title: Why 'redis-cli monitor' command output only 'OK'?
body: <p>I'm try to setup redis on my local project which running on magento 1.7
  I follow this <a href="https://cloudkul.com/blog/configure-magento-1-9-x-with-redis-as-backend-cache/" rel="nofollow noreferrer">article</a> , do all steps:</p>
  
  <ol>
  <li>install redis server: </li>
  </ol>
  
  <blockquote>
    <p>sudo apt-get install redis-server</p>
  </blockquote>
  
  <ol start="2">
  <li>created Cm_RedisSession.xml, added content to it:</li>
  </ol>
  
  <blockquote>
  <pre><code>&lt;config&gt;
      &lt;modules&gt;
          &lt;Cm_RedisSession&gt;
              &lt;active&gt;true&lt;/active&gt;
              &lt;codePool&gt;community&lt;/codePool&gt;
          &lt;/Cm_RedisSession&gt;
      &lt;/modules&gt;
  &lt;/config&gt;
  </code></pre>
  </blockquote>
  
  <p>3.changed local.xml:</p>
  
  <pre><code>&lt;!-- This is a child node of config/global --&gt;
  &lt;cache&gt;
    &lt;backend&gt;Cm_Cache_Backend_Redis&lt;/backend&gt;
    &lt;backend_options&gt;
      &lt;server&gt;127.0.0.1&lt;/server&gt; &lt;!-- or absolute path to unix socket --&gt;
      &lt;port&gt;6379&lt;/port&gt;
      &lt;persistent&gt;&lt;/persistent&gt; &lt;!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 --&gt;
      &lt;database&gt;0&lt;/database&gt; &lt;!-- Redis database number; protection against accidental data loss is improved by not sharing databases --&gt;
      &lt;password&gt;&lt;/password&gt; &lt;!-- Specify if your server requires authentication --&gt;
      &lt;force_standalone&gt;0&lt;/force_standalone&gt;  &lt;!-- 0 for phpredis, 1 for standalone PHP --&gt;
      &lt;connect_retries&gt;1&lt;/connect_retries&gt;    &lt;!-- Reduces errors due to random connection failures; a value of 1 will not retry after the first failure --&gt;
      &lt;read_timeout&gt;10&lt;/read_timeout&gt;         &lt;!-- Set read timeout duration; phpredis does not currently support setting read timeouts --&gt;
      &lt;automatic_cleaning_factor&gt;0&lt;/automatic_cleaning_factor&gt; &lt;!-- Disabled by default --&gt;
      &lt;compress_data&gt;1&lt;/compress_data&gt;  &lt;!-- 0-9 for compression level, recommended: 0 or 1 --&gt;
      &lt;compress_tags&gt;1&lt;/compress_tags&gt;  &lt;!-- 0-9 for compression level, recommended: 0 or 1 --&gt;
      &lt;compress_threshold&gt;20480&lt;/compress_threshold&gt;  &lt;!-- Strings below this size will not be compressed --&gt;
      &lt;compression_lib&gt;gzip&lt;/compression_lib&gt; &lt;!-- Supports gzip, lzf, lz4 (as l4z) and snappy --&gt;
      &lt;use_lua&gt;0&lt;/use_lua&gt; &lt;!-- Set to 1 if Lua scripts should be used for some operations --&gt;
    &lt;/backend_options&gt;
  &lt;/cache&gt;
          &lt;!--session_save&gt;&lt;![CDATA[files]]&gt;&lt;/session_save--&gt;
  
  &lt;session_save&gt;db&lt;/session_save&gt;
          &lt;redis_session&gt;                       &lt;!-- All options seen here are the defaults --&gt;
              &lt;host&gt;127.0.0.1&lt;/host&gt;            &lt;!-- Specify an absolute path if using a unix socket --&gt;
              &lt;port&gt;6379&lt;/port&gt;
              &lt;password&gt;&lt;/password&gt;             &lt;!-- Specify if your server requires authentication --&gt;
              &lt;timeout&gt;2.5&lt;/timeout&gt;            &lt;!-- This is the connection timeout, not the locking timeout --&gt;
              &lt;persistent&gt;&lt;/persistent&gt;         &lt;!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 --&gt;
              &lt;db&gt;0&lt;/db&gt;                        &lt;!-- Redis database number; protection from accidental loss is improved by using a unique DB number for sessions --&gt;
              &lt;compression_threshold&gt;2048&lt;/compression_threshold&gt;  &lt;!-- Set to 0 to disable compression (recommended when suhosin.session.encrypt=on); known bug with strings over 64k: https://github.com/colinmollenhour/Cm_Cache_Backend_Redis/issues/18 --&gt;
              &lt;compression_lib&gt;gzip&lt;/compression_lib&gt;              &lt;!-- gzip, lzf, lz4 or snappy --&gt;
              &lt;log_level&gt;1&lt;/log_level&gt;               &lt;!-- 0 (emergency: system is unusable), 4 (warning; additional information, recommended), 5 (notice: normal but significant condition), 6 (info: informational messages), 7 (debug: the most information for development/testing) --&gt;
              &lt;max_concurrency&gt;6&lt;/max_concurrency&gt;                 &lt;!-- maximum number of processes that can wait for a lock on one session; for large production clusters, set this to at least 10% of the number of PHP processes --&gt;
              &lt;break_after_frontend&gt;5&lt;/break_after_frontend&gt;       &lt;!-- seconds to wait for a session lock in the frontend; not as critical as admin --&gt;
              &lt;fail_after&gt;10&lt;/fail_after&gt;                          &lt;!-- seconds after which we bail from attempting to obtain lock (in addition to break after time) --&gt;
              &lt;break_after_adminhtml&gt;30&lt;/break_after_adminhtml&gt;
              &lt;first_lifetime&gt;600&lt;/first_lifetime&gt;                 &lt;!-- Lifetime of session for non-bots on the first write. 0 to disable --&gt;
              &lt;bot_first_lifetime&gt;60&lt;/bot_first_lifetime&gt;          &lt;!-- Lifetime of session for bots on the first write. 0 to disable --&gt;
              &lt;bot_lifetime&gt;7200&lt;/bot_lifetime&gt;                    &lt;!-- Lifetime of session for bots on subsequent writes. 0 to disable --&gt;
              &lt;disable_locking&gt;0&lt;/disable_locking&gt;                 &lt;!-- Disable session locking entirely. --&gt;
              &lt;min_lifetime&gt;60&lt;/min_lifetime&gt;                      &lt;!-- Set the minimum session lifetime --&gt;
              &lt;max_lifetime&gt;2592000&lt;/max_lifetime&gt;                 &lt;!-- Set the maximum session lifetime --&gt;
          &lt;/redis_session&gt;
  </code></pre>
  
  <p>4.clear cache and session folders</p>
  
  <p>5.restart redis:</p>
  
  <pre><code>service redis-server restart
  </code></pre>
  
  <p>After that I type in terminal :</p>
  
  <pre><code>redis-cli monitor
  </code></pre>
  
  <p>And it output me only :</p>
  
  <pre><code>OK
  </code></pre>
  
  <p>But must be something like that:</p>
  
  <pre><code>OK
  1460100081.165665 [0 127.0.0.1:51706] "set" "foo" "bar"
  1460100083.053365 [0 127.0.0.1:51707] "get" "foo"
  </code></pre>
  
  <p>So I afraid in my case cashing is not generating. </p>