On Wed, May 16, 2018 at 01:53:37AM +0000, Lofgren, Eric wrote:

> Having failed to fix the ugly partition system, we???re going for reconfiguring mysql to make it elsewhere. I followed this post to try to get the temporary directory to point to another partition: https://encylia.com/2015/02/06/how-to-change-the-mysql-tmp-location-on-centos/ by doing all of the following under sudo:
> 
> mkdir /home/mysqltmp
> chmod 1777 /home/mysqltmp

Maybe instead of the chmod, just make the dir owned by the mysql user:

  chown mysql.mysql /home/mysqltmp

Or check if selinux is enabled and is preventing writing to that directory.

  getenforce
  grep mysqltmp /var/log/audit/audit.log

Paddy


> nano /etc/my.cnf
> 
> Add below line under the [mysqld] section and save the file:
> tmpdir=/home/mysqltmp
> 
> systemctl restart mysqld
> 
> This restart fails. If I restore the old my.cnf without the change, it works perfectly. Checking the log, it seems there???s a permissions issue:
> 
> 2018-05-16T00:01:05.211853Z 0 [Note] /usr/sbin/mysqld (mysqld 5.7.22) starting as process 5929 ...
> 2018-05-16T00:01:05.214159Z 0 [Note] InnoDB: PUNCH HOLE support available
> 2018-05-16T00:01:05.214186Z 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
> 2018-05-16T00:01:05.214191Z 0 [Note] InnoDB: Uses event mutexes
> 2018-05-16T00:01:05.214194Z 0 [Note] InnoDB: GCC builtin __atomic_thread_fence() is used for memory barrier
> 2018-05-16T00:01:05.214197Z 0 [Note] InnoDB: Compressed tables use zlib 1.2.3
> 2018-05-16T00:01:05.214202Z 0 [Note] InnoDB: Using Linux native AIO
> 2018-05-16T00:01:05.214382Z 0 [Note] InnoDB: Number of pools: 1
> 2018-05-16T00:01:05.214459Z 0 [Note] InnoDB: Using CPU crc32 instructions
> mysqld: Can't create/write to file '/home/mysqltmp/ibAcknwl' (Errcode: 13 - Permission denied)
> 2018-05-16T00:01:05.214535Z 0 [ERROR] InnoDB: Unable to create temporary file; errno: 13
> 2018-05-16T00:01:05.214542Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
> 2018-05-16T00:01:05.214548Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
> 2018-05-16T00:01:05.214551Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
> 2018-05-16T00:01:05.214554Z 0 [ERROR] Failed to initialize builtin plugins.
> 2018-05-16T00:01:05.214557Z 0 [ERROR] Aborting
> 
> Any clues as to what I???ve done wrong?
> 
> Thanks,
> Eric
> 
> > On May 15, 2018, at 12:07 AM, Steven Haigh <[log in to unmask]> wrote:
> > 
> > Your ibtmp1 file will be written to /var/lib/mysql/ by default. That's on a partition that is full.
> > 
> > Either reconfigure mysql to create this elsewhere, or fix the ugly partition system :)
> > 
> > -- 
> > Steven Haigh
> > 
> > ? [log in to unmask]     ? https://urldefense.proofpoint.com/v2/url?u=https-3A__www.crc.id.au&d=DwIDaQ&c=C3yme8gMkxg_ihJNXS06ZyWk4EJm8LdrrvxQb-Je7sw&r=iUZ75NAR4hD2qziTurU89Tw8MeGe3cJQ6SpQAafuVT0&m=ziwKCJsn_tIEWNg9SSZnfZ62b3McsLUsMRm2PeXqh38&s=kCcOkUUIK1h2Ys9iKe-Z-bm0dQqcRyaBKpJPoZX5OXM&e=
> > ? +61 (3) 9001 6090    ? 0412 935 897
> 



-- 
Paddy Doyle
Trinity Centre for High Performance Computing,
Lloyd Building, Trinity College Dublin, Dublin 2, Ireland.
Phone: +353-1-896-3725
http://www.tchpc.tcd.ie/