Re: Why is MySQL using /tmp?
If I understand the manual correctly, it uses /tmp for creating temporary tables if their size exceed the smaller of tmp_table_size or max_heap_table_size, otherwise, it will create the temporary table in memory. So if tmp_table_size is set to say 10Mb, and MySQL needs to create a temporary table internally (which it does need for sorting and other stuff) which would be about 20Mb, it's going to create it in /tmp. If that temporary table had been 5Mb, it would have created it in memory. I'm not sure how to calculate the needed space for /tmp. Check this for how to change the tmp directory location: http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html#sysvar_tmpdir Cheers, Amr On Thu, Jun 11, 2009 at 8:51 AM, Mike Spreitzer mspre...@us.ibm.com wrote: I find my MySQL Community Edition 5.1.34 server running out of space on /tmp (which is indeed small). Why is it using /tmp? How much free space do I need on /tmp? Can/should I make the server use a different location instead of /tmp? Thanks, Mike Spreitzer
Re: Why is MySQL using /tmp?
Yes it is used for temporary tables. You can also set the directory for temporary tables to some bigger partition. Cheers Claudio 2009/6/11 Amr Mostafa amr.most...@gmail.com If I understand the manual correctly, it uses /tmp for creating temporary tables if their size exceed the smaller of tmp_table_size or max_heap_table_size, otherwise, it will create the temporary table in memory. So if tmp_table_size is set to say 10Mb, and MySQL needs to create a temporary table internally (which it does need for sorting and other stuff) which would be about 20Mb, it's going to create it in /tmp. If that temporary table had been 5Mb, it would have created it in memory. I'm not sure how to calculate the needed space for /tmp. Check this for how to change the tmp directory location: http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html#sysvar_tmpdir Cheers, Amr On Thu, Jun 11, 2009 at 8:51 AM, Mike Spreitzer mspre...@us.ibm.com wrote: I find my MySQL Community Edition 5.1.34 server running out of space on /tmp (which is indeed small). Why is it using /tmp? How much free space do I need on /tmp? Can/should I make the server use a different location instead of /tmp? Thanks, Mike Spreitzer
Re: Why is MySQL using /tmp?
This might help: http://dev.mysql.com/doc/refman/5.1/en/temporary-files.html On Jun 11, 2009, at 12:51 AM, Mike Spreitzer wrote: I find my MySQL Community Edition 5.1.34 server running out of space on /tmp (which is indeed small). Why is it using /tmp? How much free space do I need on /tmp? Can/should I make the server use a different location instead of /tmp? Thanks, Mike Spreitzer -- Paul DuBois Sun Microsystems / MySQL Documentation Team Madison, Wisconsin, USA www.mysql.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Why is MySQL using /tmp?
I find my MySQL Community Edition 5.1.34 server running out of space on /tmp (which is indeed small). Why is it using /tmp? How much free space do I need on /tmp? Can/should I make the server use a different location instead of /tmp? Thanks, Mike Spreitzer
