Hi all,I just recently upgraded to Ubuntu 9.10, but now I'm having all sorts of temp file problems. For example, when I try to delete a row and violate a contraint I get:
ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails (temp file operation failed)
Instead of telling me which constraint is violated, it tells me the temp file creation failed. I have no reason why it failed, I don't see any error messages in the log.
To solve this problem I tried to make a tmpfs partition (I thought, maybe somehow my using ext4 might be a problem):
mkdir /tmpfs mount -t tmpfs -o size=1g tmpfs /tmpfs mkdir /tmpfs/mysql chown mysql:mysql and changed the tmpdir in the mysql config to /tmpfs/mysql tmpdir=/tmpfs/mysql But then mysql fails on startup:/usr/sbin/mysqld: Can't create/write to file '/tmpfs/mysql/ibGgjPv7' (Errcode: 13)
091108 10:12:46 InnoDB: Error: unable to create temporary file; errno: 13 091108 10:12:46 [ERROR] Plugin 'InnoDB' init function returned error.091108 10:12:46 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
I checked error code 13, which is permission denied, but I don't understand this, because if I change tmpdir to /tmp/mysql it does work, and I have:
$ ls -ld /tmp/mysql drwxr-xr-x 2 mysql mysql 4096 2009-11-08 10:14 /tmp/mysql $ ls -ld /tmpfs/mysql drwxr-xr-x 2 mysql mysql 40 2009-11-08 10:12 /tmpfs/mysql So I don't see the difference.... Has anyone encountered similar problems, or know what's going on here? Best regards, Sebastiaan
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