Magento SSH: How to disable Compiler

Disabling Magento compiler when Magento Admin Backend is inaccessible / down
Check current compilation status

$ php -f shell/compiler.php -- state
Compiler Status: Enabled
Compilation State: Compiled
Collected Files Count: 6042
Compiled Scopes Count: 4

Disable Magento compilation:

$ php -f shell/compiler.php -- disable
Compiler include path disabled

Clear all compiled files

$ php -f shell/compiler.php -- clear
Compilation successfully cleared

Ensure that compiler is disabled now by checking its status:

$ php -f shell/compiler.php -- state
Compiler Status:          Disabled
Compilation State:        Not Compiled
Collected Files Count:    0
Compiled Scopes Count:    0

Источник: http://kb.magenting.com/content/24/81/en/disable-magento-compiler.html