Mysql Purge Binary Logs
. Both “SHOW BINARY LOGS” and “SHOW MASTER LOGS” are synonyms. Purging MySQL binary log files using PURGE BINARY LOGS command The PURGE BINARY LOGS command deletes all the binary log files listed in the log index file prior to the specified log file name or date. I was under the impression that the PURGE MASTER command would delete the mysql-bin files, not the replay-bin files. I was looking at the manual earlier and could not find a reference to deleting the relay-bin files. Thankfully, the relay-bin files are small in size, but I would still like to prune them. Thoughts? Description: Calling 'PURGE BINARY LOGS TO 'binarylog.00003' causes the system to read the whole 'binarylog.00003' file. I recently upgraded from MySql 5.6.22 to MySql 5.7.10 and when the automatic purge for binary logs occurs (expirelogsdays), the system stalls for 8-12 seconds until it finishes.
I have a MySQL server with binary logging active. Once a day logs file is 'rotated', i.e. MySQL seems to stop writing to it and creates and new log file. You can delete old binary logs. Instead of deleting them directly, it is safer to use the MySQL-statement PURGE BINARY LOGS which also updates your mybinlog.index file. This file stores which filenames have been used for binary logging, seeFurther, you can configure your MySQL-Server to delete old binary logs automatically.
Set the variables maxbinlogsize and expirelogsdays in your server configuration to appropriate values.The ibdata and iblogfile files have nothing to do with binary logging. They are used by the innodb storage engine. Do not be mistaken by the fact that they do not seem to grow: If you have innodb-tables on your server, these files are important and deleting them may result in loss of data. You can read more about InnoDB in the docs. I finally found the answer on MySQL website. In case somebody needs this information:Prior to MySQL 5.0.60, PURGE BINARY LOGS TO and PURGE BINARY LOGS BEFORE did not behave in the same way (and neither one behaved correctly) when binary log files listed in the.index file had been removed from the system by some other means (such as using rm on Linux).
Beginning with MySQL 5.0.60, both variants of the statement fail with an error in such cases. (Bug#18199, Bug#18453) To handle such errors, edit the.index file (which is a simple text file) manually to ensure that it lists only the binary log files that are actually present, then run again the PURGE BINARY LOGS statement that failed.This means I should edit.index file manually and everything will be fine. What's interesting is that.index file is a regular textual file. I didn't even notice that until now.
I had an issue with free disk space (or, more appropriately, a lack there of) on my server a while back. After some investigation, I discovered that my MySQL databases had ballooned in size to nearly 10 GB.
Actually, figuring out that the /var/lib/mysql directory was taking up so much space wasn't that hard, but understanding why and what to do about it took a while (yes, I'm sometimes slow about such things).It turns out I had two issues. The first is that MySQL configuration, by default, maintains binary logs. These logs 'contain all statements that update data or potentially could have updated it (for example, a DELETE which matched no rows). Statements are stored in the form of 'events' that describe the modifications. The binary log also contains information about how long each statement took that updated data.'
I have a new HP laptop with Windows 7. After a little while of working I find that I can't click anything on my desktop any more. I have to go to. So I'm running windows 10 and as of today I'm unable to click any of the icons on my desktop. The reason why I say there seems to be an. Everything works great, except I CAN'T click my desktop icons. I have to right-click on the taskbar, click Show Desktop, and THEN I can click the desktop icons. But then, if I switch to another folder (IE or something), and minimize that folder, I can't click on the icons again. Cannot click on desktop. However, browser windows (Firefox) will work fine and I can click. Taskbar again but I could not right click the desktop or select desktop icons.
1 This is fine and all, but (again by default) these log files are never deleted. There is a (configurable) max file size for each log, but MySQL simply rolls over to a new log when it's reached. Additionally, MySQL rolls over to a new log file on every (re)start.
After a few months of operation, it's easy to see how this can take up a lot of space, and my server had been running for nearly four years.Complicating matters somewhat was the fact that the default name of the binary logs changed at some point (and, according to the current docs, now appears to have changed back. As a result, I have several gigabytes worth of logs using the old naming convention, as well as several gigabytes worth of logs using the newer convention.
Yay.Like I said, recognizing that MySQL was taking up a lot of space is not hard, but I'm paranoid about my data and didn't want to risk losing anything. So, I kept putting it off until I was literally running out of space on a near daily basis. At that point I began doing research and figured out all of the above information. I also found a quick an easy way to fix the problem.Note: This is meant for a standalone MySQL server.
I'm not sure how it may affect replication, so please do not follow these instructions on a replicated server without additional research.First of all, the binary logs typically reside in /var/lib/mysql/. You can check to see how much space they're currently taking up with this one-liner: du -hcs /var/lib/mysql/.bin. tail -n 1.
Mysql Purge Binary Logs Older Than
If it's more than a few hundred megabytes, you may want to continue on.Next, check to see if you were affected by the name switch like I was. This is unlikely unless you've been running the server for at least a year or so, but it definitely doesn't hurt to check. Look at all.bin. files. If they're all named the same, such as mysqld-bin.000001, then you're fine. If you see some with a different name, such as both mysqld-bin.000001 and hostname-bin.000001, then you have an outdated set of logs doing nothing but taking up space.
Look at the timestamps of the.index file for each set. One should be very recent (such as today), the other not. Once you've identified the older set, go ahead and delete all of them; they're no longer being used.Finally, for the current set, login to MySQL as an admin user (eg., mysql -u root -p). You'll want to run the following two commands:mysql FLUSH LOGS;mysql RESET MASTER;That's it. 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 dropped, and the log index will be reset to 1.
Delete Mysql Bin Logs
In my case, these two steps dropped my from 9.6 GB down to about 5 MB. Good stuff.Of course, this is simply a workaround to the problem, not a proper solution. What I'd really like to do is either automate this process so that I don't have to worry about the logs getting out of control, or even better configure MySQL to automatically flush its own logs after some period of time or it reaches a certain total file size. I haven't found any way to do this just yet, though I admittedly haven't looked too hard.
I'd appreciate any recommendations, though. 1.