MySQL enable logs, and view logs

MySQL has the following types of logs:
Error log:-log-err
Query log:-log
Slow query log:-log-slow-queries
Update log:-log-update
Binary log:-log-bin


Whether the log is enabled
Mysql>show variables like ' log_% ';

How to know the current log
Mysql> Show master status;

Show binary log Entries
Mysql> show master logs;

See binary log files with Mysqlbinlog
Shell>mysqlbinlog mail-bin.000001
or Shell>mysqlbinlog mail-bin.000001 | Tail

Specify the output location of the log in the configuration file.
The windows:windows configuration file is My.ini, usually under the MySQL installation directory or under C:\Windows.
The Linux:linux configuration file is my.cnf, usually in/etc.

Under Linux:

SQL code

1. # Enter in [mysqld]
2. #log
3. log-error=/usr/Local/mysql/log/error.log
4. log=/usr/Local/mysql/log/mysql.log
5. long_query_time=2
6. log-slow-queries=/usr/Local/mysql/log/slowquery.log

Under Windows:

SQL code

1. # Enter in [mysqld]
2. #log
3. log-error="E:/progra~1/easyph~1.0b1/mysql/logs/error.log"
4. log="E:/progra~1/easyph~1.0b1/mysql/logs/mysql.log"
5. long_query_time=2
6. log-slow-queries= "E:/progra~1/easyph~1.0b1/mysql/logs/slowquery.log"

Turn on Slow query
Long_query_time = 2-refers to how long the SQL executed will be log down, here is 2 seconds
log-slow-queries=/usr/local/mysql/log/slowquery.log--Log the query back to a slower statement

Log-queries-not-using-indexes = nouseindex.log--literally, log down without using the indexed query