Why does `log_slow_queries` break `my.cnf`?

Question

Why can't I use slow_query_log on MySQL 5.6 on CentOS 6.4?

[mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock ...  ## Logging  ## *** THESE LOGS WORK JUST FINE *** log_error                       = /var/log/mysql/error.log general_log_file                = /var/log/mysql/mysql.log general_log                     = 1  ## *** THESE LOGS BREAK MYSQL *** #log_slow_queries               = /var/log/mysql/slow.log #long_query_time                = 5 #log-queries-not-using-indexes 

Here's the /var/log/mysql directory:

$ ls -lh total 100K -rw-r----- 1 mysql root   47K Nov 22 06:02 error.log -rw-rw---- 1 mysql root   42K Nov 22 06:05 mysql.log -rw-rw---- 1 mysql mysql    0 Nov 22 06:01 slow.log 

If I uncomment the log_slow_query lines in the /etc/my.cnf I receive the following error:

$ /etc/init.d/mysql restart Shutting down MySQL.. SUCCESS! Starting MySQL..... ERROR! The server quit without updating PID file (/var/lib/mysql/server.domain.com.pid). 

What am I missing?

Answer 1

Looks like MySQL changed the format. Now it's slow_query_log not log_slow_queries.

This works:

slow_query_log                  = 1 slow_query_log_file             = /var/log/mysql/slow.log long_query_time                 = 5