title: MYSQL 5.6 Innodb buffer Pool is only used 14% out of 128G
body: <p>I'm running Percona cluster 5.6 (mysql 5.6) with 128G memory allowed for the innodb buffer pool.
  However, the workbench shows only 14% is being utilised.
  Can anybody let me know why the buffer pool usage is so low?
  Thanks in advance!</p>
  
  <p>This is my innodb settings</p>
  
  <pre><code>innodb_stats_sample_pages=142
  innodb_stats_persistent_sample_pages=142
  innodb_stats_transient_sample_pages=142
  innodb_open_files=4000
  innodb_additional_mem_pool_size = 16M
  innodb_buffer_pool_size = 128G
  innodb_buffer_pool_instances = 8
  innodb_data_file_path = ibdata1:10M:autoextend
  innodb_write_io_threads = 32
  innodb_read_io_threads = 32
  innodb_thread_concurrency = 16
  innodb_flush_log_at_trx_commit = 2
  innodb_log_buffer_size =256M
  innodb_log_file_size = 256M
  innodb_log_files_in_group = 3
  innodb_max_dirty_pages_pct = 90
  innodb_lock_wait_timeout = 120
  innodb_buffer_pool_load_at_startup = ON
  innodb_file_format = Barracuda
  innodb_file_format_max = Barracuda
  query_cache_type = 0
  </code></pre>