Firs you need to find the phpmyadmin php.ini file. Use this command to find all php.ini files:
find /usr -name php.ini
Then find the path to the php.ini file that is listed in the “phpmyadmin” folder.
Next find these two section and change the limit how you want:
upload_max_filesize = 150M
post_max_size = 150M
I wouldn’t go above 200
Than restart cpanel from the command line:
service cpanel restart
By default, PhpMyAdmin in a Cpanel server imposes an upload limit of 50MB. So importing a SQL file larger than 50MB may time out.
Cpanel PhpMyAdmin uses the php.ini file /usr/local/cpanel/3rdparty/etc/phpmyadmin/php.ini. To increase upload limit, change values of upload_max_filesize and post_max_size in this php.ini file. Typically, you may set value of post_max_size to twice the value of upload_max_filesize. For example, to import SQL files up to 250MB size, set upload_max_filesize to 250MB and post_max_size to 500MB. You may also want to change values of max_execution_time and memory_limit.
Typical values may be:
upload_max_filesize = 250MB
post_max_size = 500MB
memory_limit = 512MB
max_execution_time = 3600