Comments on: Mass killing of MySQL Connections

By: Andrew Watson

Andrew Watson — Fri, 29 May 2009 16:38:51 +0000

I do this:

mysqladmin proc | grep Sleep | sort -r -n -k6 | awk {’print $1; ‘} | xargs mysqladmin kill

or something to that effect…

By: Glynn Durham

Glynn Durham — Fri, 29 May 2009 10:39:31 +0000

How about a technique like this:

. File optimizeworld.sfs:
—
# Optimize tables in the World database.
SELECT ‘OPTIMIZE TABLE ‘, CONCAT(TABLE_SCHEMA, ‘.’, TABLE_NAME, ‘;’)
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = ‘World’;
—

. To execute:

shell> mysql –skip-column-names < optimizeworld.sfs | mysql

By: peter

peter — Wed, 27 May 2009 16:04:25 +0000

I see,

Standard MySQL is not what we call “our” MySQL

By: Bryan

Bryan — Wed, 27 May 2009 15:49:09 +0000

No Percona patches yet, unfortunately. We’re running the standard MySQL 5.0.77 on Centos.

By: peter

peter — Wed, 27 May 2009 15:34:49 +0000

Bryan,

Which version of Percona patches are you running ? It exists in recent ones for sure.

Thanks for command line version though.

By: Bryan

Bryan — Wed, 27 May 2009 15:24:34 +0000

If information_schema.processlist doesn’t exist on your version of MySQL, this works in a linux script:

#!/bin/bash
for each in `mysqladmin -u root -prootpwd processlist | awk ‘{print $2, $4, $8}’ | grep $dbname | grep $dbuser | awk ‘{print $1}’`;
do mysqladmin -u root -prootpwd kill $each;
done

By: peter

peter — Fri, 22 May 2009 16:48:51 +0000

Thanks Chip,

The good thing with having it done on SQL level is you do not need to install everything – not every server running MySQL has working perl python on php installed

By: Peter Stuifzand

Peter Stuifzand — Fri, 22 May 2009 12:37:00 +0000

A few years ago I wrote an article about how to use Vim with mysql to generate and execute SQL statements. It’s here: http://peterstuifzand.nl/external-programs-in-vim.html

By: Chip Turner

Chip Turner — Fri, 22 May 2009 06:59:53 +0000

Check out mypgrep.py from the google mysql tools project on code.google.com. It basically is a supercharged process grep for mysql, including the ability to kill processes.

By: peter

peter — Fri, 22 May 2009 05:24:04 +0000

Shlomi,

Yes… This is a design bug which is waiting to be fixed for years.