Tag Archives: Percona Toolkit

Alter mysql tables on the fly, without locking them

If you need to perform real-time ALTER TABLE processes on MySQL (InnoDB, TokuDB) tables, a great tool for the job is the Percona Toolkit. The Percona Toolkit includes a utility (pt-online-schema-change) to perform such a process, without write-locking tables, or having to manually create a temporary table and triggers to synchronize the data during the … Continue reading Alter mysql tables on the fly, without locking them

Kill all mysql queries having query time greater than 1 minute

At this point there are two approaches to achieve this. One is using pt-kill from Percona Toolkit, and the other one is to use a bash script with a lot of pipes :) Why would someone use the second approach? I don’t know, perhaps because there is no Percona Toolkit available. If you can/want to … Continue reading Kill all mysql queries having query time greater than 1 minute