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It does not release storage to the file system. ![]() So after purging those rows from the log table, the tablespace file (usually ibdata1) still keeps the same storage. This same nice property also translates to a not so nice one: data can be greatly fragmented across the tablespace.Īn annoying property of InnoDB’s tablespaces is that they never shrink. Thus, if I purge many rows from my log table, the now unused space can be occupied by new rows of any other table. #TRIM ENABLER VOLUME NOT WRITABLE OR LOW ON SPACE FREE#This allows for the following nice property: free space can be shared between different tables and different schemes. Having everything in one big file means all tables and indexes, from all schemes, are ‘mixed’ together in that file. I will discuss the advantages and disadvantages of the two options, and will strive to convince that innodb_file_per_table is preferable. Throw everything in one big file (optionally split). When working with InnoDB, you have two ways for managing the tablespace storage: ![]() Here is a nice article by Shlomi Noach, where I found (this and more information about) this.Ĭredits to Shlomi Noach. Seek help from the manufacturer for more information.The shortest way I found was: ALTER TABLE YOURTABLE ENGINE=InnoDBĪfter truncating or deleting the unvanted records I ran this and the tablespace shrinked. Many removable disks have a limit on the amount of reads and writes it can perform in it’s lifetime. If the removable disk is old, it could have just reached it’s natural end of life. If you have tried all the above options, it is likely the removable disk is broken. Check with the manufacturer of your device to see if a utility exists. Certain manufacturers of removable drives may provide a utility to format the disk. If you wish to format a disk, right-click the disk and select “ Format…“. A format will erase all date off the drive. You may need to format the drive to get it to work properly again. Your removable disk drive may be in a state where the file system is corrupted. If the “ WriteProtect” value does not exist in either location, this security setting may not be your issue. If it does not exist, follow the same steps as above, but replace “ HKEY_LOCAL_MACHINE” with “ HKEY_CURRENT_USER“. Look for a value named “ WriteProtect“. #TRIM ENABLER VOLUME NOT WRITABLE OR LOW ON SPACE WINDOWS#
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