phpMyAdmin fails to export databases

Tags: cPaneldatabasesphpmyadmin

Published on: August 2, 2014 by Shafeer P

phpMyAdmin fails to export databases


While trying to export large databases via phpMyAdmin export database option, we may get an error like Browser can’t find the file. This issue only happen with large databases (eg ~40 MB). Databases can be exported via cPanel > Backup. But phpMyAdmin give control over tables.

Firefox can't find the file at https://

Tracing the problem

cPanel error log will give the exact reason

PHP Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 40747922 bytes) in /usr/local/cpanel/base/3rdparty/phpMyAdmin/libraries/OutputBuffering.class.php on line 138

From the above log, it is clear that it is a memory limit problem. So we have to increase the php memory limit.

Fixing the problem

phpMyAdmin uses a local php.ini so we have to modify the local value.

# vi /usr/local/cpanel/3rdparty/etc/phpmyadmin/php.ini

Find the field memory_limit and modify

;;;;;;;;;;;;;;;;;;; ; Resource Limits ; ;;;;;;;;;;;;;;;;;;;

max_execution_time = 90

;memory_limit = 128M ; Maximum amount of memory a script may consume (8MB)

memory_limit = 512M 

The memory limit is now lifted from 128MB to 512MB

Restart the cPanel service

# /etc/init.d/cpanel restart

The problem for the ROOT user (WHM > phpMyAdmin) is now fixed, He can export DBs.


But a normal user (cPanel > phpMyAdmin) may have the problem persists. In that case we need to modify the phpMyAdmin configuration.

For that edit the file

# vi /usr/local/cpanel/base/3rdparty/phpMyAdmin/

Add the following field

$cfg['MemoryLimit'] = '512M';

Finally restart the cPanel service

# /etc/init.d/cpanel restart




Category : cPanel, Troubleshooting

Shafeer P

Shafeer P

Shafeer is currently working as Senior System Engineer at SupportSages. He is capable of tackling time-consuming issues quickly with his advanced scripting abilities. His unchallenged expertise in solving complex issues in a cut-and-dried way makes him a dependable man in the team. The attitude and philosophy he shows on his workplace make his colleagues call him 'Mr. Perfectionist'. Furthermore, he is a travel and photography enthusiast, and loves to spend his leisure times on music and DIY arts.

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