Purge MYSQL Binary Logs On TMG

Revision as of 10:16, 10 July 2015

This page shows how to manually erase MYSQL Binary Logs On TMG to save your hard disk space

You need to SSh to the TMG host for the following procedures:

Verify your hard disk space

[root@TB00xxxx mysql]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda5             3.9G  1.1G  2.7G  29% /
/dev/sda7              21G  3.7G   17G  19% /mnt/.0
/dev/sda6             2.0G   36M  1.9G   2% /tmp
/dev/sda2             4.9G  4.6G  5.3M 100% /var
/dev/sda1             494M   16M  453M   4% /boot
tmpfs                 997M     0  997M   0% /dev/shm

MYSQL binlogs location

The directory of MYSQL binlogs is defined at /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

Purge unnecessary binlogs

1. Access mysql database

mysql -u user –ppassword
e.g. mysql -u tbdb –ptbdbpw

2. Execute the Purge command:

To erase all binlogs before a specific binlog file:
PURGE BINARY LOGS TO 'mysql-bin.010';

To erase all binlogs before a specific Date/Time:
PURGE BINARY LOGS BEFORE '2015-04-02 22:46:26';

Expire binary log files automatically

You can also set the expire_logs_days system variable to expire binary log files automatically after a given number of days. Simply add this to /etc/my.cnf

     [mysqld]
     expire-logs-days=60

• • Note: a 60 days rotation log is enabled by default in more recent TB products.

     Restart mysql
     service mysqld restart

Then mysqld will delete them for you automatically