Is there a drush script to disable all caches?

Question

I mean all of the caching options under admin/settings/performance. I frequently use drush sql-sync to keep my development copy up-to-date with the server. However, the server must have all of the caches turned on, obviously.

So I wonder: must I visit admin/settings/performance every time I update my db? Or is there a Drush script for that?

Answer 1

https://drupal.org/node/797346 for D7. For D6, https://drupal.org/project/cache_disable but it breaks the form cache. One needs to patch it to fall to DB cache for form caching. And probably update status cache too.

Answer 2

You need to set several variables to turn off caching on your dev site...

 drush vset cache 0
 drush vset preprocess_css 0
 drush vset preprocess_js 0
 drush vset page_cache_maximum_age 0
 drush vset views_skip_cache TRUE

It's even easier if you have conditional config in your settings.php file. Then you can refresh the DB and the changes will stick!

$conf['cache'] = 0; // Page cache $conf['page_cache_maximum_age'] = 0; // External cache TTL $conf['preprocess_css'] = FALSE; // Optimize css $conf['preprocess_js'] = FALSE; // Optimize javascript $conf['views_skip_cache'] = TRUE; // Views caching

... though if you just turn off various caching through the admin UI and clear cache once then you can theme away without turning off the rest... since script it less likely to change.

Answer 3

You can use your settings.php file to explicitly set variables to override your database settings. The values will be locked to whatever is set in the file, and cannot be changed through the admin interface.
At the end of the default file is a section which starts:

/**
 * Variable overrides:
 *
 * To override specific entries in the 'variable' table for this site,
 * set them here. You usually don't need to use this feature. This is
 * useful in a configuration file for a vhost or directory, rather than
 * the default settings.php. Any configuration setting from the 'variable'
 * table can be given a new value. Note that any values you provide in
 * these variable overrides will not be modifiable from the Drupal
 * administration interface.
 *
 * Remove the leading hash signs to enable.
 */
# $conf = array(
#   'site_name' => 'My Drupal site',
#   'theme_default' => 'minnelli',
#   'anonymous' => 'Visitor',

So to disable page, JS, and CSS caching, set cache, preprocess_js, and preprocess_css all to '0'

$conf = array(
  'cache' => '0',
  'preprocess_css' => '0',
  'preprocess_js' => '0',
);

The closing parenthesis for the array declaration is the last line of the default file, after a few more comment blocks, so make sure to uncomment it there rather than adding a new one. Also make sure that you don't have another $conf declaration that will conflict.

Answer 4

You could always use a drush aliases file on your dev server and set it up to skip the cache tables when you run sql-sync. The following would create aliases for your local dev server and your remote live server:

$aliases['dev'] = array(
    'root' => '/var/www/devroot',
);

$aliases['live'] = array(
    'root' => '/var/www/liveroot',
    'remote-host' => 'www.mysite.com',
    'remote-user' => 'exampleuser',
    'command-specific' => array (
       'sql-sync' => array (
         'skip-tables-list' => 'cache,cache_menu',
       ),
    ),
);

If you saved that under your home directory at:

~/.drush/mysite.aliases.drushrc.php

then you can call your sql-sync command like so:

drush sql-sync @mysite.live @mysite.dev

and it should skip the cache tables (obviously I only listed 2 there, but you could put anything in there, I even add watchdog in).

For more info on aliases and all the various options, check out the example file in your drush install at drush/examples/example.aliases.drushrc.php

As a last note for anyone who trys to use sql-sync, I had authentication issues when I first ran it, so if someone attempts this and gets errors about public/private keys then do the following:

drush dl drush_extras
drush pushkey @mysite.live
drush @mysite.live status

The pushkey command from drush_extras creates a private/public key pair and pushes the public key to the live server. The last command is just to check that it worked.

Answer 5

I have written a drush command which enables / disables all the following options:

cache
cache_lifetime
page_cache_maximum_age
preprocess_css
preprocess_js

Examples and code can be found here: http://ourlife01.blogspot.gr/2015/05/drush-command-to-enabledisable-cache.html

So in order to disable all of the above options, you just have to run:

drush cache-disable

The command:

drush cache-enable

is the same as setting the variables to the values:

cache: TRUE
cache_lifetime: 1 minute
page_cache_maximum_age: 1 hour
preprocess_css: TRUE
preprocess_js: TRUE

Answer 6

Also you can disable cache by below line, put it in settings.php files

$conf['display_cache_disable'] = TRUE;