Contents
How does purge binary log work in MySQL?
The binary log is a set of files that contain information about data modifications made by the MySQL server. The log consists of a set of binary log files, plus an index file (see Section 5.4.4, “The Binary Log” ). The PURGE BINARY LOGS statement deletes all the binary log files listed in the log index file prior to the specified log file name
Is it safe to delete MySQL replication logs?
For MySQL Replication, it’s safe to delete all logs that have been replicated and applied on slaves. Check the Relay_Master_Log_File value on the server:
What happens to deleted log files in MySQL?
Deleted log files also are removed from the list recorded in the index file, so that the given log file becomes the first in the list. PURGE BINARY LOGS requires the BINLOG_ADMIN privilege. This statement has no effect if the server was not started with the –log-bin option to enable binary logging.
How to delete / flush / clear all MySQL logs?
If you’re on Linux, you can use mv to rename log files while they’re in use, and then after FLUSH LOGS, you know that MySQL is writing to a new, small file, and you can remove the old big files. Binary logs are different. To eliminate old binlogs, use PURGE BINARY LOGS. Make sure your slaves (if any) aren’t still using the binary logs.
Where can I find binary logs in MySQL?
MySQL binary logs are in /data/mysql. If binary logging was enabled there will always be at least two files with the characteristic suffixes. mysqld 30257 mysql 5u REG 253,5 0 81 /tmp/ib8iroKe (deleted)
Where to find MySQL error messages and logs?
MySQL writes log messages and errors into /var/log/mysql/mysql.err. 1wand 2ware file descriptors 1 (stdout) and 2 (stderr) and both were redirected from console to the specified file. mysqld 30257 mysql 13w REG 253,4 45502 270719 /var/log/mysql/slow.log MySQL slow log can be found in /var/log/mysql.
What’s the difference between a binary and Master log?
The log consists of a set of binary log files, plus an index file (see Section 5.4.4, “The Binary Log” ). The PURGE BINARY LOGS statement deletes all the binary log files listed in the log index file prior to the specified log file name or date. BINARY and MASTER are synonyms.
What is a binary log file in MySQL?
The binary log is a set of files that contain information about data modifications made by the MySQL server. The log consists of a set of binary log files, plus an index file (see Section 5.4.4, “The Binary Log” ).
How to show master logs in MySQL 5.7?
show binary logs show master logs Lists the binary log files on the server. This statement is used as part of the procedure described in Section 13.4.1.1, “PURGE BINARY LOGS Statement” , that shows how to determine which logs can be purged.