Mysql flush logs

The mysqladmin utility provides a command-line interface to some flush operations, using commands such as flush-hosts , flush-logs , flush-privileges , flush-status , and flush-tables. How do you MySQL? Closes and reopens any binary log file to which the server is writing.

If binary logging is enable the sequence number of the binary log file is incremented by one relative to the previous file. In situations where the binary log file is too big to open or load , you can use the command to create a new empty binary log file with the next sequence number. FLUSH LOGS just closes and reopens log files. I am not working alone on the test environment, so I suspect that the problem is likely that other users are connected.

I did however expect the flush to take place when they had completed their activities on the database, but this does not appear to be happening. To rename an error log file, do so manually before flushing. These logs contain all statements that update data or potentially could have updated it (for example, a DELETE which matched no rows). Depending on the size and number of your logs , those two commands may take a while to run, but the end result is that any unsaved transactions will be flushed to the database, all older logs will be droppe and the dex will be reset to 1. The sync_binlog flag only controls whether binary logs are flushed to disk.

Binary logs are used for replication, so they help replication not be completely broken by a crash. Not sure why this is happening. Even all the variables are exactly the same. The other logs were just flushed and re-opened under the same name.

At some point in time the server started to rename the error log to $OLD_NAME. This behaviour is inconsistent. The PURGE BINARY LOGS statement deletes all the binary log files listed in the dex file prior to the specified log file name or timestamp.

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. MySQL has a mutex for slow log writes. Will the bin- log files be flushed (as in purged), thus causing problems for the existing slave? Or would this just cause a new bin- log file to be created leaving the older files intact.

Meaning no problems for the existing slave. Hello mysql , mysql 3. I found this problem in two different Wincomputer that suffered of some power faults (standard computer, no raid or particular hdd). Mysql truncated some data without any particular notice in logs , I thought that was a rare case, but I found the same problem after few months in another computer with the same power-off history. Procedure: 1) In Master instance create a table and insert a row on it.

Truncate will lock the table if table is huge, since mysql. If you truncate while it is enabled. CSV or MyISAM ,meanwhile newly made entries will try to be written in general log table causing a lock for all the connection and will eventually end up with Too Many Connection. Content reproduced on this site is the property of the respective copyright holders. Mysql -bin on master or mysql -bin, mysql -relay-bin on slave?

I asked to a coworker for to test on Solaris box, since I was unable to repeat on Linux. The ideal management of these log files is different for each type of file.