted.

Definitely make a backup of your data in /var/lib/mysql first - preferably the entire directory.

cp -R /var/lib/mysql /var/lib/mysql-backup

With your data backed up, the best first step is to revert any changes that you made to the /etc/my.cnf file and restart.

If that doesn't do it, or you don't know what the size of your buffer used to be, the next possible option is to delete the InnoDB binlog files and let MariaDB/MySQL recreate them. The files are named /var/lib/mysql/ib_logfile{N} where {N} is a number.

rm -rf /var/lib/mysql/ib_logfile*

If that doesn't solve the problem try adding the following to your /etc/my.cnf (or whichever config file you use, backup first of course). It should go in the [innodb] section.

innodb_buffer_pool_size        = 256Minnodb_log_file_size           = 256Minnodb_thread_concurrency      = 16innodb_flush_log_at_trx_commit = 2innodb_flush_method            = normal

The trick is knowing what MariaDB is expecting. If you don't have success with the above try just the last line and set [innodb_flush_method].

If you encountered this problem when you installed MySQL initially, just remove ibdata and ib_logfile* files in your MySQL data directory, and then start MySQL again.

Good Luck!