For mysql Ver 14.14 Distrib 5.6.33, for Linux (x86_64) using EditLine wrapper
tmpdir = /var/mysql_tmpfs
/var/mysql_tmpfs/ rw, /var/mysql_tmpfs/* rw,
Permissions for folder:
drwxrwxrwt 2 mysql mysql 4096 Nov 28 19:46 mysql_tmpfs
Which, looks right to me. However, it is failing. Right now, mysql will start. However, when I load certain pages of my application, this is the error message that I see:
2016-11-28 20:23:41 39465 [ERROR] InnoDB: Unable to lock /var/mysql_tmpfs/#sql9a29_2_0.ibd, error: 13 2016-11-28 20:23:41 39465 [Note] InnoDB: Check that you do not already have another mysqld process using the same InnoDB data or log files. 2016-11-28 20:23:41 7fd2105d3700 InnoDB: Operating system error number 13 in a file operation. InnoDB: The error means mysqld does not have the access rights to InnoDB: the directory. 2016-11-28 20:23:41 39465 [ERROR] InnoDB: Cannot create file '/var/mysql_tmpfs/#sql9a29_2_0.ibd'
However, I do not believe there is another process running. When I do a ps aux | grep mysqld, I get this:
mysql 38943 0.0 0.0 4396 736 pts/4 S 20:21 0:00 /bin/sh /usr/bin/mysqld_safe mysql 39465 10.0 4.0 73330944 5301532 pts/4 Sl 20:21 0:16 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --log-error=/var/log/mysql/error.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/run/mysqld/mysqld.sock --port=3306
In addition, I was able to create a file in that directory as the mysql user, which is why I'm extra sure that the user should have the required permissions.
I'm guessing this is something that I'm missing, but I've now had three other people take a look and we have not gotten anywhere. Please help.