Comments on: Experiment: MySQL tmpdir on tmpfs http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs About MySQL, Drizzle, MariaDB and more! Wed, 13 Jan 2010 12:40:20 +0000 http://wordpress.org/?v=2.8 hourly 1 By: krteQ http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1501 krteQ Mon, 15 Jun 2009 13:39:04 +0000 http://openquery.com/blog/?p=767#comment-1501 We have used this solution for a while on 5.0.67, but we came across many errors caused by missing temporary innodb tables after a crash. I think there were some bugs in the server code, but are resolved at now. Just be aware of 5.0.45, it doesn't respect the tmp_dir option :) We have used this solution for a while on 5.0.67, but we came across many errors caused by missing temporary innodb tables after a crash. I think there were some bugs in the server code, but are resolved at now.

Just be aware of 5.0.45, it doesn’t respect the tmp_dir option :)

]]> By: Daniel van Eeden http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1499 Daniel van Eeden Mon, 15 Jun 2009 12:45:22 +0000 http://openquery.com/blog/?p=767#comment-1499 This is like the default /tmp settings on solaris. On most Solaris systems /tmp is using a memory backend. That's why there is also a /var/tmp (which is reboot safe) This is like the default /tmp settings on solaris. On most Solaris systems /tmp is using a memory backend. That’s why there is also a /var/tmp (which is reboot safe)

]]> By: arjen http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1496 arjen Sat, 13 Jun 2009 23:57:54 +0000 http://openquery.com/blog/?p=767#comment-1496 @wultsch ALTER shouldn't use tmpdir, it'll create a new table under a temporary name in the target engine; otherwise you'd potentially get into rename-across-filesystem-boundries issues. @wultsch ALTER shouldn’t use tmpdir, it’ll create a new table under a temporary name in the target engine; otherwise you’d potentially get into rename-across-filesystem-boundries issues.

]]> By: Robert Wultsch http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1494 Robert Wultsch Sat, 13 Jun 2009 23:40:43 +0000 http://openquery.com/blog/?p=767#comment-1494 Be sure to make it large enough so that you don't run out of space doing an alter. MiniWheatFS is a very interesting project. Be sure to make it large enough so that you don’t run out of space doing an alter. MiniWheatFS is a very interesting project.

]]> By: arjen http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1493 arjen Sat, 13 Jun 2009 23:14:27 +0000 http://openquery.com/blog/?p=767#comment-1493 @Henrik haha yea ((I think it was Yves not Matt), much simpler. @Henrik haha yea ((I think it was Yves not Matt), much simpler.

]]> By: Erik Ljungstrom http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1492 Erik Ljungstrom Sat, 13 Jun 2009 21:38:47 +0000 http://openquery.com/blog/?p=767#comment-1492 We've had this implemented on quite a few production servers as well, it's performing very well and I've yet to spot any problems with it. Thanks to one of the many pesky drupal modules for forcing me to look into this in the first place! We’ve had this implemented on quite a few production servers as well, it’s performing very well and I’ve yet to spot any problems with it. Thanks to one of the many pesky drupal modules for forcing me to look into this in the first place!

]]> By: Henrik Ingo http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1490 Henrik Ingo Sat, 13 Jun 2009 19:58:57 +0000 http://openquery.com/blog/?p=767#comment-1490 Interesting. Seems similar but simpler to what Mat BigDBAHead was playing with some time ago: http://www.bigdbahead.com/?p=204 Interesting. Seems similar but simpler to what Mat BigDBAHead was playing with some time ago: http://www.bigdbahead.com/?p=204

]]> By: Volcane http://openquery.com/blog/experiment-mysql-tmpdir-on-tmpfs/comment-page-1#comment-1487 Volcane Sat, 13 Jun 2009 13:55:59 +0000 http://openquery.com/blog/?p=767#comment-1487 Have run servers like this for ages, if you have spare RAM and your workload is such that it wont be better used as query caches etc, then this can be a big win. Have run servers like this for ages, if you have spare RAM and your workload is such that it wont be better used as query caches etc, then this can be a big win.

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