(Henrik Ingo) One of my favorite MySQL tools ever is pt-query-digest. It’s the tool you use to generate a report of your slow query log (or some other supported sources), and is similar to for example the Query Analyzer in MySQL Enterprise Monitor.
Tag: Open Source
EXPLAIN FORMAT=JSON vs regular EXPLAIN
(Sergey Petrunia) Valeriy has mentioned that MySQL manual has no documentation about EXPLAIN FORMAT=JSON feature. There was a bug filed for this since September, 2012. I had spent some time looking at EXPLAIN FORMAT=JSON, so I thought I would share my findings.
Another reason why SQL_SLAVE_SKIP_COUNTER is bad in MySQL
(Jervin Real) It is everywhere in the world of MySQL that if your replication is broken because an event caused a duplicate key or a row was not found and it cannot be updated or deleted, then you can use ‘ STOP SLAVE; SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; START SLAVE; ’ and be done with it. In some
ERROR: could not access file ‘$libdir/plpython2’ – ERROR: could not access file ‘$libdir/plpython3’
(Raghavendra Rao) Above error described on PG mailing as it failes to CREATE LANGUAGE plpython2u/plpython3u on PG9.3Beta.
To UNION or not to UNION…
(Shinguz) Recently a forum question [ 1 ] got my attention:
Postgres 9.4 feature highlight: REFRESH CONCURRENTLY a materialized view
(Michael Paquier) Postgres 9.3 has introduced the first features related to materialized views. The upcoming version of Postgres is adding many basic things like the possibility to create, manage and refresh a materialized views. However, materialized views in Postgres 9.3 have a severe limitation c
Practical P_S: From which hosts are connections being attempted?
(Todd Farmer) MySQL Server has an aborted_connect status counter which will show you the number of failed attempts to establish a new connection. The manual describes potential causes as follows:
Creating and restoring database backups with mysqldump and MySQL Enterprise Backup – Part 1 of 2
(Tony Darnell) If you have used MySQL for a while, you have probably used mysqldump to backup your database. In part one of this blog, I am going to show you how to create a simple full and partial backup using mysqldump.
Resolving Error: master and slave have equal MySQL server UUIDs
(Chris Calender) If you’ve run into the following error, then there area couple quick fixes:
MySQL 5.6, InnoDB statistics, and testcases for optimizer
(Sergey Petrunia) One of the new features in MySQL 5.6 is persistent table statistics. The word “persistent” makes you think that table statistics will be very stable from now on.
