licensing - Can I use MySql for free on my machine for developing …
2012年4月28日 · MySQL Is free to download and use. They also have an enterprise version available for subscription purchase and provides you with the database server as well as very nice premium support package and very robust utilities and tools such as Query Analyzer.
What does information_schema.TABLES.DATA_FREE mean in MySQL?
2014年3月14日 · According to MySQL's information on MySQL 5.6: The DATA_FREE column shows the free space in bytes for InnoDB tables. For earlier versions like 5.5: The DATA_FREE column shows the free space in bytes for InnoDB tables. For MySQL Cluster, DATA_FREE shows the space allocated on disk for, but not used by, a Disk Data table or fragment on disk.
Is it legal to using MySQL in commercial environment?
2015年10月28日 · MySQL itself is open source and can be used as a standalone product in a commercial environment. If you're running mySQL on a web server, you are free to do so for any purpose, commercial or not. If you run a website that uses mySQL, you won't need to release any of your code. You'll be fine.
MySQL what is the maximum size of a database? - Stack Overflow
According to the MySQL Manual: E.10.3. Limits on Table Size. The effective maximum table size for MySQL databases is usually determined by operating system constraints on file sizes, not by MySQL internal limits. The following table lists some examples of operating system file-size limits. This is only a rough guide and is not intended to be ...
MySQL InnoDB not releasing disk space after deleting data rows …
@Manachi The process is "configure the server to use innodb_file_per_table", "backup" the server, "drop the database(s)", stop the mysql, delete .ibd, start the server and restore the database(s). With MySQL 5.5+ you can use what Josh said, and after changing all tables, stop the server, delete the huge .ibd and start it again. –
Compare two MySQL databases - Stack Overflow
2008年10月22日 · Take a look at dbForge Data Compare for MySQL. It's a shareware with 30-days free trial period. It's a fast MySQL GUI tool for data comparison and synchronization, management of data differences, and customizable synchronization.
Is MySQL still a good choice for a free/open source database?
2010年9月9日 · Oracle shall continue to enhance MySQL and make subsequent versions of MySQL, including Version 6, available under the GPL. Oracle will not release any new, enhanced version of MySQL Enterprise Edition without contemporaneously releasing a new, also enhanced version of MySQL Community Edition licensed under the GPL.
How to shrink/purge ibdata1 file in MySQL - Stack Overflow
2010年8月11日 · If your goal is to monitor MySQL free space and you can't stop MySQL to shrink your ibdata file, then get it through table status commands. Example: MySQL > 5.1.24: mysqlshow --status myInnodbDatabase myTable | awk '{print $20}' MySQL < 5.1.24: mysqlshow --status myInnodbDatabase myTable | awk '{print $35}' Then compare this value to your ...
is it a good practice to use mysql_free_result ($result)?
Quoting the documentation of mysql_free_result: mysql_free_result() only needs to be called if you are concerned about how much memory is being used for queries that return large result sets. All associated result memory is automatically freed at the end of the script's execution.
MySQL maximum memory usage - Stack Overflow
MySQL's maximum memory usage very much depends on hardware, your settings and the database itself. Hardware. The hardware is the obvious part. The more RAM the merrier, faster disks ftw. Don't believe those monthly or weekly news letters though. MySQL doesn't scale linear - not even on Oracle hardware. It's a little trickier than that.
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