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Disk Space for MySQL Databases in cPanel Show as 0MB

When you upgrade from cPanel 11.24 to 11.25, your users may notice that in cPanel, their MySQL databases show 0MB of disk space used, when they know their databases are much larger. This is due to an...

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New cPanel Database Mapping Feature: Is it for You?

It was announced by cPanel on April 14, 2010 that cPanel 11.25.1 will include a new database mapping feature that’s been long requested: the removal of cPanel username prefixes from the database names....

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Roundcube: MySQL or SQLite?

cPanel 11.25 introduces a new feature: The ability to have RoundCube use SQLite instead of MySQL. After benchmarking resource usage and performance, I’ve come to the conclusion that SQLite is...

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cPanel 11.25 Cheat Sheet

We’ve developed our first cPanel 11.25 cheat sheet, now available for your downloading pleasure. The sheet is comprised of common file, script, and configuration locations for help at a quick glance....

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Installing Custom MySQL Versions

Update 2/14/14: These instructions have been updated to apply to 11.36+. If at all possible, you should use WHM to install MySQL, however, if you need a version of MySQL outside of what they are...

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Restoring Database Privileges

I’ve seen several cases in the last few months where database users seemingly “disappear” or privileges appear to become invalid when restoring MySQL data or an entire server from raw backups. This...

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Upgrading MySQL Without Breaking PHP

There’s a dilemma amongst system administrators of high-traffic servers when it comes to doing updates – downtime. Most upgrades on a Linux/cPanel server can be done without interruption, but when it...

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How to Change the Location of MySQL on cPanel

There may be some situations where you have to move the location of MySQL, for example, if you’re out of disk space or perhaps looking to host it on another device to increase performance. Whatever the...

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How to Convert InnoDB to innodb_file_per_table and Shrink ibdata1

Years ago, MySQL started allowing InnoDB to possess separate tablespace per table instead of a massive unified ibdata1 file.  Tablespace is basically a logical storage area that contains table...

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This system already has a database owner named X

When attempting to create a user or restore a backup you may see this error: This system already has a database owner named___ To fix this, edit the following files on the system and remove entries...

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